Ensure a Login Window Banner Exists

MédiaNível 2Automatizadamacos

Descrição

A Login window banner warning informs the user that the system is reserved for authorized use only. It enforces an acknowledgment by the user that they have been informed of the use policy in the banner if required. The system recognizes either the .txt and the .rtf formats. An access warning may reduce a casual attacker's tendency to target the system. Access warnings may also aid in the prosecution of an attacker by evincing the attacker's knowledge of the system's private status, acceptable use policy, and authorization requirements.

Como é verificado

Método de auditoria: Comando shell

shell

set -- /Library/Security/PolicyBanner.*
[ -e "$1" ] || exit 1
for f in "$@"; do
  p=$(/usr/bin/stat -f %A "$f") || exit 1
  case "$p" in ??4) ;; *) echo "$f mode $p"; exit 0;; esac
done
echo compliant

Saída esperada: compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

Terminal Method: Run the following commands to create or edit the login window text and set the proper permissions: Edit (or create) a PolicyBanner.txt or PolicyBanner.rtf file, in the /Library/Security/ folder, to include the required login window banner text. Perform the following to set permissions on the policy banner file: % /usr/bin/sudo /bin/chmod o+r /Library/Security/PolicyBanner.txt % /usr/bin/sudo /bin/chmod o+r /Library/Security/PolicyBanner.rtf Note: If your organization uses an .rtfd file to set the policy banner, run % /usr/bin/sudo /bin/chmod o+rx /Library/Security/PolicyBanner.rtfd to update the permissions.

Propriedades

Sistemas operacionais: macos-14
Tags: loggingmacossonoma
Referência: CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 5.8 Ensure a Login Window Banner Exists

Verificar este host

Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.

shell

tmaegis scan --target macos --level 2