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Ubuntu Security Notice USN-2944-1
April 04, 2016

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

- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- libav: Multimedia player, server, encoder and transcoder

Details:

It was discovered that Libav incorrectly handled certain malformed media
files. If a user were tricked into opening a crafted media 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.

Update instructions:

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

Ubuntu 12.04 LTS:
  libavcodec53                    4:0.8.17-0ubuntu0.12.04.2
  libavformat53                   4:0.8.17-0ubuntu0.12.04.2

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

References:
  http://www.ubuntu.com/usn/usn-2944-1
  CVE-2014-8541, CVE-2015-1872, CVE-2015-3395, CVE-2015-5479,
  CVE-2015-6818, CVE-2015-6820, CVE-2015-6824, CVE-2015-6826,
  CVE-2015-8364, CVE-2015-8365, CVE-2016-1897, CVE-2016-1898,
  CVE-2016-2326, CVE-2016-2330

Package Information:
  https://launchpad.net/ubuntu/+source/libav/4:0.8.17-0ubuntu0.12.04.2