Ensure password hashing algorithm is SHA-512

MediaNivel 1Automatizadalinux

Descripción

The commands below change password encryption from md5 to sha512 (a much stronger hashing algorithm). All existing accounts will need to perform a password change to upgrade the stored hashes to the new algorithm.

Cómo se verifica

Método de auditoría: Comando de shell

shell

alt0() { command -v egrep >/dev/null 2>&1 || { echo "step1: egrep not installed"; return 1; }; o=$(bash -c 'egrep '"'"'^password\s+sufficient\s+pam_unix.so'"'"' /etc/pam.d/password-auth' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'password sufficient pam_unix.so sha512' || { echo step1: missing 'password sufficient pam_unix.so sha512'; return 1; }; command -v egrep >/dev/null 2>&1 || { echo "step2: egrep not installed"; return 1; }; o=$(bash -c 'egrep '"'"'^password\s+sufficient\s+pam_unix.so'"'"' /etc/pam.d/system-auth' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'password sufficient pam_unix.so sha512' || { echo step2: missing 'password sufficient pam_unix.so sha512'; return 1; }; }; if alt0; then echo compliant; fi

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Edit the /etc/pam.d/password-auth and /etc/pam.d/system-auth files to include the sha512 option for pam_unix.so as shown: password sufficient pam_unix.so sha512

Propiedades

Sistemas operativos: alinux-2
Etiquetas: cis-convertedlinux
Referencia: CIS Aliyun Linux 2 Benchmark v1.0.0 ARCHIVE - 5.3.4

Verificar este host

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

shell

tmaegis scan --target linux