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4.4.3 Ensure server parameter 'audit_log_enabled' is set to 'ON' for MySQL Database Server (Manual)​

Profile Applicability​

• Level 2

Description​

Enable audit_log_enabled on MySQL Servers

Rationale​

Enabling audit_log_enabled helps MySQL Database to log items such as connection attempts to the server, DDL/DML access, and more. Log data can be used to identify, troubleshoot, and repair configuration errors and suboptimal performance.

Impact​

There are further costs incurred for storage of logs. For high traffic databases these logs will be significant. Determine your organization's needs before enabling.

Audit​

From Azure Portal​

  1. Login to Azure Portal using https://portal.azure.com
  2. Select your Azure Database for MySQL server
  3. For each database, under the Settings section in the sidebar, select Server parameters
  4. Ensure the audit_log_enabled parameter is set to ON

Remediation​

From Azure Portal​

  1. Login to Azure Portal using https://portal.azure.com
  2. Select your Azure Database for MySQL server
  3. For each database, under the Settings section in the sidebar, select Server parameters
  4. Update the audit_log_enabled parameter to ON
  5. Under the Monitoring section in the sidebar, select Diagnostic settings.
  6. Provide a diagnostic setting name
  7. Specify which data sinks to send the audit logs (storage account, event hub, and/or Log Analytics workspace)
  8. Select "MySqlAuditLogs" as the log type
  9. Once you've configured the data sinks to pipe the audit logs to, you can click Save
  10. Access the audit logs by exploring them in the data sinks you configured. It may take up to 10 minutes for the logs to appear

References​

https://docs.microsoft.com/en-us/azure/mysql/single-server/how-to-configure-audit-logs-portal
https://docs.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-logging-threat-detection#lt-3-enable-logging-for-security-investigation

Additional Information​

There is also a CLI version: https://docs.microsoft.com/en-us/azure/mysql/single-server/how-to-configure-audit-logs-cli

There are numerous settings and event types and it might be helpful to discuss which of these may be appropriate to have a separate check item for.