Secunia Security Advisory – Debian has issued an update for expat. 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/82552/sa37193.txt
Source: https://packetstormsecurity.com/files/82552/Secunia-Security-Advisory-37193.html