Secunia Security Advisory – Ubuntu has issued an update for avahi. This fixes multiple 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/94421/sa41660.txt
Source: https://packetstormsecurity.com/files/94421/Secunia-Security-Advisory-41660.html