MariaDB must generate audit records when security objects are deleted.

An XCCDF Rule

Description

<VulnDiscussion>The removal of security objects from the database/DBMS would seriously degrade a system s information assurance posture. If such an event occurs, it must be logged.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>

ID: SV-253760r879872_rule
Severity: Medium
References: CCI-000172
Updated: 9 months ago

Super/administrative users must not have access to modify tables within the mysql database. Verify users do not have access and revoke as necessary. Example: 

View user grants:

MariaDB> SHOW GRANTS FOR 'username'@'host';
If user has INSERT, UPDATE, and/or DELETE on the mysql database or all databases, modify the user privileges as necessary. 

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"
            ]
         }'
      ));

MariaDB must generate audit records when security objects are deleted.

Description

Remediation - Manual Procedure