bugtraq - Mambo Open Source Multiple Vulnerabilities

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Date: 16 Mar 2004 04:17:25 -0000
From: JeiAr <security@...ftech.org>
To: bugtraq@...urityfocus.com
Subject: Mambo Open Source Multiple Vulnerabilities

Vendor  : Mambo Open Source
URL     : http://www.mamboserver.com
Version : Mambo Open Source 4.5 Stable 1.0.3 && Earlier
Risk    : Multiple Vulnerabilities

Description:
Mambo Open Source is the finest open source Web Content Management System 
available today. Mambo Open Source makes communicating via the Web easy. 
Have you always wanted to have your own site but never understood how? Well 
Mambo Open Source is just the ticket! With Mambo Open Source there is no 
need for HTML, XML or DHTML skills, just enter your content, add a picture 
and then through the easy to use administrator web-interface ...click 
Publish! Simple ... Quick ... And easy! With the in-built editor Mambo Open 
Source allows you to design and create your content without the need for HTML 
code. Maintaining a website has never been easier. 

Cross Site Scripting:
There are a few variables that will allow for XSS (cross site scripting) on 
most pages of a Mambo Open Source Installation. The variables in question are 
"return", and the "mos_change_template" variable. Below are some examples of 
these mentioned XSS problems in action.

index.php?return=[XSS]
index.php?mos_change_template=[XSS]

The "return" variable is just the contents of the url, so it allows you to 
pass pretty much any junk to the url and have it printed straight to the page 
without being validated. This takes place on almost EVERY page within MOS

SQL Injection && Query Tampering:
It is possible for an attacker or malicious user to influence SQL queries by 
altering the "id" variable. The below examples is not malicious so they will 
just trigger an error. The query gets passed near 

"SELECT title FROM mos_categories WHERE id=[SQL]" in "pathway.php"

Please note that this vuln is also likely to exist in other places as well.

[VID] = A vaild id relating to the resource
[SQL] = An SQL query that's to be executed 

index.php?option=content&task=view&id=[SQL]&Itemid=[VID]
index.php?option=content&task=category&sectionid=[VID]&id=[SQL]&Itemid=[VID]
index.php?option=content&task=category&sectionid=[VID]&id=[SQL]&Itemid=[VID]

------[ Start Example Of Vuln Code ]------------------------------------------

if ($id) {
	$database->setQuery( "SELECT title FROM #__categories WHERE id=$id" );
	$title = $database->loadResult();
	echo $database->getErrorMsg();

	$id = max( array_keys( $mitems ) ) + 1;
	$mitem = pathwayMakeLink(
	$id,
	$title,
	"index.php?option=$option&amp;task=$task&amp;id=$id&amp;Itemid=$Itemid",
	$Itemid
	);
	$mitems[$id] = $mitem;
	$Itemid = $id;
}

------[ Ends Example Of Vuln Code ]-------------------------------------------

As you can see in this code snip from pathway.php, the variable $id is passed 
directly into the query without any sort of real validation. This is however 
resolved in the newly updated version of Mambo Open Source by requiring $id to be 
validated via the intval() function. That way it only returns a valid integer and 
thus prevents SQL injection from happening.

Solution:
Special thanks goes to Robert Castley for his very prompt, and professional response, 
and for the genuine concern regarding the security of Mambo Open Source server. A new 
version of the Mambo Open Source package is now available from their official website
and should be applied soon as possible. Advisory @ http://www.gulftech.org/03162004.php

Credits:
Credits go to JeiAr of the GulfTech Security Research Team.