Xeneo Web Server 2.2.9.0 Denial Of Service Vulnerability

["badpack3t" <badpack3t () security-protocols com>]

SP Research Labs Advisory x03
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www.security-protocols.com

Product - Xeneo Web Server 2.2.9.0

Download it here:
http://www.northernsolutions.com/index.php?view=product&id=1

Date Released - 04/21/2003

Release Mode - Vendor was notified on 3/18/2003.  Sent a few emails but
never got any replies.  So here it goes.

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Product Description from the vendor -

Xeneo Web Server is designed to deliver high performance and
reliability. It can be easily extended and customized to host
everything from a personal web site to advanced web applications
that use ASP, PHP, ColdFusion, Perl, CGI and ISAPI.  Key Xeneo
Web Server features include: multiple domain support, integrated
Windows authentication, scripting interface, enhanced filter
support, ISAPI, CGI, ASP, SSL, intelligent file caching and more.

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Vulnerability Description -

To exploit this vulnerability, simply do a GET / with 4096 ?'s or  more
will cause the web server to go down.  It is not exploitable at this
point.

Tested on:

Windows XP Pro SP1
Windows 2000 SP3

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proof of concept is attached.

peace out,

badpack3t
www.security-protocols.com

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Attachment: sp-xeneo.pl
Description: