STIGQter STIGQter: STIG Summary: MS SQL Server 2014 Database Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 26 Jan 2018:

SQL Server must generate Trace or Audit records when locally-defined security objects are dropped.

DISA Rule

SV-81923r3_rule

Vulnerability Number

V-67433

Group Title

SRG-APP-000501-DB-000336

Rule Version

SQL4-00-037100

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Where SQL Server Trace is in use, define and enable a trace that captures all auditable events. The script provided in the supplemental file Trace.sql can be used to do this.

Add blocks of code to Trace.sql for each custom event class (integers in the range 82-91; the same event class may be used for all such triggers) used in these triggers.

Create triggers to raise a custom event on each locally-defined security table that requires tracking of Insert-Update-Delete operations. The examples provided in the supplemental file CustomTraceEvents.sql can serve as the basis for these.

Execute Trace.sql.

Where SQL Server Audit is in use, design and deploy a SQL Server Audit that captures all auditable events. The script provided in the supplemental file Audit.sql can be used for this.

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

Check Contents

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

If there are no locally-defined security tables or procedures, this is not a finding.

If SQL Server Trace is in use for audit purposes, verify that all required events are being audited. From the query prompt:
SELECT * FROM sys.traces;
All currently defined traces for the SQL server instance will be listed.

If no traces are returned, this is a finding.

Determine the trace(s) being used for the auditing requirement.
In the following, replace # with a trace ID being used for the auditing requirements.
From the query prompt:
SELECT DISTINCT(eventid) FROM sys.fn_trace_geteventinfo(#);

The following required event IDs should all be among those listed; if not, this is a finding:

46 -- Object:Created
47 -- Object:Deleted
162 -- User error message
164 -- Object:Altered

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_CHANGE_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
<server name> >> Security >> Audits
and
<server name> >> Security >> Server Audit Specifications.
Also,
<server name> >> Databases >> <database name> >> Security >> Database Audit Specifications.

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

Run the following to verify that all CREATE, ALTER, and DROP actions on any locally-defined permissions tables, procedures and functions 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] = '<server_audit_specification_name>')
AND audit_action_name = 'SCHEMA_OBJECT_CHANGE_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.

Vulnerability Number

V-67433

Documentable

False

Rule Version

SQL4-00-037100

Severity Override Guidance

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

If there are no locally-defined security tables or procedures, this is not a finding.

If SQL Server Trace is in use for audit purposes, verify that all required events are being audited. From the query prompt:
SELECT * FROM sys.traces;
All currently defined traces for the SQL server instance will be listed.

If no traces are returned, this is a finding.

Determine the trace(s) being used for the auditing requirement.
In the following, replace # with a trace ID being used for the auditing requirements.
From the query prompt:
SELECT DISTINCT(eventid) FROM sys.fn_trace_geteventinfo(#);

The following required event IDs should all be among those listed; if not, this is a finding:

46 -- Object:Created
47 -- Object:Deleted
162 -- User error message
164 -- Object:Altered

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_CHANGE_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
<server name> >> Security >> Audits
and
<server name> >> Security >> Server Audit Specifications.
Also,
<server name> >> Databases >> <database name> >> Security >> Database Audit Specifications.

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

Run the following to verify that all CREATE, ALTER, and DROP actions on any locally-defined permissions tables, procedures and functions 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] = '<server_audit_specification_name>')
AND audit_action_name = 'SCHEMA_OBJECT_CHANGE_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 Content Reference

M

Target Key

2637

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