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V-253755

CAT II (Medium)

MariaDB must generate audit records when unsuccessful attempts to modify security objects occur.

Rule ID

SV-253755r961803_rule

STIG

MariaDB Enterprise 10.x Security Technical Implementation Guide

Version

V2R5

CCIs

CCI-000172

Discussion

Changes in the database objects (tables, views, procedures, functions) that record and control permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized changes to the security subsystem could go undetected. The database could be severely compromised or rendered inoperative. To aid in diagnosis, it is necessary to keep track of failed attempts in addition to the successful ones.

Check Content

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 ALL is included in corresponding audit filters. If not, this is a finding.

Fix Text

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"
            ]
         }'
      ));