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V-268481

CAT II (Medium)

The macOS system must disable Bonjour multicast.

Rule ID

SV-268481r1034383_rule

STIG

Apple macOS 15 (Sequoia) Security Technical Implementation Guide

Version

V1R7

CCIs

CCI-000381

Discussion

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

Check Content

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

Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.