Ubuntu Security Notice USN-673-1
18th 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 version:
- 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.