The MySQL Database Server 8.0 must generate audit records when privileges/permissions are added.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235111	MYS8-00-002400	SV-235111r623455_rule		Medium

Description
Changes in the permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized elevation or restriction of individuals and groups privileges could go undetected. Elevated privileges give users access to information and functionality that they must not have; restricted privileges wrongly deny access to authorized users. In a SQL environment, adding permissions is typically done via the GRANT command, or, in the negative, the DENY command.

Description

Changes in the permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized elevation or restriction of individuals and groups privileges could go undetected. Elevated privileges give users access to information and functionality that they must not have; restricted privileges wrongly deny access to authorized users. In a SQL environment, adding permissions is typically done via the GRANT command, or, in the negative, the DENY command.

STIG	Date
Oracle MySQL 8.0 Security Technical Implementation Guide	2021-12-10

Details

Check Text ( C-38330r623453_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 should 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 the command: select * from mysql.audit_log_filter; If the template SQL filter was used, it will have the name log_stig. Review the filter value. It will show filters for events of the type 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

Check Text ( C-38330r623453_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 should 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 the command:
select * from mysql.audit_log_filter;

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

Review the filter value. It will show filters for events of the type 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-38293r623454_fix)
Configure the MySQL Database Server to audit when privileges/permissions are added. Add the following events to the MySQL Server Audit 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".

Fix Text (F-38293r623454_fix)

Configure the MySQL Database Server to audit when privileges/permissions are added.

Add the following events to the MySQL Server Audit 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".