USN-1376-1: libxml2 vulnerability

Ubuntu Security Notice USN-1376-1

27th February, 2012

libxml2 vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 8.04 LTS


libxml2 could be made to cause a denial of service by consuming excessive CPU resources.

Software description

  • libxml2 - GNOME XML library


Juraj Somorovsky discovered that libxml2 was vulnerable to hash table
collisions. If a user or application linked against libxml2 were tricked
into opening a specially crafted XML file, an attacker could cause a
denial of service.

Update instructions

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

Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.2
Ubuntu 11.04:
libxml2 2.7.8.dfsg-2ubuntu0.3
Ubuntu 10.10:
libxml2 2.7.7.dfsg-4ubuntu0.4
Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.4
Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.8

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make
all the necessary changes.