Secunia Security Advisory – Red Hat 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/87914/sa39234.txt
Source: https://packetstormsecurity.com/files/87914/Secunia-Security-Advisory-39234.html