Core FTP Server 1.2 before build 515 allows remote authenticated users to obtain sensitive information (password for the previous user) via a USER command with a specific length, possibly related to an out-of-bounds read.
http://coreftp.com/forums/viewtopic.php?t=2985707
http://packetstormsecurity.com/files/125073/Core-FTP-Server-1.2-DoS-Traversal-Disclosure.html
http://seclists.org/fulldisclosure/2014/Feb/39