Secunia Security Advisory – Ubuntu has issued an update for libxml2. This fixes some vulnerabilities, which can be exploited by malicious people to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/80384/sa36274.txt
Source: https://packetstormsecurity.com/files/80384/Secunia-Security-Advisory-36274.html