From: Secunia Security Advisories (sec-advsecunia.com)
Date: Wed Aug 24 2005 - 08:23:54 CDT

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TITLE:
vBulletin BBCode IMG Tag Cross-Site Request Forgery

SECUNIA ADVISORY ID:
SA16516

VERIFY ADVISORY:
http://secunia.com/advisories/16516/

CRITICAL:
Less critical

IMPACT:
Hijacking

WHERE:
From remote

SOFTWARE:
vBulletin 3.x
http://secunia.com/product/3212/

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:
Disallow image links in forum postings.

PROVIDED AND/OR DISCOVERED BY:
h4cky0u and y3dips.

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

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About:
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