Attack Chain

1. Attacker identifies a Joomla website using Balbooa Forms Builder 2.0.6.
2. Attacker crafts a malicious POST request targeting the com_baforms component.
3. The POST request includes a JSON payload with a manipulated ‘id’ parameter containing SQL injection code.
4. The application fails to properly sanitize the ‘id’ parameter before using it in a database query.
5. The injected SQL code is executed against the Joomla database.
6. The attacker extracts sensitive information from the database, such as user credentials or configuration details.
7. The extracted information can then be used for further malicious activities such as lateral movement or data exfiltration.

Impact

Successful exploitation of CVE-2021-47930 can lead to a complete compromise of the Joomla application and its underlying database. Attackers can steal sensitive data, including user credentials, personal information, and confidential business data. This can result in significant financial losses, reputational damage, and legal liabilities. Given the widespread use of Joomla and Balbooa Forms Builder, a large number of websites are potentially at risk.

Recommendation

• Apply the latest security patches or upgrade to a version of Balbooa Joomla Forms Builder that addresses CVE-2021-47930 to remediate the SQL injection vulnerability.
• Deploy the Sigma rule “Detect CVE-2021-47930 Exploitation — Balbooa Joomla Forms Builder SQL Injection” to monitor for exploitation attempts targeting the com_baforms component.
• Implement input validation and sanitization measures to prevent SQL injection attacks, focusing on the ‘id’ parameter in POST requests to the com_baforms component.
• Review web server logs for suspicious POST requests targeting the com_baforms component, looking for SQL injection payloads in the ‘id’ parameter.