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


Overview

Finding ID Version Rule ID IA Controls Severity
V-79279 SQL6-D0-014300 SV-93985r1_rule Medium
Description
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.
STIG Date
MS SQL Server 2016 Instance Security Technical Implementation Guide 2018-03-09

Details

Check Text ( C-78871r1_chk )
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 (F-86031r1_fix)
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 "SRG SQL Server Audit Definition.sql" for complete script.