The audit information produced by MariaDB must be protected from unauthorized deletion.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253681	MADB-10-002200	SV-253681r841568_rule		Medium

Description
If audit data were to become compromised, then competent forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit data, the information system and/or the application must protect audit information from unauthorized deletion. This requirement can be achieved through multiple methods which will depend upon system architecture and design. Some commonly employed methods include ensuring log files enjoy the proper file system permissions utilizing file system protections; restricting access; and backing up log data to ensure log data is retained. Applications providing a user interface to audit data will leverage user permissions and roles identifying the user accessing the data and the corresponding rights the user enjoys to make access decisions regarding the deletion of audit data. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. Deletion of database audit data could mask the theft of, or the unauthorized modification of, sensitive data stored in the database.

Description

If audit data were to become compromised, then competent forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit data, the information system and/or the application must protect audit information from unauthorized deletion. This requirement can be achieved through multiple methods which will depend upon system architecture and design. Some commonly employed methods include ensuring log files enjoy the proper file system permissions utilizing file system protections; restricting access; and backing up log data to ensure log data is retained. Applications providing a user interface to audit data will leverage user permissions and roles identifying the user accessing the data and the corresponding rights the user enjoys to make access decisions regarding the deletion of audit data. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. Deletion of database audit data could mask the theft of, or the unauthorized modification of, sensitive data stored in the database.

STIG	Date
MariaDB Enterprise 10.x Security Technical Implementation Guide	2022-08-24

Details

Check Text ( C-57133r841566_chk )
Determine if the MariaDB Enterprise Audit plugin is logging to a file or syslog. MariaDB> SHOW GLOBAL VARIABLES LIKE 'server_audit_output_type'; If FILE, find the location of the audit log: MariaDB> SHOW GLOBAL VARIABLES LIKE 'server_audit_file_path'; If FILE, check the permission of the file: $ sudo ls -al /path/to/audit.log Consult the organization's security guide on acceptable permissions and ownership of logs with respect to who can modify them. Verify the log files have the set configurations. If the permissions are not set to the organization's standards, this is a finding. If the MariaDB server is configured to use syslog for logging, consult the organization's syslog setting for permissions and ownership of logs with respect to who can modify them.

Check Text ( C-57133r841566_chk )

Determine if the MariaDB Enterprise Audit plugin is logging to a file or syslog.

MariaDB> SHOW GLOBAL VARIABLES LIKE 'server_audit_output_type';

If FILE, find the location of the audit log:

MariaDB> SHOW GLOBAL VARIABLES LIKE 'server_audit_file_path';

If FILE, check the permission of the file:

$ sudo ls -al /path/to/audit.log

Consult the organization's security guide on acceptable permissions and ownership of logs with respect to who can modify them. Verify the log files have the set configurations.

If the permissions are not set to the organization's standards, this is a finding.

If the MariaDB server is configured to use syslog for logging, consult the organization's syslog setting for permissions and ownership of logs with respect to who can modify them.

Fix Text (F-57084r841567_fix)
If the audit.log file permissions do not comply with organization's standards, change the permissions. Example: $ chown user:group /path/to/audit.log $ chmod 660 /path/to/audit.log If the MariaDB server is configured to use syslog for logging, consult the organization's syslog setting for permissions and ownership of logs with respect to who can modify them.