The host is running Blackmoon FTP Server and is prone to denial of service vulnerability.
Successful exploitation will allow the remote attackers to cause a denial of service. Impact Level: Application
Upgrade to Blackmoon FTP Version 3.1.7 Build 17356 or higher. For updates refer to http://www.blackmoonftpserver.com/downloads.aspx
The flaw is due to an error while parsing PORT command, which can be exploited to crash the FTP service by sending multiple PORT commands with 'big' paramter.
Blackmoon FTP 3.1.6 - Build 1735