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Ubuntu Security Notice USN-1209-1
September 19, 2011

ffmpeg vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

FFmpeg could be made to run programs as your login if it opened a specially
crafted file.

Software Description:
- ffmpeg: multimedia player, server and encoder

Details:

It was discovered that FFmpeg incorrectly handled certain malformed ogg
files. If a user were tricked into opening a crafted ogg file, an attacker
could cause a denial of service via application crash, or possibly execute
arbitrary code with the privileges of the user invoking the program. This
issue only affected Ubuntu 10.10. (CVE-2011-1196)

It was discovered that FFmpeg incorrectly handled certain malformed AMV
files. If a user were tricked into opening a crafted AMV file, an attacker
could cause a denial of service via application crash, or possibly execute
arbitrary code with the privileges of the user invoking the program. This
issue only affected Ubuntu 10.10. (CVE-2011-1931)

It was discovered that FFmpeg incorrectly handled certain malformed APE
files. If a user were tricked into opening a crafted APE file, an attacker
could cause a denial of service via application crash. (CVE-2011-2161)

Emmanouel Kellinis discovered that FFmpeg incorrectly handled certain
malformed CAVS files. If a user were tricked into opening a crafted CAVS
file, an attacker could cause a denial of service via application crash, or
possibly execute arbitrary code with the privileges of the user invoking
the program. (CVE-2011-3362)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 10.10:
  libavcodec52                    4:0.6-2ubuntu6.2
  libavformat52                   4:0.6-2ubuntu6.2

Ubuntu 10.04 LTS:
  libavcodec52                    4:0.5.1-1ubuntu1.2
  libavformat52                   4:0.5.1-1ubuntu1.2

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1209-1
  CVE-2011-1196, CVE-2011-1931, CVE-2011-2161, CVE-2011-3362

Package Information:
  https://launchpad.net/ubuntu/+source/ffmpeg/4:0.6-2ubuntu6.2
  https://launchpad.net/ubuntu/+source/ffmpeg/4:0.5.1-1ubuntu1.2