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

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Message-ID: <4611B859.7040705@determina.com>
Date: Mon, 02 Apr 2007 19:13:45 -0700
From: Alexander Sotirov <asotirov@...ermina.com>
To: George Ou <george_ou@...architect.net>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Windows .ANI LoadAniIcon Stack Overflow

George Ou wrote:
> The exploited instance of IE7 probably spawns cmd.exe with the same
> privilege levels as IE7 in Protected Mode, which means you don't have
> read/write access to the user or system files.  It's still bad because you
> probably get to harvest all of the saved username/passwords in the browser
> and capture all input/output from that IE session.
> 
> Now in the case of an exploited Firefox 2, you have full read/write
> permissions to all of the user files which means you get to steal all the
> user files and/or encrypt them for ransom.

Protected Mode only blocks write access. IE can write only to a few locations on
the system, but it still has full read access to all files readable by the user.

See http://msdn.microsoft.com/library/en-us/IETechCol/dnwebgen/ProtectedMode.asp
and slides 41-53 in
http://download.microsoft.com/download/0/1/3/01381C25-72DA-4AA9-B792-43E02A243C71/SEC403_Riley.ppt

Alex

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