It indicates a possible attempt of a Buffer Overflow attack against a WS_FTP Server. Multiple vulnerabilities exist in Ipswitch WS_FTP Server 4.0.2 which could lead to the execution of arbitrary code. A remote authenticated user could cause a large error string to be the ALLO handler or FTP administrators could cause a long hostname or username to be inserted into a reply to a STAT command while a file is being transferred.
WS_FTP Server 4.x and earlier versions.
Compromise of the affected system.
Apply appropriate patch from the vendor or Upgrade to non-vulnerable version if available.