The remote host is vulnerable to a flaw in the way that it parses HTTP requests.
The remote host appears to be running a version of Apache, an open source web server. This version of Apache is vulnerable to a flaw in the way that it handles malformed HTTP requests. An attacker exploiting this flaw would be able to possibly corrupt cache memory or inject HTML requests to a vulnerable Apache server. The vulnerability stems from a non-conformance to RFC 2616 that states that HTTP requests must not include both a 'Content-Length' and 'Transfer-Encoding' field.