Global object access auditing of the file system must be configured to record failures.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
WN12-AU-000114	WN12-AU-000114	WN12-AU-000114_rule		Medium

Description
Improper modification of system files can have a significant impact on the security configuration of a system, as well as potentially rendering a system inoperable. Failed access attempts may indicate an attack on a system. Auditing for failed access attempts provides an indicator of such attempts and a method of determining responsible parties.

STIG	Date
Microsoft Windows Server 2012 Domain Controller Security Technical Implementation Guide	2013-07-25

Details

Check Text ( C-WN12-AU-000114_chk )
If "Object Access -> File System" auditing is not properly configured (V-26544), or if drives are not formatted with NTFS (V-1081), this is a finding. If "Global Object Access Auditing" of the file system has not been configured to audit all failed access attempts for the "Everyone" group, this is a finding. Use the AuditPol tool to review the current configuration. Open a Command Prompt with elevated privileges ("Run as Administrator"). Enter "Auditpol /resourceSACL /type:File /view". ("File" in the /type parameter is case sensitive). The following results should be displayed: Entry: 1 Resource Type: File User: Everyone Flags: Failure Condition: Accesses: FILE_READ_DATA FILE_WRITE_DATA FILE_APPEND_DATA FILE_READ_EA FILE_WRITE_EA FILE_EXECUTE FILE_DELETE_CHILD FILE_READ_ATTRIBUTES FILE_WRITE_ATTRIBUTES DELETE READ_CONTROL WRITE_DAC WRITE_OWNER The command was successfully executed.

Check Text ( C-WN12-AU-000114_chk )

If "Object Access -> File System" auditing is not properly configured (V-26544), or if drives are not formatted with NTFS (V-1081), this is a finding.

If "Global Object Access Auditing" of the file system has not been configured to audit all failed access attempts for the "Everyone" group, this is a finding.

Use the AuditPol tool to review the current configuration.
Open a Command Prompt with elevated privileges ("Run as Administrator").
Enter "Auditpol /resourceSACL /type:File /view". ("File" in the /type parameter is case sensitive).

The following results should be displayed:

Entry: 1
Resource Type: File
User: Everyone
Flags: Failure
Condition:
Accesses:
FILE_READ_DATA
FILE_WRITE_DATA
FILE_APPEND_DATA
FILE_READ_EA
FILE_WRITE_EA
FILE_EXECUTE
FILE_DELETE_CHILD
FILE_READ_ATTRIBUTES
FILE_WRITE_ATTRIBUTES
DELETE
READ_CONTROL
WRITE_DAC
WRITE_OWNER

The command was successfully executed.

Fix Text (F-WN12-AU-000114_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Advanced Audit Policy Configuration -> System Audit Policies -> Global Object Access Auditing -> "File system" with the following: Principal: Everyone Type: Fail Permissions: all categories selected If this is configured on a domain controller, in local or group policy, do not set any conditions limiting the scope.

Fix Text (F-WN12-AU-000114_fix)

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Advanced Audit Policy Configuration -> System Audit Policies -> Global Object Access Auditing -> "File system" with the following:

Principal: Everyone
Type: Fail
Permissions: all categories selected

If this is configured on a domain controller, in local or group policy, do not set any conditions limiting the scope.