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system_settings_screen_sharing_disable Disable Screen Sharing and Apple Remote Desktop

NIST macOS Security Compliance Project Tahoe Guidance, Revision 3.0 (cf656e8)
All changes in this version
first version loaded System Settings

Title

Disable Screen Sharing and Apple Remote Desktop

Control

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

Discussion

Support for both Screen Sharing and Apple Remote Desktop (ARD) is non-essential and _MUST_ be disabled.

The information system _MUST_ be configured to provide only essential capabilities. Disabling screen sharing and ARD helps prevent the unauthorized connection of devices, the unauthorized transfer of information, and unauthorized tunneling.

Related controls

ac-17, ac-3

Fix

[source,bash]
----
/bin/launchctl bootout system/com.apple.screensharing
/bin/launchctl disable system/com.apple.screensharing
----
NOTE - This will apply to the whole system