[NT] Webbsyte Chat DoS Vulnerability

From: SecuriTeam (support_at_securiteam.com)
Date: 08/04/04

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Date: 4 Aug 2004 01:05:55 +0200

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      Webbsyte Chat DoS Vulnerability
    ------------------------------------------------------------------------

    SUMMARY

     <http://sourceforge.net/projects/wchat/> Webbsyte Chat "lets you keep in
    touch with people all around the world".

    Webbsyte char server is vulnerable to a denial of service vulnerability
    which is exhibited by a server crash that can be triggered by any remote
    attacker.

    DETAILS

    Vulnerable Systems:
     * Webbsyte Chat version 0.9.0

    The chat server doesn't correctly manage raw requests, in fact it will
    crash with the following error:
    "Run-time error '40006':
    Wrong protocol or connection state for the requested transaction or
    request"

    What triggers the vulnerability are mere 40 simultaneous raw connections
    to the server. No more than 40 simulataneous connections are needed in
    order to bring down the server with the above mentioned error.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:fdonato@autistici.org>
    Donato Ferrante.

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