Secunia Security Advisory – Red Hat has issued an update for libpng. This fixes a vulnerability, which can be exploited by malicious people to cause a DoS (Denial of Service) against applications using libpng or potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/43846/sa18863.txt
Source: https://packetstormsecurity.com/files/43846/Secunia-Security-Advisory-18863.html