Secunia Security Advisory – Ubuntu has issued an update for netpbm-free. This fixes a vulnerability, which can be exploited by malicious people to compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/89076/sa39639.txt
Source: https://packetstormsecurity.com/files/89076/Secunia-Security-Advisory-39639.html