Secunia Security Advisory – Ubuntu has issued an update for libgd2. This fixes a vulnerability, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise an application using the library.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82534/sa37301.txt
Source: https://packetstormsecurity.com/files/82534/Secunia-Security-Advisory-37301.html