Ensure NFS Server Is Disabled

MédiaNível 1Automatizadamacos

Descrição

macOS can act as an NFS fileserver. NFS sharing could be enabled to allow someone on another computer to mount shares and gain access to information from the user's computer. File sharing from a user endpoint has long been considered questionable, and Apple has removed that capability from the GUI. NFSD is still part of the Operating System and can be easily turned on to export shares and provide remote connectivity to an end-user computer. The etc/exports file contains the list of NFS shared directories. If the file exists, it is likely that NFS sharing has been enabled in the past or may be available periodically. As an additional check, the audit verifies that there is no /etc/exports file. File serving should not be done from a user desktop. Dedicated servers should be used. Open ports make it easier to exploit the computer.

Como é verificado

Método de auditoria: Comando shell

shell

s=$(/sbin/nfsd status 2>/dev/null | /usr/bin/awk '/nfsd service/ { print $NF }') || exit 1
if [ "$s" = disabled ] && [ ! -e /etc/exports ]; then echo compliant; else echo "nfsd=${s:-unknown}; /etc/exports present or service enabled"; fi

Saída esperada: compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

Terminal Method: Run the following command to disable the nfsd fileserver services: % /usr/bin/sudo /bin/launchctl disable system/com.apple.nfsd Remove the exported Directory listing. % /usr/bin/sudo /bin/rm -rf /etc/exports Note: Removing /etc/exports also stops the NFS service if it was running.

Propriedades

Sistemas operacionais: macos-14
Tags: macossonoma
Referência: CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 4.3 Ensure NFS Server Is Disabled

Verificar este host

Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.

shell

tmaegis scan --target macos