The macOS system must disable Bonjour multicast.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259481	APPL-14-002005	SV-259481r941065_rule		Medium

Description
Bonjour multicast advertising must be disabled to prevent the system from broadcasting its presence and available services over network interfaces.

STIG	Date
Apple macOS 14 (Sonoma) Security Technical Implementation Guide	2024-01-10

Details

Check Text ( C-63220r941063_chk )
Verify the macOS system is configured to disable Bonjour multicast with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.mDNSResponder')\ .objectForKey('NoMulticastAdvertisements').js EOS If the result is not "true", this is a finding.

Fix Text (F-63128r941064_fix)
Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.