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Stash v1.0.3 CMS - SQL Injection Vulnerability
Aug 15 2016 10:59AM
Vulnerability Lab (research vulnerability-lab com)
Stash v1.0.3 CMS - SQL Injection Vulnerability
Vulnerability Laboratory ID (VL-ID):
Common Vulnerability Scoring System:
Product & Service Introduction:
Stash is a free content management system (CMS). Was written on PHP and uses MySQL. Distributed under The Creative Commons License.
Abstract Advisory Information:
The vulnerability laboratory core research team discovered a remote sql-injection web vulnerability in the official Stash v1.0.3 content management system.
Vulnerability Disclosure Timeline:
2016-08-10: Public Disclosure (Vulnerability Laboratory)
Product: Stash - Content Management System (Web-Application) 1.0.3
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 `./stash/admin/` module GET method request.
Remote attackers are able to execute own sql commands by usage of the insecure `usersedit.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 6.0.
Exploitation of the remote sql injection 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.
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.
--- Error Exception Logs [SQL] ---
Query 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
--- PoC Session Logs [GET] ---
ON VIA ID PARAMETER!]--
User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
Date[Sun, 07 Aug 2016 16:06:03 GMT]
Solution - Fix & Patch:
The sql-injection web vulnerability in the application can be patched by usage of a prepared statement in the vulnerable usersedit.php file GET method request.
Disallow the usage of special chars and escape the input/output context of the module to prevent further sql-injection attacks.
The security risk of the remote sql-injection web vulnerability in the useredit.php file GET method request is estimated as high. (CVSS 6.0)
Credits & Authors:
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.)
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