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IBM AIX

TMA-AIX-4.4.1.3

Ensure NFS client mounts include nosuid and nodev options

AltaNível 1Automatizadaaix

Descrição

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.

Como é verificado

Método de auditoria: Comando shell

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
Saída esperada
compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

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)

Propriedades

Sistemas operacionais
Qualquer
Tags
aixnetwork
Referência
CIS IBM AIX 7 Benchmark v1.2.0 - 4.4.1.3 Ensure NFS client mounts include nosuid and nodev options

Verificar este host

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

shell
tmaegis scan --target aix