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APPL-26-002050 The macOS system must disable Screen Sharing and Apple Remote Desktop.

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 Screen Sharing and Apple Remote Desktop.

Control

Verify the macOS system is configured to disable Screen Sharing and Apple Remote Desktop with the following command: result="FAIL" enabled=$(/bin/launchctl print-disabled system | /usr/bin/grep '"com.apple.screensharing" => enabled') running=$(/bin/launchctl print system/com.apple.screensharing 2>/dev/null) if [[ -z "$running" ]] && [[ -z "$enabled" ]]; then result="PASS" elif [[ -n "$running" ]]; then result=result+" RUNNING" elif [[ -n "$enabled" ]]; then result=result+" ENABLED" fi echo $result If the result is not "PASS", this is a finding.

Discussion

Support for both Screen Sharing and Apple Remote Desktop is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling Screen Sharing and Apple Remote Desktop helps prevent unauthorized connection of devices, transfer of information, and tunneling.

Related controls

CCI-000213

Fix

Configure the macOS system to disable Screen Sharing and Apple Remote Desktop with the following command: /bin/launchctl bootout system/com.apple.screensharing /bin/launchctl disable system/com.apple.screensharing Note: This will apply to the whole system.