CPE dns hijacking malware

Tom Morris blueneon at gmail.com
Tue Nov 12 17:58:46 UTC 2013

EXTREMELY common. Almost all Comcast Cable CPE has this same login,
cusadmin / highspeed
At least on AT&T U-Verse gear, there's a sticker on the modem with the
password which is a hash of the serial number or something equally unique.

Almost all home routers also tend to have the default credentials.

I'm actually surprised it was this long before XSS exploits and similar
garbage started hitting them.

Personally I have fond memories of going into my neighbor's router,
flashing it with dd-wrt which allowed manual channel setting, and moving it
off of the same wifi channel mine was on.... That was probably not a great
idea, but you do what you have to sometimes.

On Tue, Nov 12, 2013 at 10:57 AM, Matthew Galgoci <mgalgoci at redhat.com>wrote:

> > Date: Tue, 12 Nov 2013 06:35:51 +0000
> > From: "Dobbins, Roland" <rdobbins at arbor.net>
> > To: NANOG list <nanog at nanog.org>
> > Subject: Re: CPE  dns hijacking malware
> >
> >
> > On Nov 12, 2013, at 1:17 PM, Jeff Kell <jeff-kell at utc.edu> wrote:
> >
> > > (2) DHCP hijacking daemon installed on the client, supplying the
> hijacker's DNS servers on a DHCP renewal.  Have seen both, the latter being
> more
> > > common, and the latter will expand across the entire home subnet in
> time (based on your lease interval)
> >
> > I'd (perhaps wrongly) assumed that this probably wasn't the case, as the
> OP referred to the CPE devices themselves as being malconfigured; it would
> be helpful to know if the OP can supply more information, and whether or
> not he'd a chance to examine the affected CPE/end-customer setups.
> >
> I have encountered a family members provider supplied CPE that had the
> web server exposed on the public interface with default credentials still
> in place. It's probably more common than one would expect.
> --
> Matthew Galgoci
> Network Operations
> Red Hat, Inc
> 919.754.3700 x44155
> ------------------------------
> "It's not whether you get knocked down, it's whether you get up." - Vince
> Lombardi

Tom Morris, KG4CYX
Mad Scientist and Operations Manager, WDNA-FM 88.9 Miami - Serious Jazz!
151.820 Megacycles

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