Secunia Security Advisory – Ubuntu has issued an update for apache2. This fixes a weakness, 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/79224/sa35823.txt
Source: https://packetstormsecurity.com/files/79224/Secunia-Security-Advisory-35823.html