USN-1094-1: Libvirt vulnerability

29 March 2011

libvirt vulnerability

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10


An attacker could send crafted input to libvirt and cause it to crash.

Software Description

  • libvirt - Libvirt virtualization toolkit


Petr Matousek discovered that libvirt did not always honor read-only connections. An attacker who is authorized to connect to the libvirt daemon could exploit this to cause a denial of service via application crash.

Update instructions

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

Ubuntu 10.10
libvirt0 - 0.8.3-1ubuntu14.1
Ubuntu 10.04 LTS
libvirt0 - 0.7.5-5ubuntu27.9
Ubuntu 9.10
libvirt0 - 0.7.0-1ubuntu13.3

To update your system, please follow these instructions:

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