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The MySQL Database Server 8.0 must generate audit records when unsuccessful attempts to modify privileges/permissions occur.


Overview

Finding ID Version Rule ID IA Controls Severity
V-235114 MYS8-00-002700 SV-235114r623464_rule Medium
Description
Failed attempts to change the permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized attempts to elevate or restrict individual and group privileges could go undetected. In an SQL environment, modifying permissions is typically done via the GRANT, REVOKE, and DENY commands. To aid in diagnosis, it is necessary to keep track of failed attempts in addition to the successful ones.
STIG Date
Oracle MySQL 8.0 Security Technical Implementation Guide 2021-12-10

Details

Check Text ( C-38333r623462_chk )
Check that MySQL Server Audit is being used for the STIG compliant audit.

Check if MySQL audit is configured and enabled. The my.cnf file will set the variable audit_file.

To further check, execute the following query:
SELECT PLUGIN_NAME, PLUGIN_STATUS
FROM INFORMATION_SCHEMA.PLUGINS
WHERE PLUGIN_NAME LIKE 'audit%';

The status of the audit_log plugin must be "active". If it is not "active", this is a finding.

Review audit filters and associated users by running the following queries:
SELECT `audit_log_filter`.`NAME`,
`audit_log_filter`.`FILTER`
FROM `mysql`.`audit_log_filter`;

SELECT `audit_log_user`.`USER`,
`audit_log_user`.`HOST`,
`audit_log_user`.`FILTERNAME`
FROM `mysql`.`audit_log_user`;

All currently defined audits for the MySQL server instance will be listed. If no audits are returned, this is a finding.

Determine if rules are in place to capture the following types of commands related to permissions by running:
select * from mysql.audit_log_filter;

If the template SQL filter was used, it will have the name log_stig.

Review the filter values. It will show filters for events of the type of the field general_sql_command.str for the following SQL statement types:
grant
grant_roles
revoke
revoke_all
revoke_roles
drop_role
alter_user_default_role
create_role
drop_role
grant_roles
revoke_roles
set_role
create_user
alter_user
drop_user
alter_user
alter_user_default_role
create_user
drop_user
rename_user
show_create_user
Fix Text (F-38296r623463_fix)
Configure the MySQL Database Server to audit when privileges/permissions are added.

Add the following events to the MySQL Server Audit that is being used for the STIG compliance audit:
grant
grant_roles
revoke
revoke_all
revoke_roles
drop_role
alter_user_default_role
create_role
drop_role
grant_roles
revoke_roles
set_role
create_user
alter_user
drop_user
alter_user
alter_user_default_role
create_user
drop_user
rename_user
show_create_user

See the supplemental file "MySQL80Audit.sql".