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APPL-26-002005 The macOS system must disable Bonjour multicast.

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

The macOS system must disable Bonjour multicast.

Control

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.

Discussion

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

Related controls

CCI-000381

Fix

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