Cisco Security Advisory: Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerability

Cisco Systems Product Security Incident Response Team psirt at cisco.com
Wed Mar 25 11:00:00 CDT 2009


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Cisco Security Advisory: Cisco IOS Software Session Initiation
Protocol Denial of Service Vulnerability

Advisory ID: cisco-sa-20090325-sip

http://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml

Revision 1.0

For Public Release 2009 March 25 1600 UTC (GMT)

- ---------------------------------------------------------------------

Summary
=======

A vulnerability exists in the Session Initiation Protocol (SIP)
implementation in Cisco IOS Software that can be exploited remotely
to cause a reload of the Cisco IOS device.

Cisco has released free software updates that address this
vulnerability. There are no workarounds available to mitigate the
vulnerability apart from disabling SIP, if the Cisco IOS device does
not need to run SIP for VoIP services. However, mitigation techniques
are available to help limit exposure to the vulnerability.

This advisory is posted at the following link: 
http://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml

Note: The March 25, 2009, Cisco IOS Security Advisory bundled
publication includes eight Security Advisories. All of the advisories
address vulnerabilities in Cisco IOS Software. Each advisory lists
the releases that correct the vulnerability or vulnerabilities in the
advisory. The following table lists releases that correct all Cisco
IOS Software vulnerabilities that have been published in Cisco
Security Advisories on March 25, 2009, or earlier.

http://www.cisco.com/warp/public/707/cisco-sa-20090325-bundle.shtml

Individual publication links are listed below:

  * Cisco IOS cTCP Denial of Service Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-ctcp.shtml

  * Cisco IOS Software Multiple Features IP Sockets Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-ip.shtml

  * Cisco IOS Software Mobile IP and Mobile IPv6 Vulnerabilities
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-mobileip.shtml

  * Cisco IOS Software Secure Copy Privilege Escalation Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-scp.shtml

  * Cisco IOS Software Session Initiation Protocol Denial of Service
    Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml

  * Cisco IOS Software Multiple Features Crafted TCP Sequence
    Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-tcp.shtml

  * Cisco IOS Software Multiple Features Crafted UDP Packet
    Vulnerability
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-udp.shtml

  * Cisco IOS Software WebVPN and SSLVPN Vulnerabilities
    http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml

Affected Products
=================

This vulnerability only affects devices running Cisco IOS Software
with SIP voice services enabled.

Vulnerable Products
+------------------

Cisco devices running affected Cisco IOS Software versions that
process SIP messages are affected. The only requirement for this
vulnerability is that the Cisco IOS device process SIP messages as
part of configured VoIP functionality. Note that this does not apply
to the processing of SIP messages as part of the NAT and firewall
feature sets.

Recent versions of Cisco IOS Software do not process SIP messages by
default. Creating a dial peer by way of the command dial-peer voice
will start the SIP processes and cause the Cisco IOS device to start
processing SIP messages. In addition, several features within Cisco
Unified Communications Manager Express, such as ePhones, once
configured will also automatically start the SIP process, which will
cause the device to start processing SIP messages. An example of an
affected configuration is as follows:

    dial-peer voice <Voice dial-peer tag> voip
     ...
    !

Note: Older versions of Cisco IOS Software were affected by a bug
that caused Cisco IOS Software to process SIP messages without being
configured for SIP operation. Refer to http://www.cisco.com/warp/
public/707/cisco-sa-20070131-sip.shtml for additional information on
Cisco bug ID CSCsb25337.

In addition to inspecting the Cisco IOS device configuration for a
dial-peer command that causes the device to process SIP messages,
administrators can also use the command show processes | include SIP
to determine whether Cisco IOS Software is running the processes that
handle SIP messages. In the following example, the presence of the
processes CCSIP_UDP_SOCKET and CCSIP_TCP_SOCKET indicates that the
Cisco IOS device is processing SIP messages:

        Router#show processes | include SIP
         147 Mwe 40F46DF4           12          2    600023468/24000  0 CCSIP_SPI_CONTRO
         148 Mwe 40F21244            0          1       0 5524/6000   0 CCSIP_DNS
         149 Mwe 40F48254            4          1    400023108/24000  0 CCSIP_UDP_SOCKET
         150 Mwe 40F48034            4          1    400023388/24000  0 CCSIP_TCP_SOCKET

Warning: Since there are several ways a device running Cisco IOS
Software can start processing SIP messages, it is recommended that
the show processes | include SIP command be used to determine whether
the device is processing SIP messages instead of relying on the
presence of specific configuration commands.

To determine the Cisco IOS Software release that is running on a
Cisco product, administrators can log in to the device and issue the
show version command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying
text similar to "Cisco Internetwork Operating System Software" or
"Cisco IOS Software." The image name displays in parentheses,
followed by "Version" and the Cisco IOS Software release name. Other
Cisco devices do not have the show version command or may provide
different output.

The following example identifies a Cisco product that is running
Cisco IOS Software Release 12.3(26) with an installed image name of
C2500-IS-L:

    Router#show version
    Cisco Internetwork Operating System Software
    IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
    Technical Support: http://www.cisco.com/techsupport
    Copyright (c) 1986-2008 by cisco Systems, Inc.
    Compiled Mon 17-Mar-08 14:39 by dchih

    !--- output truncated


The following example identifies a Cisco product that is running
Cisco IOS Software Release 12.4(20)T with an installed image name of
C1841-ADVENTERPRISEK9-M:

    Router#show version
    Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
    Technical Support: http://www.cisco.com/techsupport
    Copyright (c) 1986-2008 by Cisco Systems, Inc.
    Compiled Thu 10-Jul-08 20:25 by prod_rel_team

    !--- output truncated


Additional information about Cisco IOS Software release naming
conventions is available in "White Paper: Cisco IOS Reference Guide"
at the following link: http://www.cisco.com/warp/public/620/1.html

Products Confirmed Not Vulnerable
+--------------------------------

The SIP Application Layer Gateway (ALG), which is used by the Cisco
IOS NAT and firewall features of Cisco IOS Software, is not affected
by this vulnerability.

Cisco devices that are running Cisco IOS XE Software and Cisco IOS XR
Software are not affected.

No other Cisco products are currently known to be affected by this
vulnerability.

Details
=======

SIP is a popular signaling protocol that is used to manage voice and
video calls across IP networks such as the Internet. SIP is
responsible for handling all aspects of call setup and termination.
Voice and video are the most popular types of sessions that SIP
handles, but the protocol has the flexibility to accommodate other
applications that require call setup and termination. SIP call
signaling can use UDP (port 5060), TCP (port 5060), or TLS (TCP port
5061) as the underlying transport protocol.

A denial of service (DoS) vulnerability exists in the SIP
implementation in Cisco IOS Software. This vulnerability is triggered
by processing a specific and valid SIP message.

This vulnerability is documented in Cisco Bug ID CSCsu11522 and has
been assigned Common Vulnerabilities and Exposures (CVE) ID 
CVE-2009-0636.

Note: The vulnerabilities described in the advisories Cisco IOS
Software Multiple Features IP Sockets Vulnerability and Cisco IOS
Software Multiple Features Crafted UDP Packet Vulnerability, both
part of this bundle of Cisco IOS advisories, may also impact SIP
operations.

Vulnerability Scoring Details
=============================

Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding
CVSS at

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at

http://intellishield.cisco.com/security/alertmanager/cvss

CSCsu11522 - A voice gateway may crash when processing valid SIP

CVSS Base Score - 7.8

 Access Vector           - Network
 Access Complexity       - Low
 Authentication          - None
 Confidentiality Impact  - None
 Integrity Impact        - None
 Availability Impact     - Complete

CVSS Temporal Score - 6.4

 Exploitability          - Functional
 Remediation Level       - Official-Fix
 Report Confidence       - Confirmed

Impact
======

Successful exploitation of the vulnerability described in this
document may result in a reload of the device. The issue could be
repeatedly exploited to cause an extended DoS condition.

Software Versions and Fixes
===========================

When considering software upgrades, also consult 
http://www.cisco.com/go/psirt and any subsequent advisories to 
determine exposure and a complete upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.

Each row of the Cisco IOS software table (below) names a Cisco IOS
release train. If a given release train is vulnerable, then the
earliest possible releases that contain the fix (along with the
anticipated date of availability for each, if applicable) are listed
in the "First Fixed Release" column of the table. The "Recommended
Release" column indicates the releases which have fixes for all the
published vulnerabilities at the time of this Advisory. A device
running a release in the given train that is earlier than the release
in a specific column (less than the First Fixed Release) is known to
be vulnerable. Cisco recommends upgrading to a release equal to or
later than the release in the "Recommended Releases" column of the
table.

Note: In addition to CSCsu11522 and because of its impact on SIP
operation, this table of fixed software takes into consideration the
vulnerability tracked by Cisco Bug CSCsk64158 , from "Cisco Security
Advisory: Crafted UDP Packet Affects Multiple Cisco IOS Features" 
(http://www.cisco.com/warp/public/707/cisco-sa-20090325-udp.shtml)
The table does not take into consideration the vulnerability
disclosed by "Cisco Security Advisory: Cisco IOS IP Sockets
Vulnerability Affecting Multiple Cisco IOS Features", which may
impact SIP over TLS.

+-------------------------------------------------------------------+
|   Major    |          Availability of Repaired Releases           |
|  Release   |                                                      |
|------------+------------------------------------------------------|
| Affected   |                                     | Recommended    |
| 12.0-Based | First Fixed Release                 | Release        |
| Releases   |                                     |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0       | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0DA     | Vulnerable; first fixed in 12.2DA   | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0DB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0DC     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.0S      | 12.0(32)S12                         | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
| 12.0SC     | Vulnerable; first fixed in 12.0S    | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
| 12.0SL     | Vulnerable; first fixed in 12.0S    | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0SP     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.0ST     | Vulnerable; first fixed in 12.0S    | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
| 12.0SX     | Vulnerable; first fixed in 12.0S    | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
| 12.0SY     | 12.0(32)SY8                         | 12.0(32)SY8    |
|------------+-------------------------------------+----------------|
| 12.0SZ     | Vulnerable; first fixed in 12.0S    | 12.0(32)S12    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0T      | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.0W      | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.0WC     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.0WT     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XC     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XD     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XE     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.0XF     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XG     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XH     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            | Releases prior to 12.0(4)XI2 are    | 12.4(18e)      |
|            | vulnerable, release 12.0(4)XI2 and  |                |
| 12.0XI     | later are not vulnerable; first     | 12.4(23a);     |
|            | fixed in 12.4                       | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XJ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XK     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XL     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XM     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XN     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XQ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XR     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XS     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XT     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.0XV     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| Affected   |                                     | Recommended    |
| 12.1-Based | First Fixed Release                 | Release        |
| Releases   |                                     |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1       | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.1AA     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1AX     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.1(22)EA13   |
| 12.1AY     | Vulnerable; first fixed in 12.1EA   |                |
|            |                                     | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.1(22)EA13   |
| 12.1AZ     | Vulnerable; first fixed in 12.1EA   |                |
|            |                                     | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.1CX     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1DA     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1DB     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1DC     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1E      | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.1EA     | 12.1(22)EA13                        | 12.1(22)EA13   |
|------------+-------------------------------------+----------------|
| 12.1EB     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SCB1   |
| 12.1EC     | Vulnerable; first fixed in 12.3BC   |                |
|            |                                     | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
| 12.1EO     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1EU     | Vulnerable; first fixed in 12.2SG   | 12.2(31)SGA9   |
|------------+-------------------------------------+----------------|
| 12.1EV     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1EW     | Vulnerable; migrate to 12.2SGA      | 12.2(31)SGA9   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1EX     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.1EY     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.1EZ     | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1GA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1GB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1T      | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XC     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XD     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XE     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XF     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XG     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XH     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XI     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XJ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XL     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XM     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XP     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XQ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XR     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XS     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XT     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XU     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XV     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XW     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XX     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XY     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1XZ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YC     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YD     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            | Releases prior to 12.1(5)YE6 are    | 12.4(18e)      |
|            | vulnerable, release 12.1(5)YE6 and  |                |
| 12.1YE     | later are not vulnerable; first     | 12.4(23a);     |
|            | fixed in 12.4                       | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YF     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.1YH     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.1YI     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.1(22)EA13   |
| 12.1YJ     | Vulnerable; first fixed in 12.1EA   |                |
|            |                                     | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| Affected   |                                     | Recommended    |
| 12.2-Based | First Fixed Release                 | Release        |
| Releases   |                                     |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2       | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2B      | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to 12.2SCB or   | 12.2(33)SCB1   |
| 12.2BC     | 12.3BC                              |                |
|            |                                     | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2BW     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2BX     | Vulnerable; migrate to 12.2SB       | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2BY     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2BZ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to 12.2SCB or   | 12.2(33)SCB1   |
| 12.2CX     | 12.3BC                              |                |
|            |                                     | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to 12.2SCB or   | 12.2(33)SCB1   |
| 12.2CY     | 12.3BC                              |                |
|            |                                     | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
| 12.2CZ     | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            | 12.2(12)DA14; Available on          |                |
| 12.2DA     | 30-JUL-2009                         | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2DD     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2DX     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2EW     | Vulnerable; first fixed in 12.2SG   | 12.2(31)SGA9   |
|------------+-------------------------------------+----------------|
| 12.2EWA    | Vulnerable; first fixed in 12.2SG   | 12.2(31)SGA9   |
|------------+-------------------------------------+----------------|
| 12.2EX     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2EY     | 12.2(44)EY                          | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2EZ     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2FX     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2FY     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2FZ     | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SRC4;  |
| 12.2IRA    | Vulnerable; first fixed in 12.2SRC  | Available on   |
|            |                                     | 18-MAY-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SRC4;  |
| 12.2IRB    | Vulnerable; first fixed in 12.2SRC  | Available on   |
|            |                                     | 18-MAY-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXA    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXB    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXC    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXD    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXE    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXF    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to any release  | 12.2(18)IXH;   |
| 12.2IXG    | in 12.2IXH                          | Available on   |
|            |                                     | 31-MAR-2009    |
|------------+-------------------------------------+----------------|
| 12.2JA     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2JK     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2MB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2MC     | 12.2(15)MC2m                        | 12.2(15)MC2m   |
|------------+-------------------------------------+----------------|
| 12.2S      | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
|            | 12.2(28)SB13                        |                |
|            |                                     |                |
| 12.2SB     | 12.2(31)SB14                        | 12.2(33)SB4    |
|            |                                     |                |
|            | 12.2(33)SB3                         |                |
|------------+-------------------------------------+----------------|
| 12.2SBC    | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
| 12.2SCA    | Vulnerable; first fixed in 12.2SCB  | 12.2(33)SCB1   |
|------------+-------------------------------------+----------------|
| 12.2SCB    | 12.2(33)SCB1                        | 12.2(33)SCB1   |
|------------+-------------------------------------+----------------|
|            | 12.2(50)SE                          |                |
|            |                                     |                |
| 12.2SE     | 12.2(46)SE2                         | 12.2(44)SE6    |
|            |                                     |                |
|            | 12.2(44)SE5                         |                |
|------------+-------------------------------------+----------------|
| 12.2SEA    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SEB    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SEC    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SED    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SEE    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SEF    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
| 12.2SEG    | Vulnerable; first fixed in 12.2SE   | 12.2(44)SE6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(52)SG;    |
| 12.2SG     | 12.2(50)SG                          | Available on   |
|            |                                     | 15-MAY-2009    |
|------------+-------------------------------------+----------------|
| 12.2SGA    | 12.2(31)SGA9                        | 12.2(31)SGA9   |
|------------+-------------------------------------+----------------|
| 12.2SL     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.2SM     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SO     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SQ     | 12.2(44)SQ1                         |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SRD1   |
|            |                                     |                |
| 12.2SRA    | Vulnerable; first fixed in 12.2SRC  | 12.2(33)SRC4;  |
|            |                                     | Available on   |
|            |                                     | 18-MAY-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SRC4;  |
|            |                                     | Available on   |
|            |                                     | 18-MAY-2009    |
|            |                                     |                |
| 12.2SRB    | Vulnerable; first fixed in 12.2SRC  | 12.2(33)SRD1   |
|            |                                     |                |
|            |                                     | 12.2(33)SRB5a; |
|            |                                     | Available on   |
|            |                                     | 3-April-2009   |
|------------+-------------------------------------+----------------|
|            | 12.2(33)SRC4; Available on          | 12.2(33)SRC4;  |
| 12.2SRC    | 18-MAY-2009                         | Available on   |
|            |                                     | 18-MAY-2009    |
|------------+-------------------------------------+----------------|
| 12.2SRD    | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.2STE    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2SU     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2SV     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SVA    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SVC    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SVD    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SVE    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SW     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2SX     | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2SXA    | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2SXB    | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2SXD    | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2SXE    | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2SXF    | 12.2(18)SXF16                       | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
|            | 12.2(33)SXH5; Available on          | 12.2(33)SXH5;  |
| 12.2SXH    | 20-APR-2009                         | Available on   |
|            |                                     | 20-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2SXI    | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.2SY     | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
| 12.2SZ     | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2T      | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2TPC    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XB     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XC     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XD     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XE     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            | Vulnerable; migrate to 12.2SCB or   | 12.2(33)SCB1   |
| 12.2XF     | 12.3BC                              |                |
|            |                                     | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XG     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XH     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XI     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XJ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XK     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XL     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XM     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SB4    |
| 12.2XN     | Vulnerable; first fixed in 12.2SRC  |                |
|            |                                     | 12.2(33)SRD1   |
|------------+-------------------------------------+----------------|
| 12.2XNA    | Vulnerable; migrate to any release  | 12.2(33)SRD1   |
|            | in 12.2SRD                          |                |
|------------+-------------------------------------+----------------|
| 12.2XNB    | 12.2(33)XNB1                        | 12.2(33)XNB3   |
|------------+-------------------------------------+----------------|
| 12.2XNC    | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.2XO     | 12.2(46)XO                          | 12.2(46)XO     |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XQ     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XR     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XS     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XT     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XU     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XV     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2XW     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2YA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2YB     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YC     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YD     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YE     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YF     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YG     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YH     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YJ     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YK     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YL     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2YM     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2YN     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YO     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2YP     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2YQ     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YR     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YS     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.2YT     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YU     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YV     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YW     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YX     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YY     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2YZ     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZA     | Vulnerable; first fixed in 12.2SXF  | 12.2(18)SXF16  |
|------------+-------------------------------------+----------------|
| 12.2ZB     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZC     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZD     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2ZE     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2ZF     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.2ZG     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.2ZH     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2ZJ     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZL     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZP     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.2(33)SXH5;  |
| 12.2ZU     | Vulnerable; first fixed in 12.2SXH  | Available on   |
|            |                                     | 20-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.2ZX     | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
| 12.2ZY     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.2ZYA    | 12.2(18)ZYA1                        | 12.2(18)ZYA1   |
|------------+-------------------------------------+----------------|
| Affected   |                                     | Recommended    |
| 12.3-Based | First Fixed Release                 | Release        |
| Releases   |                                     |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.3       | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3B      | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3BC     | 12.3(23)BC6                         | 12.3(23)BC6    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3BW     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3EU     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.3JA     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.3JEA    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.3JEB    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.3JEC    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3JK     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3JL     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.3JX     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3T      | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3TPC    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.3VA     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.3XA     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3XB     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XC     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XD     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.3XE     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3XF     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XG     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3XI     | Vulnerable; first fixed in 12.2SB   | 12.2(33)SB4    |
|------------+-------------------------------------+----------------|
| 12.3XJ     | Vulnerable; first fixed in 12.3YX   | 12.3(14)YX14   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XK     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XL     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XQ     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(18e)      |
|            |                                     |                |
| 12.3XR     | Vulnerable; first fixed in 12.4     | 12.4(23a);     |
|            |                                     | Available on   |
|            |                                     | 30-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XS     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XU     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3XW     | Vulnerable; first fixed in 12.3YX   | 12.3(14)YX14   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XX     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XY     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3XZ     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YA     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YD     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3YF     | Vulnerable; first fixed in 12.3YX   | 12.3(14)YX14   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YG     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YH     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YI     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YJ     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YK     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3YM     | 12.3(14)YM13                        | 12.3(14)YM13   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YQ     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YS     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YT     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3YU     | Vulnerable; first fixed in 12.4XB   | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.3YX     | 12.3(14)YX14                        | 12.3(14)YX14   |
|------------+-------------------------------------+----------------|
| 12.3YZ     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.3ZA     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| Affected   |                                     | Recommended    |
| 12.4-Based | First Fixed Release                 | Release        |
| Releases   |                                     |                |
|------------+-------------------------------------+----------------|
|            | 12.4(18e)                           | 12.4(18e)      |
|            |                                     |                |
| 12.4       | 12.4(23)                            | 12.4(23a);     |
|            |                                     | Available on   |
|            | 12.4(23a); Available on 30-APR-2009 | 30-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.4JA     | 12.4(16b)JA1                        |                |
|------------+-------------------------------------+----------------|
| 12.4JDA    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4JK     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4JL     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4JMA    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4JMB    | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4JX     | Vulnerable; first fixed in 12.4JA   |                |
|------------+-------------------------------------+----------------|
| 12.4MD     | 12.4(11)MD7                         | 12.4(11)MD7    |
|------------+-------------------------------------+----------------|
| 12.4MR     | 12.4(19)MR1                         | 12.4(19)MR2    |
|------------+-------------------------------------+----------------|
| 12.4SW     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
|            | 12.4(20)T2                          |                |
|            |                                     | 12.4(22)T1     |
|            | 12.4(15)T8                          |                |
| 12.4T      |                                     | 12.4(15)T9;    |
|            | 12.4(22)T                           | Available on   |
|            |                                     | 29-APR-2009    |
|            | 12.4(15)T9; Available on            |                |
|            | 29-APR-2009                         |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XA     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            | 12.4(15)T8                          | 12.4(22)T1     |
|            |                                     |                |
| 12.4XB     | 12.4(20)T2                          | 12.4(15)T9;    |
|            |                                     | Available on   |
|            | 12.4(15)T9; Available on            | 29-APR-2009    |
|            | 29-APR-2009                         |                |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XC     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            | 12.4(4)XD12; Available on           | 12.4(4)XD12;   |
| 12.4XD     | 27-MAR-2009                         | Available on   |
|            |                                     | 27-MAR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XE     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XF     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            | 12.4(15)T8                          |                |
| 12.4XG     |                                     | 12.4(15)T9;    |
|            | 12.4(20)T2                          | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XJ     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XK     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.4XL     | 12.4(15)XL4                         | 12.4(15)XL4    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XM     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.4XN     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4XP     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4XQ     | 12.4(15)XQ2                         | 12.4(15)XQ2    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XR     | 12.4(15)XR4                         | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XT     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.4XV     | Vulnerable; contact TAC             |                |
|------------+-------------------------------------+----------------|
| 12.4XW     | 12.4(11)XW10                        | 12.4(11)XW10   |
|------------+-------------------------------------+----------------|
|            |                                     | 12.4(22)T1     |
|            |                                     |                |
| 12.4XY     | Vulnerable; first fixed in 12.4T    | 12.4(15)T9;    |
|            |                                     | Available on   |
|            |                                     | 29-APR-2009    |
|------------+-------------------------------------+----------------|
| 12.4XZ     | 12.4(15)XZ2                         | 12.4(15)XZ2    |
|------------+-------------------------------------+----------------|
| 12.4YA     | 12.4(20)YA2                         | 12.4(20)YA3    |
|------------+-------------------------------------+----------------|
| 12.4YB     | Not Vulnerable                      |                |
|------------+-------------------------------------+----------------|
| 12.4YD     | Not Vulnerable                      |                |
+-------------------------------------------------------------------+

Workarounds
===========

If the affected Cisco IOS device requires SIP for VoIP services, SIP
cannot be disabled, and therefore, no workarounds are available.
Users are advised to apply mitigation techniques to help limit
exposure to the vulnerability. Mitigation consists of allowing only
legitimate devices to connect to the routers. To increase
effectiveness, the mitigation must be coupled with anti-spoofing
measures on the network edge. This action is required because SIP can
use UDP as the transport protocol.

Additional mitigations that can be deployed on Cisco devices within
the network are available in the companion document "Cisco Applied
Mitigation Bulletin: Identifying and Mitigating Exploitation of the
Cisco IOS SIP and Crafted UDP Vulnerabilities", which is available at
the following location: 
http://www.cisco.com/warp/public/707/cisco-amb-20090325-sip-and-udp.shtml

Disable SIP Listening Ports
+--------------------------

For devices that do not require SIP to be enabled, the simplest and
most effective workaround is to disable SIP processing on the device.
Some versions of Cisco IOS Software allow administrators to
accomplish this with the following commands:

    sip-ua
     no transport udp
     no transport tcp

Warning: When applying this workaround to devices that are processing
Media Gateway Control Protocol (MGCP) or H.323 calls, the device will
not stop SIP processing while active calls are being processed. Under
these circumstances, this workaround should be implemented during a
maintenance window when active calls can be briefly stopped.

After applying this workaround, administrators are advised to use the
show commands, as discussed in the Affected Products section of this
advisory, to confirm that the Cisco IOS device is no longer
processing SIP messages.

Control Plane Policing
+---------------------

For devices that need to offer SIP services it is possible to use
Control Plane Policing (CoPP) to block SIP traffic to the device from
untrusted sources. Cisco IOS Releases 12.0S, 12.2SX, 12.2S, 12.3T,
12.4, and 12.4T support the CoPP feature. CoPP may be configured on a
device to protect the management and control planes to minimize the
risk and effectiveness of direct infrastructure attacks by explicitly
permitting only authorized traffic sent to infrastructure devices in
accordance with existing security policies and configurations. The
following example can be adapted to the network:


    !-- The 192.168.1.0/24 network and the 172.16.1.1 host are trusted.
    !-- Everything else is not trusted. The following access list is used
    !-- to determine what traffic needs to be dropped by a control plane
    !-- policy (the CoPP feature.) If the access list matches (permit)
    !-- then traffic will be dropped and if the access list does not
    !-- match (deny) then traffic will be processed by the router.

    access-list 100 deny udp 192.168.1.0 0.0.0.255 any eq 5060
    access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5060
    access-list 100 deny tcp 192.168.1.0 0.0.0.255 any eq 5061
    access-list 100 deny udp host 172.16.1.1 any eq 5060
    access-list 100 deny tcp host 172.16.1.1 any eq 5060
    access-list 100 deny tcp host 172.16.1.1 any eq 5061
    access-list 100 permit udp any any eq 5060
    access-list 100 permit tcp any any eq 5060
    access-list 100 permit tcp any any eq 5061

    !-- Permit (Police or Drop)/Deny (Allow) all other Layer3 and Layer4
    !-- traffic in accordance with existing security policies and
    !-- configurations for traffic that is authorized to be sent
    !-- to infrastructure devices.
    !-- Create a Class-Map for traffic to be policed by
    !-- the CoPP feature.

    class-map match-all drop-sip-class
      match access-group 100

    !-- Create a Policy-Map that will be applied to the
    !-- Control-Plane of the device.

    policy-map drop-sip-traffic
     class drop-sip-class
      drop

    !-- Apply the Policy-Map to the Control-Plane of the
    !-- device.

    control-plane
     service-policy input drop-sip-traffic

Warning: Because SIP can use UDP as a transport protocol, it is
possible to easily spoof the IP address of the sender, which may
defeat access control lists that permit communication to these ports
from trusted IP addresses.

In the above CoPP example, the access control entries (ACEs) that
match the potential exploit packets with the "permit" action result
in these packets being discarded by the policy-map "drop" function,
while packets that match the "deny" action (not shown) are not
affected by the policy-map drop function. Additional information on
the configuration and use of the CoPP feature can be found at 
http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html
and 
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html

Obtaining Fixed Software
========================

Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at 
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html,
or as otherwise set forth at Cisco.com Downloads at 
http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact psirt at cisco.com or security-alert at cisco.com for
software upgrades.

Customers with Service Contracts
+-------------------------------

Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com

Customers using Third Party Support Organizations
+------------------------------------------------

Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.

Customers without Service Contracts
+----------------------------------

Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.

  * +1 800 553 2447 (toll free from within North America)
  * +1 408 526 7209 (toll call from anywhere in the world)
  * e-mail: tac at cisco.com

Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.

Refer to 
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.

This vulnerability was discovered during handling of customer service
requests.

Status of this Notice: FINAL
============================

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.

Distribution
============

This advisory is posted on Cisco's worldwide website at :

http://www.cisco.com/warp/public/707/cisco-sa-20090325-sip.shtml

In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

  * cust-security-announce at cisco.com
  * first-bulletins at lists.first.org
  * bugtraq at securityfocus.com
  * vulnwatch at vulnwatch.org
  * cisco at spot.colorado.edu
  * cisco-nsp at puck.nether.net
  * full-disclosure at lists.grok.org.uk
  * comp.dcom.sys.cisco at newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.

Revision History
================

+---------------------------------------+
| Revision |               | Initial    |
| 1.0      | 2009-March-25 | public     |
|          |               | release    |
+---------------------------------------+

Cisco Security Procedures
=========================

Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at 
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco 
security notices. All Cisco security advisories are available at 
http://www.cisco.com/go/psirt
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