USN-1705-1: Libav vulnerabilities

28 January 2013

libav vulnerabilities

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10

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 12.10
libavcodec53 - 6:0.8.5-0ubuntu0.12.10.1
libavformat53 - 6:0.8.5-0ubuntu0.12.10.1
Ubuntu 12.04 LTS
libavcodec53 - 4:0.8.5-0ubuntu0.12.04.1
libavformat53 - 4:0.8.5-0ubuntu0.12.04.1
Ubuntu 11.10
libavcodec53 - 4:0.7.6-0ubuntu0.11.10.3
libavformat53 - 4:0.7.6-0ubuntu0.11.10.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References