Conti FtpServer 1.0 allows remote authenticated users to cause a denial of service (daemon crash) via a certain string containing "//A:" in the argument to the LIST command.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35106
http://www.securityfocus.com/bid/24672
http://www.securityfocus.com/archive/1/472346/100/0/threaded