SQL Server must generate audit records when privileges/permissions are deleted.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-79275	SQL6-D0-014100	SV-93981r1_rule		Medium

Description
Changes in the permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized elevation or restriction of privileges could go undetected. Elevated privileges give users access to information and functionality that they should not have; restricted privileges wrongly deny access to authorized users. In an SQL environment, deleting permissions is typically done via the REVOKE or DENY command.

Description

Changes in the permissions, privileges, and roles granted to users and roles must be tracked. Without an audit trail, unauthorized elevation or restriction of privileges could go undetected. Elevated privileges give users access to information and functionality that they should not have; restricted privileges wrongly deny access to authorized users. In an SQL environment, deleting permissions is typically done via the REVOKE or DENY command.

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

Details

Check Text ( C-78867r1_chk )
Check the SQL Server Audit being used for the STIG compliant audit. If the following events are not included, this is a finding. DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP DATABASE_OBJECT_PERMISSION_CHANGE_GROUP DATABASE_OWNERSHIP_CHANGE_GROUP DATABASE_PERMISSION_CHANGE_GROUP DATABASE_ROLE_MEMBER_CHANGE_GROUP SCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP SERVER_OBJECT_OWNERSHIP_CHANGE_GROUP SERVER_OBJECT_PERMISSION_CHANGE_GROUP SERVER_PERMISSION_CHANGE_GROUP SERVER_ROLE_MEMBER_CHANGE_GROUP Reference: https://msdn.microsoft.com/en-us/library/cc280663.aspx

Check Text ( C-78867r1_chk )

Check the SQL Server Audit being used for the STIG compliant audit.

If the following events are not included, this is a finding.

DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP
DATABASE_OBJECT_PERMISSION_CHANGE_GROUP
DATABASE_OWNERSHIP_CHANGE_GROUP
DATABASE_PERMISSION_CHANGE_GROUP
DATABASE_ROLE_MEMBER_CHANGE_GROUP
SCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP
SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP
SERVER_OBJECT_OWNERSHIP_CHANGE_GROUP
SERVER_OBJECT_PERMISSION_CHANGE_GROUP
SERVER_PERMISSION_CHANGE_GROUP
SERVER_ROLE_MEMBER_CHANGE_GROUP

Reference:
https://msdn.microsoft.com/en-us/library/cc280663.aspx

Fix Text (F-86027r1_fix)
Add the following events to the SQL Server Audit that is being used for the STIG compliant audit. DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP DATABASE_OBJECT_PERMISSION_CHANGE_GROUP DATABASE_OWNERSHIP_CHANGE_GROUP DATABASE_PERMISSION_CHANGE_GROUP DATABASE_ROLE_MEMBER_CHANGE_GROUP SCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP SERVER_OBJECT_OWNERSHIP_CHANGE_GROUP SERVER_OBJECT_PERMISSION_CHANGE_GROUP SERVER_PERMISSION_CHANGE_GROUP SERVER_ROLE_MEMBER_CHANGE_GROUP See the supplemental file "SRG SQL Server Audit Definition.sql". Reference: https://msdn.microsoft.com/en-us/library/cc280663.aspx

Fix Text (F-86027r1_fix)

Add the following events to the SQL Server Audit that is being used for the STIG compliant audit.

DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP
DATABASE_OBJECT_PERMISSION_CHANGE_GROUP
DATABASE_OWNERSHIP_CHANGE_GROUP
DATABASE_PERMISSION_CHANGE_GROUP
DATABASE_ROLE_MEMBER_CHANGE_GROUP
SCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP
SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP
SERVER_OBJECT_OWNERSHIP_CHANGE_GROUP
SERVER_OBJECT_PERMISSION_CHANGE_GROUP
SERVER_PERMISSION_CHANGE_GROUP
SERVER_ROLE_MEMBER_CHANGE_GROUP

See the supplemental file "SRG SQL Server Audit Definition.sql".
Reference:
https://msdn.microsoft.com/en-us/library/cc280663.aspx