Helmsman Research (aka CoolUtils) HomeFtp 1.1 allows remote attackers to cause an unspecified denial of service via a long USER command combined with a long PASS command and an NLST command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24152
http://www.securityfocus.com/bid/16238
http://www.securityfocus.com/archive/1/421869/100/0/threaded