Trace or Audit records must be generated when categorized information (e.g., classification levels/security levels) is accessed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-67413	SQL4-00-035800	SV-81903r2_rule		Medium

Description
Changes in categorized information must be tracked. Without an audit trail, unauthorized access to protected data could go undetected. For detailed information on categorizing information, refer to FIPS Publication 199, Standards for Security Categorization of Federal Information and Information Systems, and FIPS Publication 200, Minimum Security Requirements for Federal Information and Information Systems. Use of SQL Server Audit is recommended. All features of SQL Server Audit are available in the Enterprise and Developer editions of SQL Server 2014. It is not available at the database level in other editions. For this or legacy reasons, the instance may be using SQL Server Trace for auditing, which remains an acceptable solution for the time being. Note, however, that Microsoft intends to remove most aspects of Trace at some point after SQL Server 2016. Note also that Trace does not support auditing of SELECT statements, whereas Audit does. Since Trace does not provide for tracking SELECT statements, it is necessary to provide this tracking at the application level, if Trace is used for audit purposes.

Description

Changes in categorized information must be tracked. Without an audit trail, unauthorized access to protected data could go undetected. For detailed information on categorizing information, refer to FIPS Publication 199, Standards for Security Categorization of Federal Information and Information Systems, and FIPS Publication 200, Minimum Security Requirements for Federal Information and Information Systems. Use of SQL Server Audit is recommended. All features of SQL Server Audit are available in the Enterprise and Developer editions of SQL Server 2014. It is not available at the database level in other editions. For this or legacy reasons, the instance may be using SQL Server Trace for auditing, which remains an acceptable solution for the time being. Note, however, that Microsoft intends to remove most aspects of Trace at some point after SQL Server 2016. Note also that Trace does not support auditing of SELECT statements, whereas Audit does. Since Trace does not provide for tracking SELECT statements, it is necessary to provide this tracking at the application level, if Trace is used for audit purposes.

STIG	Date
MS SQL Server 2014 Database Security Technical Implementation Guide	2017-12-01

Details

Check Text ( C-67993r3_chk )
Review the system documentation to determine whether it is required to track categories of information, such as classification or sensitivity level. If it is not, this is not applicable (NA). If neither SQL Server Audit nor SQL Server Trace is in use for audit purposes, this is a finding. If SQL Server Trace is in use for audit purposes, review the application(s) using the database to verify that all SELECT actions on categorized data are being audited, and that the tracking records are written to the SQL Server Trace. If not, this is a finding. If SQL Server Audit is in use, proceed as follows. The basic SQL Server Audit configuration provided in the supplemental file Audit.sql uses the broad, server-level audit action group SCHEMA_OBJECT_ACCESS_GROUP for this purpose. SQL Server Audit's flexibility makes other techniques possible. If an alternative technique is in use and demonstrated effective, this is not a finding. Determine the name(s) of the server audit specification(s) in use. To look at audits and audit specifications, in Management Studio's object explorer, expand >> Security >> Audits and >> Security >> Server Audit Specifications. Also, >> Databases >> >> Security >> Database Audit Specifications. Alternatively, review the contents of the system views with "audit" in their names. Run the following to verify that all SELECT, INSERT, UPDATE, and DELETE actions on tables and views are being audited: USE [master]; GO SELECT * FROM sys.server_audit_specification_details WHERE server_specification_id = (SELECT server_specification_id FROM sys.server_audit_specifications WHERE [name] = '') AND audit_action_name = 'SCHEMA_OBJECT_ACCESS_GROUP'; If no row is returned, this is a finding. If the audited_result column is not "SUCCESS" or "SUCCESS AND FAILURE", this is a finding.

Check Text ( C-67993r3_chk )

Review the system documentation to determine whether it is required to track categories of information, such as classification or sensitivity level. If it is not, this is not applicable (NA).

If neither SQL Server Audit nor SQL Server Trace is in use for audit purposes, this is a finding.

If SQL Server Trace is in use for audit purposes, review the application(s) using the database to verify that all SELECT actions on categorized data are being audited, and that the tracking records are written to the SQL Server Trace. If not, this is a finding.

If SQL Server Audit is in use, proceed as follows.

The basic SQL Server Audit configuration provided in the supplemental file Audit.sql uses the broad, server-level audit action group SCHEMA_OBJECT_ACCESS_GROUP for this purpose. SQL Server Audit's flexibility makes other techniques possible.

If an alternative technique is in use and demonstrated effective, this is not a finding.

Determine the name(s) of the server audit specification(s) in use.

To look at audits and audit specifications, in Management Studio's object explorer, expand
>> Security >> Audits
and
>> Security >> Server Audit Specifications.
Also,
>> Databases >> >> Security >> Database Audit Specifications.

Alternatively, review the contents of the system views with "audit" in their names.

Run the following to verify that all SELECT, INSERT, UPDATE, and DELETE actions on tables and views are being audited:
USE [master];
GO
SELECT * FROM sys.server_audit_specification_details WHERE server_specification_id =
(SELECT server_specification_id FROM sys.server_audit_specifications WHERE [name] = '')
AND audit_action_name = 'SCHEMA_OBJECT_ACCESS_GROUP';

If no row is returned, this is a finding.

If the audited_result column is not "SUCCESS" or "SUCCESS AND FAILURE", this is a finding.

Fix Text (F-73527r1_fix)
Where SQL Server Trace is in use, implement tracking of SELECTs on categorized data at the application level, using the system stored procedure sp_trace_generateevent to write the tracking records to the Trace used for audit purposes. If SQL Server Audit is in use, design and deploy an Audit that captures all auditable events and data items. The script provided in the supplemental file Audit.sql can be used as the basis for this. Supplement the standard audit data as necessary, using Extended Events and/or triggers. Alternatively, to add the necessary data capture to an existing server audit specification, run the script: USE [master]; GO ALTER SERVER AUDIT SPECIFICATION WITH (STATE = OFF); GO ALTER SERVER AUDIT SPECIFICATION ADD (SCHEMA_OBJECT_ACCESS_GROUP); GO ALTER SERVER AUDIT SPECIFICATION WITH (STATE = ON); GO

Fix Text (F-73527r1_fix)

Where SQL Server Trace is in use, implement tracking of SELECTs on categorized data at the application level, using the system stored procedure sp_trace_generateevent to write the tracking records to the Trace used for audit purposes.

If SQL Server Audit is in use, design and deploy an Audit that captures all auditable events and data items. The script provided in the supplemental file Audit.sql can be used as the basis for this. Supplement the standard audit data as necessary, using Extended Events and/or triggers.

Alternatively, to add the necessary data capture to an existing server audit specification, run the script:
USE [master];
GO
ALTER SERVER AUDIT SPECIFICATION WITH (STATE = OFF);
GO
ALTER SERVER AUDIT SPECIFICATION ADD (SCHEMA_OBJECT_ACCESS_GROUP);
GO
ALTER SERVER AUDIT SPECIFICATION WITH (STATE = ON);
GO