Mandriva Linux Security Advisory MDKSA-2006-156 – Moritz Jodeit discovered a vulnerability in sendmail when processing very long header lines that could be exploited to cause a Denial of Service by crashing sendmail.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/49691/MDKSA-2006-156.txt
Source: https://packetstormsecurity.com/files/49691/Mandriva-Linux-Security-Advisory-2006.156.html