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

[Elazar Broad <elazarb () earthlink net>]

Thanks for the clarification Vladis. To me the A's are kind of like the UV dye that they put in an AC system when 
looking for leaks...

Elazar

-----Original Message-----
> From: Valdis.Kletnieks () vt edu
> Sent: Dec 26, 2007 1:28 AM
> To: reepex <reepex () gmail com>
> Cc: Elazar Broad <elazarb () earthlink net>, full-disclosure () lists grok org uk
> Subject: Re: [Full-disclosure] 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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