USN-1855-1: libxcb vulnerability

5 June 2013

libxcb vulnerability

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

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Several security issues were fixed in libxcb.

Software Description

  • libxcb - X C Binding


Ilja van Sprundel discovered multiple security issues in various libraries and components. An attacker could use these issues to cause applications to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 13.04
libxcb1 - 1.8.1-2ubuntu2.1
Ubuntu 12.10
libxcb1 - 1.8.1-1ubuntu1.1
Ubuntu 12.04 LTS
libxcb1 - 1.8.1-1ubuntu0.2
Ubuntu 10.04 LTS
libxcb1 - 1.5-2ubuntu0.1

To update your system, please follow these instructions:

After a standard system update you need to restart your session to make all the necessary changes.