[VulnWatch] KPMG-2002034: Jigsaw Webserver DOS device DoS

From: Peter Gründl (pgrundl@kpmg.dk)
Date: 07/17/02

From: Peter Gründl <pgrundl@kpmg.dk>
To: "vulnwatch" <vulnwatch@vulnwatch.org>
Date: Wed, 17 Jul 2002 11:36:33 +0200


Title: Jigsaw Webserver DOS device DoS

BUG-ID: 2002034
Released: 17th Jul 2002

A malicious user can tie up working threads on the web server. when
the web server runs out of working threads, the web server will no
longer service web requests.

- Jigsaw V2.2.1 Distribution on Windows 2000 Server

Not Vulnerable:
- Jigsaw V2.2.1 Dev/2.2/20020711 on Windows 2000 Server

Product Description:
Quoted from the vendor webpage:

"Jigsaw is W3C's leading-edge Web server platform, providing a sample
 HTTP 1.1 implementation and a variety of other features on top of an
 advanced architecture implemented in Java. The W3C Jigsaw Activity
 statement explains the motivation and future plans in more detail.
 Jigsaw is an W3C Open Source Project, started May 1996."

Requests for /servlet/con never times out, and approximately 30 of
these requests is enough to tie up all working threads on the server.
The service needs to be restarted to recover.

Vendor URL:
You can visit the vendor webpage here: http://www.w3.org

Vendor response:
The vendor was notified on the 27nd of May, 2002. On the 12th of
July we verified that the problem was corrected in the latest build

Corrective action:
Upgrade to a newer version. This issue was first resolved in build
s020711, available here: http://www.caucho.com/download/index.xtp

Author: Peter Gründl (pgrundl@kpmg.dk)

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