Secunia Security Advisory – Debian has issued an update for sendmail. This fixes a vulnerability, which can be exploited by malicious people to conduct spoofing attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85836/sa38314.txt
Source: https://packetstormsecurity.com/files/85836/Secunia-Security-Advisory-38314.html