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From: Peter Gründl (pgrundl_at_kpmg.dk)
Date: Wed Jul 17 2002 - 04:36:33 CDT

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    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 (pgrundlkpmg.dk)

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