Secunia Security Advisory – Ubuntu has issued an update for ipsec-tools. 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/41988/sa17822.txt
Source: https://packetstormsecurity.com/files/41988/Secunia-Security-Advisory-17822.html