source: http://www.securityfocus.com/bid/9390/info

It has been reported that FreeWeb server of FreeProxy may be prone to a denial of service vulnerability that may allow an attacker to crash the server process by supplying a malformed HTTP request. The issue exists in the 'CreateFile' function of the web server.

FreeProxy versions 3.6 and prior are reported to be prone to this issue.

GET AAA HTTP/1.0