The macOS system must disable Bonjour multicast.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-277088 | APPL-26-002005 | SV-277088r1148716_rule | CCI-000381 | 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 26 (Tahoe) Security Technical Implementation Guide | 2026-02-11 | |||
Details
Check Text (C-277088r1148716_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-81148r1148715_fix)
Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.