MariaDB must generate audit records when categories of information (e.g., classification levels/security levels) are accessed.

Changes in categories of information must be tracked. Without an audit trail, unauthorized access to protected data could go undetected.

For detailed information on categorizing information, refer to FIPS Publication 199, Standards for Security Categorization of Federal Information and Information Systems, and FIPS Publication 200, Minimum Security Requirements for Federal Information and Information Systems.

Verify the MariaDB Enterprise Audit plugin is loaded and actively logging:

MariaDB> SHOW GLOBAL STATUS LIKE 'Server_audit_active';

If the MariaDB Enterprise Audit is not active, this is a finding.

Check what filters are in place by running the following as an administrative user:

MariaDB> SELECT * FROM mysql.server_audit_filters;

Verify query_events includes ALL in corresponding audit filters. If not, this is a finding.

The MariaDB Enterprise Audit plugin can be configured to audit these changes.

Update necessary audit filters to include query_event ALL. Example:

MariaDB> DELETE FROM mysql.server_audit_filters WHERE filtername = 'default';

MariaDB> INSERT INTO mysql.server_audit_filters (filtername, rule) VALUES ('default', JSON_COMPACT( '{ "connect_event": [ "CONNECT", "DISCONNECT" ], "query_event": [ "ALL" ] }' ));