Denial of Service in TinyWeb Web Server for Windows

Reported October 9, 2003 by Ziv Kamir.

VERSIONS AFFECTED

Ritlabs TinyWeb 1.9

DESCRIPTION

A Denial of Service (DoS) vulnerability exists in Ritlabs TinyWeb 1.9. By sending a specially formed HTTP GET request, an attacker can crash the server.

DEMONSTRATION

The discoverer posted the following demonstration as proof of concept:

A remote user can issue an HTTP GET request for /cgi-bin/.%00./dddd.html and cause the server to consume large amounts of CPU time (88%-92%)

VENDOR RESPONSE

Ritlabs has been notified.

CREDIT                                                                                                       

Discovered by Ziv Kamir.