[c-nsp] Cisco Security Advisory: Cisco ASA Software IKEv1 and IKEv2 Buffer Overflow Vulnerability
Andrew (Andy) Ashley
andrew.a at aware.co.th
Thu Feb 11 14:35:51 UTC 2016
Is a control-plane ACL to limit isakmp traffic (UDP/500) to an affected ASA from desired sources enough to mitigate this attack, until upgrades can be performed?
From: NANOG <nanog-bounces+andrew.a=aware.co.th at nanog.org> on behalf of Adrian M <adrian.minta at gmail.com>
Date: Thursday, 11 February 2016 at 15:53
To: "nanog at nanog.org" <nanog at nanog.org>
Subject: Re: [c-nsp] Cisco Security Advisory: Cisco ASA Software IKEv1 and IKEv2 Buffer Overflow Vulnerability
>Be careful, It appears that something is broken with ARP on this release.
>We have no ARP on lan interface, and somebody else has a similar problem:
>On Wed, Feb 10, 2016 at 10:36 PM, Sadiq Saif <lists at sadiqs.com> wrote:
>> Update your ASAs folks, this is a critical one.
>> -------- Forwarded Message --------
>> Subject: [c-nsp] Cisco Security Advisory: Cisco ASA Software IKEv1 and
>> IKEv2 Buffer Overflow Vulnerability
>> Date: Wed, 10 Feb 2016 08:06:51 -0800
>> From: Cisco Systems Product Security Incident Response Team
>> <psirt at cisco.com>
>> Reply-To: psirt at cisco.com
>> To: cisco-nsp at puck.nether.net
>> CC: psirt at cisco.com
>> Cisco Security Advisory: Cisco ASA Software IKEv1 and IKEv2 Buffer
>> Overflow Vulnerability
>> Advisory ID: cisco-sa-20160210-asa-ike
>> Revision 1.0
>> For Public Release 2016 February 10 16:00 GMT (UTC)
>> A vulnerability in the Internet Key Exchange (IKE) version 1 (v1) and
>> IKE version 2 (v2) code of Cisco ASA Software could allow an
>> unauthenticated, remote attacker to cause a reload of the affected
>> system or to remotely execute code.
>> The vulnerability is due to a buffer overflow in the affected code area.
>> An attacker could exploit this vulnerability by sending crafted UDP
>> packets to the affected system. An exploit could allow the attacker to
>> execute arbitrary code and obtain full control of the system or to cause
>> a reload of the affected system.
>> Note: Only traffic directed to the affected system can be used to
>> exploit this vulnerability. This vulnerability affects systems
>> configured in routed firewall mode only and in single or multiple
>> context mode. This vulnerability can be triggered by IPv4 and IPv6 traffic.
>> Cisco has released software updates that address this vulnerability.
>> This advisory is available at the following link:
>> cisco-nsp mailing list cisco-nsp at puck.nether.net
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
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