full-disclosure - Re: AOL YGP Picture Editor YGPPicEdit.dll Multiple Buffer Overflows

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Message-ID: <654.1198650532@turing-police.cc.vt.edu>
Date: Wed, 26 Dec 2007 01:28:52 -0500
From: Valdis.Kletnieks@...edu
To: reepex <reepex@...il.com>
Cc: Elazar Broad <elazarb@...thlink.net>, full-disclosure@...ts.grok.org.uk
Subject: Re: AOL YGP Picture Editor YGPPicEdit.dll
	Multiple Buffer Overflows

On Tue, 25 Dec 2007 21:53:29 CST, reepex said:

> How does a bunch of 'A's prove something is exploitable?

If a bunch of A's causes the EIP to end up as x'41414141', it's 95% of the
way to being an exploit.  If it gets you some *other* crash, it's probably
at least 30% to 40% of the way to an exploit.

Go back and read the analysis of the NTP buffer overflow from a number of years
back.  Truly a classic - they managed to leverage a *one byte* overflow into
a complete and total rooting of the box.

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