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Standard user accounts must only have Read permissions to the Winlogon registry key.


Overview

Finding ID Version Rule ID IA Controls Severity
V-26070 2.023 SV-33308r3_rule High
Description
Permissions on the Winlogon registry key must only allow privileged accounts to change registry values. If standard users have this capability there is a potential for programs to run with elevated privileges when a privileged user logs on to the system.
STIG Date
Windows 2008 Member Server Security Technical Implementation Guide 2018-05-25

Details

Check Text ( C-74021r2_chk )
Run "Regedit".
Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\

Right-click on "WinLogon" and select "Permissions…".
Select "Advanced".

If the permissions are not as restrictive as the defaults listed below, this is a finding.

The following are the same for each permission listed:
Type - Allow
Inherited from - MACHINE\SOFTWARE

Columns: Name - Permission - Apply to
Users - Read - This key and subkeys
Administrators - Full Control - This key and subkeys
SYSTEM - Full Control - This key and subkeys
CREATOR OWNER - Special - Subkeys only
(Special = Full Control)
Fix Text (F-80417r1_fix)
Maintain permissions at least as restrictive as the defaults listed below for the "WinLogon" registry key. It is recommended to not change the permissions from the defaults.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\

The following are the same for each permission listed:
Type - Allow
Inherited from - MACHINE\SOFTWARE

Columns: Name - Permission - Apply to
Users - Read - This key and subkeys
Administrators - Full Control - This key and subkeys
SYSTEM - Full Control - This key and subkeys
CREATOR OWNER - Special - Subkeys only
(Special = Full Control)