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WN25-00-000230 Windows Server 2025 nonsystem-created file shares must limit access to groups that require it.

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

Maps to SC-4 via CCI-001090

Title

Windows Server 2025 nonsystem-created file shares must limit access to groups that require it.

Control

If only system-created shares such as "ADMIN$", "C$", and "IPC$" exist on the system, this is not applicable. (System-created shares will display a message that it has been shared for administrative purposes when "Properties" is selected.) Run "Computer Management". Navigate to System Tools >> Shared Folders >> Shares. Right-click any nonsystem-created shares. Select "Properties". Select the "Share Permissions" tab. If the file shares have not been configured to restrict permissions to the specific groups or accounts that require access, this is a finding. Select the "Security" tab. If the permissions have not been configured to restrict permissions to the specific groups or accounts that require access, this is a finding.

Discussion

Shares on a system provide network access. To prevent exposing sensitive information, where shares are necessary, permissions must be reconfigured to give the minimum access to accounts that require it.

Related controls

CCI-001090

Fix

If a nonsystem-created share is required on a system, configure the share and NTFS permissions to limit access to the specific groups or accounts that require it. Remove any unnecessary nonsystem-created shares.