Vulnerability Discussion

Support for NFS services is nonessential and, therefore, must be disabled. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Check

Verify the macOS system is configured to disable NFS service with the following command:

/bin/launchctl print-disabled system | /usr/bin/grep -c '"com.apple.nfsd" => disabled'

If the result is not "1", this is a finding.

Fix

Configure the macOS system to disable NFS service with the following command:

/bin/launchctl disable system/com.apple.nfsd

The system may need to be restarted for the update to take effect.