[HSC] Multiple CSRF in Joomla all versions - Complete compromise


Hackers Center Security Group (http://www.hackerscenter.com)
Credit: Armando Romeo aka Zinho


Class: CSRF
Remote: Yes
Risk: HIGH

Product: Joomla
Version: All (1.0.13 and 1.5 rc3 tested)
Vendor: http://www.joomla.com
Patch: Joomla 1.5 RC4



"Joomla! is one of the most powerful Open Source Content Management 
Systems on the planet. It is used all over the world for everything
from simple websites to complex corporate applications. Joomla! is easy 
to install, simple to manage, and reliable"



Joomla is vulnerable to CSRF attacks into all of its released versions 
including the RC3 of 1.5.


+] Affected areas

-Users
The attack allows everyone (no privileges needed) to add a new Super 
Admin by just having a Super Admin visiting a url

-Extension installation
The attack allow everyone (no privileges needed) to upload an extension 
from a remote location, thus having malicious PHP scripts on server.
Read PHP shell.

-Global configuration
The attack allows everyone (no privileges needed) to change all the 
aspects of the site main configuration, including database configuration.

Defacement or complete portal compromise is possible including having 
access to the database.


+] Notes

Joomla has been contacted on 12/4/2007. Fast and professional response 
was given. Patched in SVN 4 days later and then with the RC4 release.
Time to face CSRF, community!

+] Patch

Patch of the above vulnerabilities is included into the RC4 release of 
Joomla 1.5
As far as I know 1.0 has not been fixed so all the 1.0.x versions are 
vulnerable and unpatched,
that's why I'm not including a POC here.

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-- 
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Zinho

Webmaster and Founder 

Hackers Center 
Internet Security Portal
www.hackerscenter.com