The remote host is vulnerable to a buffer overflow.
The remote host is running Cerbere Proxy Server, a HTTP/FTP proxy server for Windows operating systems. It is reported that versions up to and including 1.2 are vulnerable to a remote denial of service in the 'Host:' HTTP field processing. An attacker may craft a malicious HTTP request with a large 'Host:' field to deny service to legitimate users.
No solution is known at this time.