Title

The macOS system must disable Bonjour multicast. (Cat II impact)

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.

Additional Identifiers

Rule ID: SV-259481r958478_rule

Vulnerability ID: V-259481

Group Title: SRG-OS-000095-GPOS-00049

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.