Ensure root is the only GID 0 account

MoyenneNiveau 1Automatiséelinux

Description

An account's primary group is identified by the group ID (GID) in its /etc/passwd entry. GID 0 is the root group, which the root account uses as its primary group by default.

Méthode de vérification

Méthode d'audit: Commande shell

shell

alt0() { command -v awk >/dev/null 2>&1 || { echo "step1: awk not installed"; return 1; }; o=$(bash -c 'awk -F: '"'"'($4 == 0) { print $1 }'"'"' /etc/passwd' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'root should be returned; the default system accounts sync, shutdown, halt, and' || { echo step1: missing 'root should be returned; the default system accounts sync, s'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'operator may also be returned.' || { echo step1: missing 'operator may also be returned.'; return 1; }; }; if alt0; then echo compliant; fi

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Run the following command to reassign any account other than root that has primary GID 0 to an appropriate group: # usermod -g <NEW_GID> <username> Example: # usermod -g 100 bsmith If the root account's primary GID is not 0, run the following command to reset it: # usermod -g 0 root

Propriétés

Systèmes d'exploitation: rhel-9
Étiquettes: cis-convertedlinux
Référence: CIS Red Hat Enterprise Linux 9 Benchmark v3.0.0 - 5.4.2.2

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell

tmaegis scan --target linux