This host is running Null HTTPd Server and is prone to heap based buffer overflow vulnerability.
Successful exploitation will allow attacker to execute arbitrary code on the target system or cause the web server to crash. Impact Level: Application
Upgrade Null HTTPd Server to 0.5.1 or later, For updates refer to http://freecode.com/projects/nullhttpd
Improper way of handling of negative 'Content-Length' values in HTTP header field, leads to a buffer overflow. By sending an HTTP request with a negative value in the 'Content-Length' header field, a remote attacker could overflow a buffer and cause the server to crash or execute arbitrary code on the system.
Null HTTPd Server version 0.5.0 or prior