Secunia Security Advisory – Fedora has issued an update for ssmtp. This fixes a weakness, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92784/sa41009.txt
Source: https://packetstormsecurity.com/files/92784/Secunia-Security-Advisory-41009.html