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Date: Wed, 19 Nov 2014 06:00:01 +0300
From: Alexander Cherepanov <>
Subject: Re: RE: [security-vendor] Re: Fuzzing
 findings (and maybe CVE requests) - Image/GraphicsMagick, elfutils, GIMP,
 gdk-pixbuf, file, ndisasm, less

On 2014-11-19 02:50, Seth Arnold wrote:
> On Wed, Nov 19, 2014 at 12:21:29AM +0100, Hanno Böck wrote:
>> It'd already be a good start to do this for format-parsing tools. So
>> stuff that runs on files. Everything else is more complicated, fuzzing
>> file formats is the easiest.
> You'd be surprised how infrequently file formats come up.. :)

zzuf can fuzz network too.

>>> Getting AFL to work with every package suggested for Ubuntu main is
>>> probably too much work.
>> You may overestimate the complexity of afl. Once you get used to it it
>> basically takes minutes to start a fuzzing job.
>> And Michal is very open to suggestions to improve it (and it is
>> improving on a daily basis right now).
> Oh, AFL itself looks pretty blindingly easy to use: CC=... CXX=...  and go
> with it. It's our packaging and building infrastracture that I think would
> make it more complicated: they're designed to make repeatable builds
> easy, not necessarily to allow arbitrary changes to the compiler. And,
> AFL only works for C/C++.

That's an advanced mode of AFL. Too advanced for many things, I would 
say. Use afl-fuzz -dn or zzuf. You need just a sample (or several) for a 
format you are interested in.

Alexander Cherepanov

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