Attack Chain

1. An attacker authenticates to the Joomla application.
2. The attacker crafts a malicious POST request targeting the extroformfield view.
3. The POST request includes SQL injection payloads within the filter_type_id, filter_pid_id, or filter_search parameters.
4. The eXtroForms component processes the request without proper sanitization of the input.
5. The injected SQL code is executed against the Joomla database.
6. The attacker retrieves sensitive information such as user credentials, configuration data, or other stored data.
7. The attacker may further leverage the SQL injection to modify data within the database.
8. The attacker gains unauthorized access to the Joomla application and/or the underlying server.

Impact

Successful exploitation of CVE-2018-25380 can lead to the exposure of sensitive data stored within the Joomla application’s database. This includes user credentials, personal information, and potentially confidential business data. An attacker could also modify or delete data, leading to data loss or corruption. The high CVSS score of 7.1 reflects the potential for significant impact due to unauthorized data access and modification.

Recommendation

• Apply available patches or updates for the eXtroForms component to address CVE-2018-25380.
• Deploy the Sigma rule Detect Joomla eXtroForms SQL Injection Attempt (CVE-2018-25380) to identify potentially malicious POST requests.
• Implement input validation and sanitization measures to prevent SQL injection vulnerabilities in Joomla components.
• Monitor web server logs for suspicious POST requests to the extroformfield view, as described in the rule’s logsource block.
• Review and restrict database user privileges to minimize the impact of successful SQL injection attacks.