TMA-AIX-4.4.1.3
Ensure NFS client mounts include nosuid and nodev options
Beschreibung
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.
So wird geprüft
Prüfmethode: Shell-Befehl
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- Erwartete Ausgabe
compliant
So wird behoben
Behebungsmethode: Anleitung oder Infrastruktur-Patch
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)
Eigenschaften
- Betriebssysteme
- Beliebig
- Tags
- aixnetwork
- Referenz
- 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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