Microsoft Windows 10

The default permissions of global system objects must be increased

STIG ID: WN10-SO-000240 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Low | CCI: CCI-000366 | Vulnerability ID: V-220943

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 DACL that specifies who can access the objects with what permissions. If this policy is enabled, the default DACL is stronger, allowing non-admin users to read shared objects, but not modify shared objects that they did not create.

Check

C-220943r991589_chk

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

Fix

F-22647r555315_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".