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Pligg Auto-Voter Using XSS to Bypass CSRF Protection
michaelbrooks
rooksecurity.com
Date: Fri Aug 01 2008 - 19:04:40 CDT
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Explanation:
Pligg Suffers from a Reflective Cross Site Scripting vulnerability in index.php. For the $_GET['category'] variable. Exploit code was written that uses this flaw to bypass the CSRF protection to then vote on any pligg article of the attackers choosing. I took inspiration from the Myspace Sammy worm utilizing XMLHttpRequest() to read the randomly generated token protection requests from forgery. This is a more serious attack when combined with my Captcha Implementation Bypass (http://www.rooksecurity.com/blog/?p=17) which allows an attacker to create new user accounts.
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