The MySQL Database Server 8.0 must generate audit records when unsuccessful logons or connection attempts occur.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235126	MYS8-00-003900	SV-235126r623500_rule		Medium

Description
For completeness of forensic analysis, it is necessary to track failed attempts to log on to the Database Management System (DBMS). While positive identification may not be possible in a case of failed authentication, as much information as possible about the incident must be captured.

STIG	Date
Oracle MySQL 8.0 Security Technical Implementation Guide	2022-09-12

Details

Check Text ( C-38345r623498_chk )
Review the system documentation to determine if MySQL Server is required to audit when unsuccessful logons or connection attempts occur. 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. To check if the audit filters that are in place are generating records when unsuccessful logons or connection attempts occur: Log in to MySQL and then log out. For example, using MySQL Shell: % mysqlsh —sql MySQL SQL > \connect notauser@localhost Creating a session to 'notauser@localhost' Please provide the password for 'notauser@localhost': MySQL Error 1045: Access denied for user 'notauser'@'localhost' (using password: YES) Review the audit log by running the Linux command: Note, "status": 1045 for each indicates failed attempt. sudo cat /audit.log \| egrep notauser For example if the values returned by - "select @@datadir, @@audit_log_file; " are /usr/local/mysql/data/, audit.log sudo cat /usr/local/mysql/data/audit.log \|egrep notauser The audit data will look similar to the example below: { "timestamp": "2020-08-21 17:54:08", "id": 0, "class": "connection", "event": "connect", "connection_id": 20, "account": { "user": "", "host": "localhost" }, "login": { "user": "notauser", "os": "", "ip": "::1", "proxy": "" }, "connection_data": { "connection_type": "plugin", "status": 1045, "db": "" } },

Check Text ( C-38345r623498_chk )

Review the system documentation to determine if MySQL Server is required to audit when unsuccessful logons or connection attempts occur.

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.

To check if the audit filters that are in place are generating records when unsuccessful logons or connection attempts occur:

Log in to MySQL and then log out. For example, using MySQL Shell:
% mysqlsh —sql
MySQL SQL > \connect notauser@localhost
Creating a session to 'notauser@localhost'
Please provide the password for 'notauser@localhost':
MySQL Error 1045: Access denied for user 'notauser'@'localhost' (using password: YES)

Review the audit log by running the Linux command:
Note, "status": 1045 for each indicates failed attempt.

sudo cat /audit.log | egrep notauser
For example if the values returned by - "select @@datadir, @@audit_log_file; " are /usr/local/mysql/data/, audit.log
sudo cat /usr/local/mysql/data/audit.log |egrep notauser

The audit data will look similar to the example below:
{ "timestamp": "2020-08-21 17:54:08", "id": 0, "class": "connection", "event": "connect", "connection_id": 20, "account": { "user": "", "host": "localhost" }, "login": { "user": "notauser", "os": "", "ip": "::1", "proxy": "" }, "connection_data": { "connection_type": "plugin", "status": 1045, "db": "" } },

Fix Text (F-38308r623499_fix)
If currently required, configure the MySQL Database Server to audit when unsuccessful logons or connections attempts occur. See the supplemental file "MySQL80Audit.sql".