Linux distributions
TMA-RHEL9-5.4.2.8
Ensure accounts without a valid login shell are locked
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
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.
tmaegis scan --target linux