Attack Chain

1. An attacker identifies a Simple Content Management System 1.0 instance running online.
2. The attacker crafts a malicious HTTP request targeting /web/index.php with a modified ID parameter containing SQL injection code.
3. The webserver receives the request and passes the ID parameter to the application.
4. The application fails to properly sanitize the ID parameter before using it in an SQL query.
5. The injected SQL code is executed against the database server.
6. The attacker extracts sensitive information from the database, such as usernames, passwords, and other confidential data.
7. The attacker uses the compromised credentials or data to gain further access to the system.
8. The attacker may modify data, deface the website, or install a web shell for persistent access and control.

Impact

Successful exploitation of this SQL injection vulnerability can lead to significant data breaches, website defacement, and complete compromise of the Simple Content Management System 1.0. An attacker could gain access to sensitive information, including user credentials, financial data, and other confidential information stored in the database. The number of affected installations is currently unknown, but given the public availability of the exploit, widespread exploitation is possible. This can result in financial losses, reputational damage, and legal liabilities for affected organizations.

Recommendation

• Inspect web server logs for requests to /web/index.php containing suspicious characters or SQL keywords in the ID parameter to detect potential exploitation attempts (Sigma rule: "Detect Simple CMS SQL Injection Attempt").
• Apply input validation and sanitization to the ID parameter in /web/index.php to prevent SQL injection attacks.
• Monitor network traffic for outbound connections originating from the web server to unusual destinations, which may indicate data exfiltration after successful exploitation (Sigma rule: "Detect Outbound Connection After Simple CMS Exploit").
• Review the GitHub exploit URL (https://github.com/Xmyronn/simple-cms-sqli-id-parameter) to understand the attack vector and potential payload.
• Implement a web application firewall (WAF) rule to block requests containing malicious SQL injection patterns targeting the /web/index.php endpoint.