Ensure NFS Server Is Disabled

보통레벨 1자동macos

설명

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.

점검 방법

감사 방식: 셸 명령

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

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

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.

속성

운영 체제: macos-14
태그: macossonoma
참고 자료: CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 4.3 Ensure NFS Server Is Disabled

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shell

tmaegis scan --target macos