The macOS system must disable Network File System (NFS) service.

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.

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

isDisabled=$(/sbin/nfsd status | /usr/bin/awk '/nfsd service/ {print $NF}') if [[ "$isDisabled" == "disabled" ]] && [[ -z $(/usr/bin/pgrep nfsd) ]]; then echo "pass" else echo "fail" fi

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

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

/bin/launchctl disable system/com.apple.nfsd /bin/rm -rf /etc/exports

The system may need a restart for the update to take effect.