Microsoft Windows Server 2019

Windows Server 2019 default permissions of global system objects must be strengthened

STIG ID: WN19-SO-000370 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Low | CCI: CCI-000366 | Vulnerability ID: V-205923

Description

Windows systems maintain a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each type of object is created with a default Discretionary Access Control List (DACL) that specifies who can access the objects with what permissions. When this policy is enabled, the default DACL is stronger, allowing non-administrative users to read shared objects but not to modify shared objects they did not create.

Check

C-205923r991589_chk

If the following registry value does not exist or is not configured as specified, this is a finding:Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Session Manager\Value Name: ProtectionModeValue Type: REG_DWORDValue: 0x00000001 (1)

Fix

F-6188r356132_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "System objects: Strengthen default permissions of internal system objects (e.g., Symbolic Links)" to "Enabled".