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ECHU Alert #3 : Meunity 1.1 script injection vulnerability
From: das () echu org
Date: Mon, 14 Oct 2002 21:54:15 +0200


----------------------------------------------
| Meunity 1.1 script injection vulnerability |
----------------------------------------------


PROGRAM: Meunity Community System
VULNERABLE VERSIONS: all
IMMUNE VERSIONS: none
SEVERITY: really high


Tested version
==============
Meunity Community System 1.1 (stable) Released with IE 5/5.5/6 and AOL.


Description
============ 
"Meunity is a sophisticated Web-based community system that uses PHP. It is object oriented, so it is easily 
extendible. Its database abstraction layer allows it to be compatible with multiple databases." - sourceforge.net
In fact Meunity is a quick and simple CMS with a few options, in this options there's a forum.

There's a vulnerability in the forum that allow a badly disposed member to execute code. The problem appears when a 
user post in the forum, a vulnerability exists in this CMS that allow a badly disposed member to perform a typical IMG 
attack against visitors :

<IMG SRC="javascript:alert('unsecure')"> 


The problem
=========== 
A badly disposed member can post a topic containing malicious code and as soon as somebody see this topic the code will 
be executed on his workstation.


Vendors status
==============
I contacted Zack Coburn (Meunity developper) via sourceforge.net one week ago but I had no answer back.


Solution
========
There's no secure release of Meunity Community System, so the unique solution is, at this moment, to disallow posting 
in Meunity forum to avoid the problem. Hope that Zack Coburn will release a new immune version as soon as possible.


Links
=====
http://meunity.sourceforge.net/
http://sourceforge.net/projects/meunity/


This vulnerability's orginal paper can be found here: http://www.echu.org/modules/news/article.php?storyid=132


David Suzanne (aka dAs)
das () echu org
http://www.echu.org 


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