Title

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

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 Content

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.

Fix Text

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.

Additional Identifiers

Rule ID: SV-277086r1148710_rule

Vulnerability ID: V-277086

Group Title: SRG-OS-000080-GPOS-00048

Expert Comments

CCIs tied to check.

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