[SCAN Associates Sdn Bhd Security Advisory] Foxweb 2.5 bufferoverflow in CGI and ISAPI extension

[pokleyzz <pokleyzz () scan-associates net>]

SCAN Associates Sdn Bhd Security Advisory

Products: Foxweb 2.5 (http://www.foxweb.com)
Date: 5th September 2003
Author: pokleyzz <pokleyzz_at_scan-associates.net>
Contributors:
   sk_at_scan-associates.net
   shaharil_at_scan-associates.net
   munir_at_scan-associates.net
URL: http://www.scan-associates.net

Summary:  Foxweb 2.5 buffer in foxweb CGI and ISAPI extension

Description
========
FoxWeb is a Web application development tool, which can be used to 
quickly and easily integrate your FoxPro and client-server databases 
with the
Web and to build interactive Web applications for intranets or the 
Internet. Take advantage of the fastest PC-based database engine and 
ease of use
of Visual FoxPro to create dynamic Web content. Whether you are a 
seasoned developer or a "newbie," FoxWeb provides the tools and resources
to help you create interactive applications in less time and with less 
effort.

Details
======
There is buffer overflow in PATH_INFO for foxweb.dll and foxweb.exe  
from foxweb 2.5. It will occur when user suppy overlong PATH_INFO
(over 3000 byte).
ex:
   http://www.com/scripts/foxweb.dll/[3000 A's]

This stackbase overflow is easy to exploit and may lead to command 
execution as webuser.

Proof  of concept
============
[see attachment]

Vendor Response
============
Vendor has been contacted on  28th July 2003 and patch is available.

Attachment: bazooka_penaka.pl
Description: