full-disclosure - Re: [gif2png] long filename Buffer Overrun

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Date: Sun, 13 Dec 2009 01:29:49 +0200
From: Patroklos Argyroudis <argp@...sus-labs.com>
To: Razuel Akaharnath <razuel@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: [gif2png] long filename Buffer Overrun

On Sat, Dec 12, 2009 at 10:59:28PM +0200, Razuel Akaharnath wrote:
> DESCRIPTION:
> "The gif2png program converts files from the obsolescent Graphic Interchange
> Format to Portable Network Graphics <http://www.libpng.org/pub/png/>. The
> conversion preserves all graphic information, including transparency,
> perfectly. The gif2png program can even recover data from corrupted GIFs."
> 
> homepage: http://catb.org/~esr/gif2png/ <http://catb.org/%7Eesr/gif2png/>
> 
> VULNERABILITY:
> gif2png does not perform proper bounds checking on the size of input
> filename. The buffer (1025 in size) is easily overrun with a strcpy
> function.
> 
> AFFECTED VERSION:
> latest: 2.5.2

I have reported this to Debian about two months ago:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550978

-- 
Patroklos Argyroudis
http://www.census-labs.com/

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