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Joomla 2.5.4 Cross Site Scripting

Joomla 2.5.4 Cross Site Scripting
Posted May 3, 2012
Authored by Janek Vind aka waraxe | Site waraxe.us

Joomla version 2.5.4 suffers from a cross site scripting vulnerability in the administrative sysinfo page.

tags | exploit, xss
advisories | CVE-2012-2412
SHA-256 | d3e0916a3d65dc13f3285d97784500de31ef52e38715fbb01563ab87c0892607

Joomla 2.5.4 Cross Site Scripting

Change Mirror Download

[waraxe-2012-SA#088] - Reflected XSS in Joomla 2.5.4 admin sysinfo page
===============================================================================

Author: Janek Vind "waraxe"
Date: 03. May 2012
Location: Estonia, Tartu
Web: http://www.waraxe.us/advisory-88.html
CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2412

Description of vulnerable software:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Joomla is one of the world's most popular open source CMS (content management
system). With millions of websites running on Joomla, the software is used by
individuals, small & medium-sized businesses, and large organizations worldwide
to easily create & build a variety of websites & web-enabled applications.


Vulnerable versions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Affected is Joomla version 2.5.4, older versions may be vulnerable as well.

###############################################################################
1. Reflected XSS in Joomla 2.5.4 admin sysinfo page
###############################################################################

CVE Information:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2012-2412 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

Vulnerability Details:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reason: outputting html data without proper encoding
Attack vector: user-provided User-Agent string
Preconditions:
1. target victim must be logged in as admin
Result: XSS attack possibilities


Source code snippet from "sysinfo.php":
-----------------[ source code start ]---------------------------------
function &getInfo()
{
..
$this->info['useragent'] = $_SERVER['HTTP_USER_AGENT'];
-----------------[ source code end ]-----------------------------------


Source code snippet from "default_system.php":
-----------------[ source code start ]---------------------------------
<td>
<?php echo $this->info['useragent'];?>
</td>
-----------------[ source code end ]-----------------------------------

As seen above, user-provided User-Agent string is used for outputting html.
No data sanitization, which indicates Reflected XSS vulnerability issue.


Disclosure Timeline:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

20.04.2012 Developers contacted via email, no response
24.04.2012 CVE identifier request
25.04.2012 Got CVE identifier
26.04.2012 Second attempt contacting developers via email, no response
03.05.2012 Advisory published


Contact:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

come2waraxe@yahoo.com
Janek Vind "waraxe"

Waraxe forum: http://www.waraxe.us/forums.html
Personal homepage: http://www.janekvind.com/
Random project: http://albumnow.com/
---------------------------------- [ EOF ] ------------------------------------
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