Buffer overflow in Mercury Mail Transport System 4.01b allows remote attackers to execute arbitrary code via a long request to TCP port 105.
https://www.exploit-db.com/exploits/1375
https://exchange.xforce.ibmcloud.com/vulnerabilities/23669
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-4406
http://www.securityfocus.com/bid/16396