macOS 26 - Tahoe

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

STIG ID: APPL-26-002003 | SRG: SRG-OS-000080-GPOS-00048 | Severity: Medium | CCI: CCI-000213 | Vulnerability ID: V-277086

Description

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

C-81241r1148708_chk

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

F-81146r1148709_fix

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.