Default permissions for the HKEY_LOCAL_MACHINE registry hive must be maintained.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63593	WN10-RG-000005	SV-78083r1_rule		Medium

Description
The registry is integral to the function, security, and stability of the Windows system. Changing the system's registry permissions allows the possibility of unauthorized and anonymous modification to the operating system.

STIG	Date
Windows 10 Security Technical Implementation Guide	2018-04-06

Details

Check Text ( C-64343r1_chk )

Verify the default registry permissions for the keys note below of the HKEY_LOCAL_MACHINE hive. If any non-privileged groups such as Everyone, Users or Authenticated Users have greater than Read permission, this is a finding. Run "Regedit". Right click on the registry areas noted below. Select "Permissions..." and the "Advanced" button. HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys Other samples under the noted keys may also be sampled. There may be some instances where non-privileged groups have greater than Read permission. If the defaults have not been changed, these are not a finding.

Fix Text (F-69523r1_fix)

Maintain the default permissions for the HKEY_LOCAL_MACHINE registry hive. The default permissions of the higher level keys are noted below. HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys