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vBulletin BBCode IMG Tag Cross-Site Request Forgery Advisory Available in Danish 

Secunia Advisory: SA16516  
Release Date: 2005-08-24
Last Update: 2005-09-13

Critical:
Less critical
Impact: Hijacking
Where: From remote
Solution Status: Partial Fix

Software:vBulletin 3.x



Description:
A vulnerability has been discovered in vBulletin, which can be exploited by malicious users to conduct cross-site request forgery attacks.

The vulnerability is caused due to the application allowing users to perform certain actions via HTTP GET requests without performing any validity checks to verify the user's request. This can be exploited by a non-privileged user to gain escalated privileges when a logged in administrative user views a malicious forum post containing an image link that causes the administrative user's browser to load an URL that performs certain administrative actions (e.g. lifting a ban).

The vulnerability has been confirmed in version 3.0.7. Other versions may also be affected.

Solution:
Update to version 3.0.9.
http://www.vbulletin.com/download.php

The updated version changes the request method for certain administrative actions. It does not remove the cross-site request forgery issue it self.

Provided and/or discovered by:
h4cky0u and y3dips.

Changelog:
2005-09-13: Updated "Solution" section.

Original Advisory:
h4cky0u:
http://lists.grok.org.uk/pipermail/full-disclosure/2005-August/036348.html

ECHO.or.id:
http://echo.or.id/adv/adv23-y3dips-2005.txt



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

19 Related Secunia Security Advisories, displaying 10

1. vBulletin Private Message Subject Script Insertion
2. vBulletin Two Script Insertion Vulnerabilities
3. vBulletin MCP Cross-Site Scripting Vulnerability
4. vBulletin Cross-Site Scripting Vulnerability
5. vBulletin Script Insertion Vulnerabilities
6. vBulletin "Attached Before" and "Attached After" SQL Injection
7. vBulletin "postids" SQL Injection Vulnerability
8. vBulletin "Attachment Manager" Cross-Site Scripting
9. vBulletin "prefs" / "navprefs" Cross-Site Scripting Vulnerabilities
10. vBulletin Cross-Site Scripting and Script Insertion

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