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Pimcore v3.0 & v2.3.0 CMS - SQL Injection Vulnerability



Document Title:
===============
Pimcore v3.0 & v2.3.0 CMS - SQL Injection Vulnerability


References (Source):
====================
http://vulnerability-lab.com/get_content.php?id=1363


Release Date:
=============
2014-12-16


Vulnerability Laboratory ID (VL-ID):
====================================
1363


Common Vulnerability Scoring System:
====================================
6.4


Product & Service Introduction:
===============================
Pimcore is a powerful and robust Zend Framework based PHP content management system (CMS) for creating and managing digital 
content and assets licensed under the open-source BSD license. Create outstanding digital experiences on the most flexible 
content management platform available. Manage and edit any type of digital content, for any device and channel in a 100% 
flexible and personalized way. Pimcore features award-winning single-source and multi-channel publishing functionality 
making it easy to manage, update, and integrate content and data from various sources. With pimcore brands can create 
and manage rich digital experiences for all of their output channels at once: web, mobile, apps, social platforms, 
print and digital signage. With pimcore you can truly `edit once & reuse anywhere`.

(Copy of the Homepage: https://www.pimcore.org/ )



Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered a sql injection vulnerability in the official Pimcore v3.0 & v2.3.0 Content Management System (Web-Application).


Vulnerability Disclosure Timeline:
==================================
2014-12-16:	Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Pimcore GmbH
Product: PimCore - Content Management System 3.0 Release Candidate & 2.3.0


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


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


Technical Details & Description:
================================
A remote sql injection web vulnerability has been discovered in the official Pimcore v3.0 & v2.3.0 Content Management System. 
The vulnerability allows remote attackers and local privileged user accounts to  inject own sql commands to compromise 
the web-server dbms of pimcore.

The security vulnerability is located in the name value GET method request of the pimcore mysql module.  Remote attackers 
and local privileged user accounts are able to compromise the application service by injection of malicious sql commands. The request 
method to inject the code is GET and the attack vector is on the application-side of the modules. Remote attackers are able to use the 
inner application functions of the class module to perform an execution on the application-side unauthorized through the admin acp. 

The security risk of the sql vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.4.
Exploitation of the remote sql injection web vulnerability requires no privileged application user account or a low privileged 
user account without user interaction. Successful exploitation of the sql injection vulnerability results in application and 
web-service or dbms compromise.

Request Method(s):
				[+] GET

Vulnerable Module(s):
				[+] backup/mysql

Vulnerable Parameter(s):
				[+] name


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

PoC: 
./backup/mysql?_dc=1415886023081&name=-1%27[SQL INJECTION VULNERABILITY!]--&type=BASE%20TABLE


--- PoC Session Logs [GET] ---
Status: 200[OK]
GET http://pimcore.localhost:8080/admin/backup/mysql?_dc=1415886023081&name=-1%27[SQL INJECTION VULNERABILITY!]--&type=BASE%20TABLE 
Load Flags[VALIDATE_NEVER  LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[495] Mime Type[text/html]
   Request Header:
      Host[pimcore.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Cookie[__utma=59704236.87754243.1415885491.1415885491.1415885491.1; 
__utmb=59704236.1.10.1415885491; __utmc=59704236; 
__utmz=59704236.1415885491.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); 
pimcore_admin_sid=28vctg6ilpedepa26b81gqeps5]
      Connection[keep-alive]
   Response Header:
      Date[Thu, 13 Nov 2014 13:55:50 GMT]
      Server[Apache/2.2.22 (Debian)]
      Set-Cookie[pimcore_admin_sid=28vctg6ilpedepa26b81gqeps5; path=/; HttpOnly]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Cache-Control[no-store, no-cache, must-revalidate, post-check=0, pre-check=0]
      Pragma[no-cache]
      Connection[close]
      Content-Encoding[gzip]
      X-Powered-By[pimcore]
      Content-Length[495]
      Content-Type[text/html]


--- Error & Exception Logs ---
Fatal error: Uncaught exception 'Zend_Db_Statement_Mysqli_Exception' with message 'Mysqli prepare error: 
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 '-1'' at line 1' 
in /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement/Mysqli.php:77 
-
Stack trace: #0 /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare('SELECT * FROM -...') 
#1 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Mysqli.php(388): Zend_Db_Statement->__construct(Object(Zend_Db_Adapter_Mysqli), 'SELECT * FROM -...') 
#2 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Adapter_Mysqli->prepare('SELECT * FROM -...') 
#3 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Abstract.php(737): Zend_Db_Adapter_Abstract->query('SELECT * FROM -...', Array) 
#4 [internal function]: Zend_Db_Adapter_Abstract->fetchAll('SELECT * FROM -...') #5 /home/pimcore-service/www/pimcore/lib/Pimcore/Resource/Wrapper.php(230): 
call in /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement/Mysqli.php on line 77
-
Fatal error: Call to a member function isAllowed() on a non-object in /home/pimcore-service/www/pimcore/lib/Pimcore/Controller/Action/Admin/Element.php on line 37
-
Fatal error: Uncaught exception 'Zend_Db_Statement_Mysqli_Exception' with message 'Mysqli prepare error: 
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 '-1'' at line 1' 
in /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement/Mysqli.php:77 
-
Stack trace: #0 /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare('SELECT * FROM -...') 
#1 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Mysqli.php(388): Zend_Db_Statement->__construct(Object(Zend_Db_Adapter_Mysqli), 'SELECT * FROM -...') 
#2 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Adapter_Mysqli->prepare('SELECT * FROM -...') 
#3 /home/pimcore-service/www/pimcore/lib/Zend/Db/Adapter/Abstract.php(737): Zend_Db_Adapter_Abstract->query('SELECT * FROM -...', Array) 
#4 [internal function]: Zend_Db_Adapter_Abstract->fetchAll('SELECT * FROM -...') 
#5 /home/pimcore-service/www/pimcore/lib/Pimcore/Resource/Wrapper.php(230): call in /home/pimcore-service/www/pimcore/lib/Zend/Db/Statement/Mysqli.php on line 77


Solution - Fix & Patch:
=======================
The vulnerability can be patched by implementation of two prepared statements in the section were the vulnerable name value is in usage.
Encode and parse also the qrcode and mysql GET method request to prevent exploitation.

The fix for the backup routine is already in the main trunk and can be reviewed here: 
https://github.com/pimcore/pimcore/commit/93067d865affa5a0110ae7e9904cbc5ff5868376

Note: The patch will be part of the next version (RC 2) and the final 3.0 release. You can verify it also by downloading the lastest build from pimcore.org/download. 


Security Risk:
==============
The security risk of the sql injection web vulnerability in the pimcore content management system is estimated as high. (CVSS 6.4)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@xxxxxxxxxxxxxxxxx) [www.vulnerability-lab.com]


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