source: https://www.securityfocus.com/bid/9642/info

Monkey HTTP Daemon is prone to a denial of service attacks. HTTP GET requests, which do not include a 'Host' header field, will trigger this condition.

The server will need to be restarted to regain normal functionality.

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/23686.rar