USN-825-1: libvorbis vulnerability

24 August 2009

libvorbis vulnerability

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

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS

Software Description

  • libvorbis

Details

It was discovered that libvorbis did not correctly handle certain malformed ogg files. If a user were tricked into opening a specially crafted ogg file with an application that uses libvorbis, an attacker could execute arbitrary code with the user’s privileges. (CVE-2009-2663)

USN-682-1 provided updated libvorbis packages to fix multiple security vulnerabilities. The upstream security patch to fix CVE-2008-1420 introduced a regression when reading sound files encoded with libvorbis 1.0beta1. This update corrects the problem.

Original advisory details:

It was discovered that libvorbis did not correctly handle certain malformed sound files. If a user were tricked into opening a specially crafted sound file with an application that uses libvorbis, an attacker could execute arbitrary code with the user’s privileges. (CVE-2008-1420)

Update instructions

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

Ubuntu 9.04
libvorbis0a - 1.2.0.dfsg-3.1ubuntu0.9.04.1
Ubuntu 8.10
libvorbis0a - 1.2.0.dfsg-3.1ubuntu0.8.10.1
Ubuntu 8.04 LTS
libvorbis0a - 1.2.0.dfsg-2ubuntu0.2

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

After a standard system upgrade you need to restart any applications that use libvorbis, such as Totem and gtkpod, to effect the necessary changes.

References