Multiple buffer overflows in Hypermail 2 before 2.1.6 allows remote attackers to cause a denial of service and possibly execute arbitrary code (1) via a long attachment filename that is not properly handled by the hypermail executable, or (2) by connecting to the mail CGI program from an IP address that reverse-resolves to a long hostname.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11158
https://exchange.xforce.ibmcloud.com/vulnerabilities/11157
http://www.securityfocus.com/bid/6690
http://www.securityfocus.com/bid/6689
http://www.debian.org/security/2003/dsa-248
http://secunia.com/advisories/8030
http://marc.info/?l=bugtraq&m=104369136703903&w=2
http://archives.neohapsis.com/archives/vulnwatch/2003-q1/0042.html