USN-640-1: libxml2 vulnerability

Ubuntu Security Notice USN-640-1

3rd September, 2008

libxml2 vulnerability

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.06 LTS

Software description

  • libxml2


Andreas Solberg discovered that libxml2 did not handle recursive entities
safely. If an application linked against libxml2 were made to process
a specially crafted XML document, a remote attacker could exhaust the
system's CPU resources, leading to a denial of service.

Update instructions

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

Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.1
Ubuntu 7.10:
libxml2 2.6.30.dfsg-2ubuntu1.2
Ubuntu 7.04:
libxml2 2.6.27.dfsg-1ubuntu3.2
Ubuntu 6.06 LTS:
libxml2 2.6.24.dfsg-1ubuntu1.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.