full-disclosure - Buffer Overflow vulnerability in WindowsDisplay Manager [Suspected]

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Date: Tue Jan  3 23:10:23 2006
From: pvnick at gmail.com (Paul)
Subject: Buffer Overflow vulnerability in WindowsDisplay
	Manager [Suspected]

I can repro this on Windows XP Pro with IE7. However, it does not appear to
be exploitable. Internet explorer terminates after attempting to execute the
following statement:

034ED914   8C82 60770100    MOV WORD PTR DS:[EDX+17760],ES
EDX=0

So it's a null pointer bug.

Regards,
Paul
Greyhats Security 
 

-----Original Message-----
From: full-disclosure-bounces@...ts.grok.org.uk
[mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of InfoSecBOFH
Sent: Monday, January 02, 2006 1:54 PM
To: Stan Bubrouski
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: [Full-disclosure] Buffer Overflow vulnerability in
WindowsDisplay Manager [Suspected]

Crash dump would be nice too.

I have seen this once before but had issues replicating it with other
display drivers.

On 1/2/06, Stan Bubrouski <stan.bubrouski@...il.com> wrote:
> Well if you look at the fact there is no title on titlebar and the
> fact the active tab is Untitled, I'd hazard to guess its something he
> manually entered into the address bar, and so we don't even know if
> this is exploitable by clicking a link or whatnot.
>
> Not exactly sure why this was posted if no details are provided.
> Anything else for us Sumit?
>
> -sb
>
> On 1/2/06, Lise Moorveld <lise_moorveld@...oo.com> wrote:
> > Dear Sumit,
> >
> > Could you tell me how you exploited this buffer
> > overflow issue in Firefox so I can try and reproduce
> > it? I notice a lot of A's in your address bar but I'm
> > not sure whether that's it and if so, how many A's are
> > used.
> >
> > Regards,
> >
> > Lise
> >
> > --- Sumit Siddharth <sumit.siddharth@...il.com> wrote:
> >
> > > Hi,
> > > The Windows display manager crashes when a BOF is
> > > attempted on a mozilla
> > > firefox.
> > > This has different results on different windows
> > > machine.
> > > In Windows XP only the display manager crashes ,
> > > whereas on a Windows 2000
> > > server the BSOD(Blue screen of death )appears and
> > > the system hangs.
> > > I am using Firefox 1.0.6. I think that the bug is in
> > > the display driver and
> > > not with firefox. Kindly find a screen shot attached
> > > with this email.
> > >
> > > Thanks
> > > Sumit
> > >
> > >
> > > --
> > >
> > > Sumit Siddharth
> > > Information Security Analyst
> > > NII Consulting
> > > Web: www.nii.co.in
> > > ------------------------------------
> > > NII Security Advisories
> > > http://www.nii.co.in/resources/advisories.html
> > > ------------------------------------
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> _______________________________________________
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