SQL Injection in Elxis CMS

Vulnerability ID: HTB22699
Reference: http://www.htbridge.ch/advisory/sql_injection_in_elxis_cms.html
Product: Elxis CMS
Vendor: Elxis Team ( http://www.elxis.org/ )
Vulnerable Version: 2009.2 electra
Vendor Notification: 16 November 2010
Vulnerability Type: SQL Injection
Status: Fixed by Vendor
Risk level: High
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
The vulnerability exists due to failure in the "/index.php" script to properly sanitize user-supplied input in X_FORWARDED_FOR variable.
Attacker can alter queries to the application SQL database, execute arbitrary queries to the database, compromise the application, access or modify sensitive data, or exploit various vulnerabilities in the underlying SQL database.

The following PoC is available:

POST /index.php?option=com_poll&Itemid=17 HTTP/1.1
X_FORWARDED_FOR: 123'SQL_CODE_HERE
Content-Type: application/x-www-form-urlencoded
Content-Length: 66

voteid=1&option=com_poll&task=vote&id=1&Itemid=17&task_button=Vote

Solution: Upgrade to the most recent version