2008/09/29 #2008-013 MPlayer Real demuxer heap overflow

Description:

The MPlayer multimedia player suffers from a vulnerability which could result
in arbitrary code execution and at the least, in unexpected process
termination.

Three integer underflows located in the Real demuxer code can be used to
exploit a heap overflow, a specific video file can be crafted in order to make
the stream_read function reading or writing arbitrary amounts of memory.

The following patch fixes the issue:
http://www.ocert.org/patches/2008-013/mplayer_demux_real.patch

Affected version:

MPlayer <= 1.0_rc2

Fixed version:

MPlayer, N/A

Credit: vulnerability report, patch and PoC code received from Felipe Andres
Manzano <fmanzano [at] fceia [dot] unr [dot] edu [dot] ar>.

CVE: CVE-2008-3827

Timeline:
2008-08-12: vulnerability report received
2008-08-24: contacted mplayer maintainers
2008-08-25: maintainer provides patch
2008-08-28: reporter indicates that the patch is incomplete and sends new PoC
2008-09-15: maintainer provides updated patch
2008-09-16: reporter confirms patch
2008-09-29: advisory release

References:

Links:
http://www.mplayerhq.hu

Permalink:
http://www.ocert.org/advisories/ocert-2008-013.html

-- 
Andrea Barisani |                Founder & Project Coordinator
          oCERT | Open Source Computer Emergency Response Team

<lcars@ocert.org>                         http://www.ocert.org
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