Secunia Security Advisory – Trustix has issued an update for netpbm. 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/47609/sa20775.txt
Source: https://packetstormsecurity.com/files/47609/Secunia-Security-Advisory-20775.html

