SQL Server must generate audit records when security objects are deleted.

From MS SQL Server 2016 Instance Security Technical Implementation Guide

Part of SRG-APP-000501-DB-000336

Associated with: CCI-000172

SV-93985r2_rule SQL Server must generate audit records when security objects are deleted.

Vulnerability discussion

The removal of security objects from the database/DBMS would seriously degrade a system's information assurance posture. If such an event occurs, it must be logged.

Check content

Determine if an audit is configured and started by executing the following query. SELECT name AS 'Audit Name', status_desc AS 'Audit Status', audit_file_path AS 'Current Audit File' FROM sys.dm_server_audit_status If no records are returned, this is a finding. Execute the following query to verify the "SCHEMA_OBJECT_CHANGE_GROUP" is included in the server audit specification. SELECT a.name AS 'AuditName', s.name AS 'SpecName', d.audit_action_name AS 'ActionName', d.audited_result AS 'Result' FROM sys.server_audit_specifications s JOIN sys.server_audits a ON s.audit_guid = a.audit_guid JOIN sys.server_audit_specification_details d ON s.server_specification_id = d.server_specification_id WHERE a.is_state_enabled = 1 AND d.audit_action_name = 'SCHEMA_OBJECT_CHANGE_GROUP' If the "SCHEMA_OBJECT_CHANGE_GROUP" is not returned in an active audit, this is a finding.

Fix text

Add the "SCHEMA_OBJECT_CHANGE_GROUP" to the server audit specification USE [master]; GO ALTER SERVER AUDIT SPECIFICATION STIG_AUDIT_SERVER_SPECIFICATION WITH (STATE = OFF); GO ALTER SERVER AUDIT SPECIFICATION STIG_AUDIT_SERVER_SPECIFICATION ADD (SCHEMA_OBJECT_CHANGE_GROUP); GO ALTER SERVER AUDIT SPECIFICATION STIG_AUDIT_SERVER_SPECIFICATION WITH (STATE = ON); GO See the supplemental script "SQL 2016 Audit.sql" for complete script.

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