[NT] TinyWeb Server Denial of Service Vulnerability

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To: list@securiteam.com
Date: 9 Oct 2003 17:39:56 +0200

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  TinyWeb Server Denial of Service Vulnerability
------------------------------------------------------------------------

SUMMARY

 <http://www.ritlabs.com/tinyweb/> TinyWeb is "extremely small (executable
file size is 53K), simple (no configuration other than through the command
line) and fast (consumes minimum of system resources) Win32 daemon for
regular (TCP/http) and secure (SSL/TLS/https) web servers".

A vulnerability in the product allows remote attackers to cause the server
to crash by sending it a special request.

DETAILS

Vulnerable systems:
 * TinyWeb version 1.9

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

ADDITIONAL INFORMATION

The information has been provided by <mailto:vulncode@yahoo.com> Ziv
Kamir.

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