Buffer overflow in Elm 2.5.5 and earlier allows remote attackers to execute arbitrary code via a long Message-ID header.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6852
http://www.redhat.com/support/errata/RHSA-2001-091.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-067.php