Secunia Security Advisory – Ubuntu has issued an update for quagga. This fixes some vulnerabilities, which can be exploited by malicious users to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59341/sa26829.txt
Source: https://packetstormsecurity.com/files/59341/Secunia-Security-Advisory-26829.html