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TMA-RHEL9-5.4.2.8

Ensure accounts without a valid login shell are locked

MediaNivel 1Automatizadalinux

Descripción

There are a number of accounts provided with most distributions that are used to manage applications. Additionally, an administrator may add special accounts that are not intended for interactive use.

Cómo se verifica

Método de auditoría: Comando de shell

shell
alt0() { o=$(bash -c '#!/usr/bin/env bash

{
   l_valid_shells="^($(awk -F\/ '"'"'($NF != "nologin" && $NF != "false") {print}'"'"' /etc/shells | sed -rn '"'"'/^\//{s,/,\\\\/,g;p}'"'"' | paste -s -d '"'"'|'"'"' - ))$"
   while IFS= read -r l_user; do
      passwd -S "$l_user" | awk '"'"'$2 !~ /^L/ {print "Account: \"" $1 "\" does not have a valid login shell and is not locked"}'"'"'
   done < <(awk -v pat="$l_valid_shells" -F: '"'"'($1 != "root" && $(NF) !~ pat) {print $1}'"'"' /etc/passwd)
}' 2>&1); [ -z "$o" ] || { echo "step1: $o" | head -c 300; return 1; }; }; if alt0; then echo compliant; fi
Salida esperada
compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Run the following command to lock any non-root accounts without a valid login shell returned by the audit: # usermod -L <user> Example script: #!/usr/bin/env bash { l_valid_shells="^($(awk -F\/ '($NF != "nologin" && $NF != "false") {print}' /etc/shells | sed -rn '/^\//{s,/,\\\\/,g;p}' | paste -s -d '|' - ))$" while IFS= read -r l_user; do passwd -S "$l_user" | awk '$2 !~ /^L/ {system ("usermod -L " $1)}' done < <(awk -v pat="$l_valid_shells" -F: '($1 != "root" && $(NF) !~ pat) {print $1}' /etc/passwd) }

Propiedades

Sistemas operativos
rhel-9
Etiquetas
cis-convertedlinux
Referencia
CIS Red Hat Enterprise Linux 9 Benchmark v3.0.0 - 5.4.2.8

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell
tmaegis scan --target linux