USN-673-1: libxml2 vulnerabilities

19 November 2008

libxml2 vulnerabilities

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

  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software Description

  • libxml2

Details

Drew Yao discovered that libxml2 did not correctly handle certain corrupt XML documents. If a user or automated system were tricked into processing a malicious XML document, a remote attacker could cause applications linked against libxml2 to enter an infinite loop, leading to a denial of service. (CVE-2008-4225)

Drew Yao discovered that libxml2 did not correctly handle large memory allocations. If a user or automated system were tricked into processing a very large XML document, a remote attacker could cause applications linked against libxml2 to crash, leading to a denial of service. (CVE-2008-4226)

Update instructions

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

Ubuntu 8.10
libxml2 - 2.6.32.dfsg-4ubuntu1.1
Ubuntu 8.04 LTS
libxml2 - 2.6.31.dfsg-2ubuntu1.3
Ubuntu 7.10
libxml2 - 2.6.30.dfsg-2ubuntu1.4
Ubuntu 6.06 LTS
libxml2 - 2.6.24.dfsg-1ubuntu1.4

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to restart your sessions to effect the necessary changes.

References