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APPL-26-002001 The macOS system must disable Server Message Block (SMB) sharing.

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

Maps to AC-3 via CCI-000213

Title

The macOS system must disable Server Message Block (SMB) sharing.

Control

Verify the macOS system is configured to disable SMB sharing with the following command: /bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.smbd" => disabled' If the result is not "1", this is a finding.

Discussion

Support for SMB file sharing is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Related controls

CCI-000213

Fix

Configure the macOS system to disable SMB sharing with the following command: /bin/launchctl disable system/com.apple.smbd The system may need a restart for the update to take effect.