Secunia Security Advisory – FreeBSD has issued an update for ntpd. 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/85253/sa38123.txt
Source: https://packetstormsecurity.com/files/85253/Secunia-Security-Advisory-38123.html