macOS 15 - Sequoia

The macOS system must disable Bonjour multicast

STIG ID: APPL-15-002005 | SRG: SRG-OS-000095-GPOS-00049 | Severity: Medium | CCI: CCI-000381 | Vulnerability ID: V-268481

Description

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

Check

C-268481r1034383_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').jsEOSIf the result is not "true", this is a finding.

Fix

F-72412r1034382_fix

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