Ensure nologin is not listed in /etc/shells

FaibleNiveau 2Automatiséelinux

Description

/etc/shells is a text file which contains the full pathnames of valid login shells. This file is consulted by chsh and available to be queried by other programs. Be aware that there are programs which consult this file to find out if a user is a normal user; for example, FTP daemons traditionally disallow access to users with shells not included in this file.

Méthode de vérification

Méthode d'audit: Commande shell

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; o=$(bash -c 'grep -Ps '"'"'^\h*([^#\n\r]+)?\/nologin\b'"'"' /etc/shells' 2>/dev/null); [ -z "$o" ] || { echo "step1: $o" | head -c 300; return 1; }; }; if alt0; then echo compliant; fi

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Edit /etc/shells and remove any lines that include nologin

Propriétés

Systèmes d'exploitation: ubuntu-20.04
Étiquettes: cis-convertedlinux
Référence: CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 - 5.4.3.1

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 --level 2