Joomla! Input Validation Hole Permits Cross-Site Request Forgery Attacks
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SecurityTracker Alert ID: 1019145
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SecurityTracker URL: http://securitytracker.com/id?1019145
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CVE Reference: CVE-2007-6642
, CVE-2007-6643
, CVE-2007-6644
, CVE-2007-6645
(Links to External Site)
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Updated: Jan 4 2008
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Original Entry Date: Dec 27 2007
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Impact: Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 1.5 RC3 and prior versions
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Description: Armando Romeo (aka Zinho) from Hackers Center Security Group reported a vulnerability in Joomla!. A remote user can conduct cross-site request forgery attacks to gain administrative privileges.
Several administrative components do not properly filter HTML code from user-supplied input before displaying the input. A remote
user can create a specially crafted URL that, when loaded by a target authenticated administrator, will cause arbitrary requests
to be executed by the target user's browser. The requests can take actions on the site acting as the target administrator.
This
can be exploited to modify the application's configuration. This can also be exploited to upload arbitrary PHP code and subsequently
execute arbitrary commands on the target system.
The vendor separately reported other vulnerabilities: A remote authenticated
user can gain elevated privileges; A fixed administrator can include other users in the administrator group; a remote user can conduct
cross-site scripting attacks via com_poll.
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Impact: A remote user can take actions on the site acting as the target administrative user, including modifying the application's configuration or database and uploading and executing arbitrary PHP code.
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Solution: The vendor has issued a fixed version (1.5 RC4).
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Vendor URL: www.joomla.org/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: Zinho <zinho@hackerscenter.com>
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Message History:
None.
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Source Message Contents
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Date: Thu, 27 Dec 2007 20:40:42 +0100
From: Zinho <zinho@hackerscenter.com>
Subject: [HSC Security Group] Multiple CSRF in Joomla all versions - Complete
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[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.
http://kit.hackerscenter.com - The most comprehensive security pack you
will ever find on the net!
--
----
Zinho
Webmaster and Founder
Hackers Center
Internet Security Portal
www.hackerscenter.com
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