Secunia Security Advisory – IBM has acknowledged a vulnerability in sendmail in AIX, 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/87190/sa38883.txt
Source: https://packetstormsecurity.com/files/87190/Secunia-Security-Advisory-38883.html