Title

The macOS system must be configured to disable the Network File System (NFS) daemon unless it is required. (Cat II impact)

Discussion

If the system does not require access to NFS file shares or is not acting as an NFS server, support for NFS is non-essential and NFS services must be disabled. NFS is a network file system protocol supported by UNIX-like operating systems. Enabling any service increases the attack surface for an intruder. By disabling unnecessary services, the attack surface is minimized.

Check Content

If the NFS daemon is required, this is not applicable. To check if the NFS daemon is disabled, use the following command: /bin/launchctl print-disabled system | /usr/bin/grep com.apple.nfsd If the results do not show the following, this is a finding: "com.apple.nfsd" => true

Fix Text

To disable the NFS daemon, run the following command: /usr/bin/sudo /bin/launchctl disable system/com.apple.nfsd The system may need to be restarted for the update to take effect.

Additional Identifiers

Rule ID: SV-230788r599842_rule

Vulnerability ID: V-230788

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.