Vulnerability Discussion

The macOS built-in FaceTime.app must be disabled.

The FaceTime.app establishes a connection to Apple's iCloud service, even when security controls have been put in place to disable iCloud access.

[IMPORTANT]
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Apple has deprecated the use of application restriction controls (https://github.com/apple/device-management/blob/eb51fb0cb9626cac4717858556912c257a734ce0/mdm/profiles/com.apple.applicationaccess.new.yaml#L67-L70). Using these controls may not work as expected. Third-party software may be required to fulfill the compliance requirements.
====

Check

Verify the macOS system is configured to disable FaceTime.app with the following command:

/usr/bin/osascript -l JavaScript << EOS
function run() {
let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\
.objectForKey('familyControlsEnabled'))
let pathlist = $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess.new')\
.objectForKey('pathBlackList').js
for ( let app in pathlist ) {
if ( ObjC.unwrap(pathlist[app]) == "/Applications/FaceTime.app" && pref1 == true ){
return("true")
}
}
return("false")
}
EOS

If the result is not "true", this is a finding.

Fix

Configure the macOS system to disable FaceTime.app by installing the "com.apple.applicationaccess.new" configuration profile.