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

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Message-ID: <29289413.1198675497273.JavaMail.root@elwamui-lapwing.atl.sa.earthlink.net>
Date: Wed, 26 Dec 2007 08:24:57 -0500 (GMT-05:00)
From: Elazar Broad <elazarb@...thlink.net>
To: Valdis.Kletnieks@...edu, 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

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@...edu
>Sent: Dec 26, 2007 1:28 AM
>To: reepex <reepex@...il.com>
>Cc: Elazar Broad <elazarb@...thlink.net>, full-disclosure@...ts.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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