Secunia Security Advisory – Fedora 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/90964/sa40189.txt
Source: https://packetstormsecurity.com/files/90964/Secunia-Security-Advisory-40189.html