full-disclosure - Re: Fuzzing and SEH

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Message-ID: <4CD2F5F7.9050106@extendedsubset.com>
Date: Thu, 04 Nov 2010 13:05:43 -0500
From: Marsh Ray <marsh@...endedsubset.com>
To: primehaxor <primehaxor@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Fuzzing and SEH

On 11/04/2010 06:30 AM, primehaxor wrote:
> Hi list,
>
> When i run some fuzzing tests i can't trap the exception when found some
> bug due invalid input. I'm trying to figure out a smart way to handle
> the exception, and tell me when it run.

Your question lacks specifics.

> On the PoC i've got the daemon crashed but it still working whithout
> response the requests.

For example, you use the term "SEH" in the title which implies an MS 
Windows environment, now you're talking about a "daemon" which usually 
implies a Unix environment.

> I'm reading the Sulley framework and PyDBG doc to find some trick to get
> it working.
>
> Any ideia?

Uhh, set a breakpoint on the exception (or its handler)?  I don't know 
the specific tools you mention, but it's pretty basic debugger 
functionality.

- Marsh

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