Ubuntu Security Notice USN-2214-2
9th June, 2014
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
- Ubuntu 13.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
USN-2214-1 introduced a regression in libxml2.
- libxml2 - GNOME XML library
USN-2214-1 fixed vulnerabilities in libxml2. The upstream fix introduced a
regression when using xmllint with the --postvalid option. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Daniel Berrange discovered that libxml2 would incorrectly perform entity
substitution even when requested not to. If a user or automated system were
tricked into opening a specially crafted document, an attacker could
possibly cause resource consumption, resulting in a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 14.04 LTS:
- libxml2 2.9.1+dfsg1-3ubuntu4.2
- Ubuntu 13.10:
- libxml2 2.9.1+dfsg1-3ubuntu2.2
- Ubuntu 12.04 LTS:
- libxml2 2.7.8.dfsg-5.1ubuntu4.8
- Ubuntu 10.04 LTS:
- libxml2 2.7.6.dfsg-1ubuntu1.12
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.