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WN25-SO-000370 Windows Server 2025 default permissions of global system objects must be strengthened.

DISA STIG library V1R4
All changes in this version
first version loaded CAT III

Maps to CM-6 via CCI-000366

Title

Windows Server 2025 default permissions of global system objects must be strengthened.

Control

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: ProtectionMode Value Type: REG_DWORD Value: 0x00000001 (1)

Discussion

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 nonadministrative users to read shared objects but not to modify shared objects they did not create.

Related controls

CCI-000366

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".