Secunia Security Advisory – Ubuntu has issued an update for bzip2. This fixes a vulnerability, 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/64892/sa29506.txt
Source: https://packetstormsecurity.com/files/64892/Secunia-Security-Advisory-29506.html