full-disclosure - Re: Windows .ANI LoadAniIcon Stack Overflow

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Message-ID: <46100B19.2040904@immunityinc.com>
Date: Sun, 01 Apr 2007 15:42:17 -0400
From: Dave Aitel <dave@...unityinc.com>
To: Larry Seltzer <Larry@...ryseltzer.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Windows .ANI LoadAniIcon Stack Overflow

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ASRL has limited entropy and the attacker can continue to try exploits
an infinite number of times (as Solar Eclipse points out). This means
you can write a reliable Vista exploit, theoretically. I'll probably
finish one up on Monday.

IE in protected mode would still allow you access to the local network
and, more importantly, anything IE does. You could, for example,
inject code into all viewed webpages that steals passwords and
whatnot. Just at the very minimum.

- -dave

Larry Seltzer wrote:
>>> It is completely possible to execute shellcode if we can do some DEP
> bypass (ie. ret2libc attack, etc..) 
>
> In Vista this should have problems because of ASLR, right?
>
> I'm beginning to think that web-based attacks with this in Vista aren't
> really so scary. Even if you can get them to execute what can you really
> do in IE protected mode? You need to get the user to run the ANI outside
> of IE. Can anyone say what actually happens if you read an e-mail in the
> Vista Mail program with an attack ANI embedded?
>
> Larry Seltzer
> eWEEK.com Security Center Editor
> http://security.eweek.com/
> http://blog.eweek.com/blogs/larry%5Fseltzer/
> Contributing Editor, PC Magazine
> larryseltzer@...fdavis.com
>
> _______________________________________________
> Full-Disclosure - We believe in it.
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