The Mandriva Security Team published a new security update: MDKSA-2005:232 - Updated gstreamer-ffmpeg packages fix buffer overflow vulnerability for Mandriva Linux. Here the announcement:

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Mandriva Linux Security Advisory MDKSA-2005:232
http://www.mandriva.com/security/
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Package : gstreamer-ffmpeg
Date : December 14, 2005
Affected: 2006.0
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Problem Description:

Simon Kilvington discovered a vulnerability in FFmpeg libavcodec,
which can be exploited by malicious people to cause a DoS (Denial
of Service) and potentially to compromise a user's system.

The vulnerability is caused due to a boundary error in the
"avcodec_default_get_buffer()" function of "utils.c" in libavcodec.
This can be exploited to cause a heap-based buffer overflow when a
specially-crafted 1x1 ".png" file containing a palette is read.

Gstreamer-ffmpeg is built with a private copy of ffmpeg containing
this same code.

The updated packages have been patched to prevent this problem.
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References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4048
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Updated Packages:

Mandriva Linux 2006.0:
1e7f7ad8be3efcc5152901d1de9050c7 2006.0/RPMS/gstreamer-ffmpeg-0.8.6-1.1.20060mdk.i586.rpm
2923eb22aafa7aedd073516e47a7d94f 2006.0/SRPMS/gstreamer-ffmpeg-0.8.6-1.1.20060mdk.src.rpm

Mandriva Linux 2006.0/X86_64:
617b165113eb1af7e805d7c2423a771b x86_64/2006.0/RPMS/gstreamer-ffmpeg-0.8.6-1.1.20060mdk.x86_64.rpm
2923eb22aafa7aedd073516e47a7d94f x86_64/2006.0/SRPMS/gstreamer-ffmpeg-0.8.6-1.1.20060mdk.src.rpm
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To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.

All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:

gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98

You can view other update advisories for Mandriva Linux at:

http://www.mandriva.com/security/advisories

If you want to report vulnerabilities, please contact

security_(at)_mandriva.com
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Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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