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
Details
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: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.