SQL Server must generate audit records when unsuccessful attempts to delete security objects occur.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-79281	SQL6-D0-014400	SV-93987r1_rule		Medium

Description
The removal of security objects from the database/DBMS would seriously degrade a system's information assurance posture. If such an action is attempted, it must be logged. To aid in diagnosis, it is necessary to keep track of failed attempts in addition to the successful ones.

STIG	Date
MS SQL Server 2016 Instance Security Technical Implementation Guide	2018-03-09

Details

Check Text ( C-78873r1_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.

Check Text ( C-78873r1_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-86033r1_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.

Fix Text (F-86033r1_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.