TMA-AIX-4.4.1.3

Ensure NFS client mounts include nosuid and nodev options

높음레벨 1자동aix

설명

When using NFS shares ensure that suid/sgid program execution and/or access to system devices via permissions set on any mounted NFS filesystem are disabled. Setting the nosuid and nodev options means that files on the NFS server cannot be used to gain privileged access on the client. Audit: automated read-only check derived from the CIS audit procedure; it prints "compliant" when the control is met.

점검 방법

감사 방식: 셸 명령

shell

command -v lsnfsmnt >/dev/null 2>&1 || exit 1; out=$( { lsnfsmnt -l | egrep -v "^Name" | grep -v nosuid; lsnfsmnt -l | egrep -v "^Name" | grep -v nodev ; } 2>/dev/null ); [ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 20

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

For each NFS mount, disable suid programs and device access. List the current NFS mounts: lsnfsmnt -l | /usr/bin/egrep -v "^Name" | /usr/bin/grep -v "nosuid" | while read remote server mntpnt rest; do chnfsmnt -d ${remote} -f ${mntpnt} -h ${server} -y -z done lsnfsmnt -l | /usr/bin/egrep -v "^Name" | /usr/bin/grep -v "nodev" | while read remote server mntpnt rest; do chnfsmnt -d ${remote} -f ${mntpnt} -h ${server} -y -z done NOTE: The NFS mount needs is re-mounted automatically by chnfsmnt. NOTE: The second loop might not do anything as both loops set both nosuid (-y) and nodev (-z)

속성

운영 체제: 모두
태그: aixnetwork
참고 자료: CIS IBM AIX 7 Benchmark v1.2.0 - 4.4.1.3 Ensure NFS client mounts include nosuid and nodev options

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shell

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