=========================================================================Ubuntu Security Notice USN-1855-1
June 05, 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

Summary:

Several security issues were fixed in libxcb.

Software Description:
- libxcb: X C Binding

Details:

Ilja van Sprundel discovered multiple security issues in various X.org
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

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

References:
  https://ubuntu.com/security/notices/USN-1855-1
  CVE-2013-2064

Package Information:
  https://launchpad.net/ubuntu/+source/libxcb/1.8.1-2ubuntu2.1
  https://launchpad.net/ubuntu/+source/libxcb/1.8.1-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/libxcb/1.8.1-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/libxcb/1.5-2ubuntu0.1