Title

The macOS system must disable Screen Sharing and Apple Remote Desktop. (Cat II impact)

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.

Check Content

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.

Fix Text

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.

Additional Identifiers

Rule ID: SV-277114r1149392_rule

Vulnerability ID: V-277114

Group Title: SRG-OS-000080-GPOS-00048

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.