Ensure AppArmor is enabled in the bootloader configuration

MediaNivel 1Automatizadaros

Descripción

Configure AppArmor to be enabled at boot time and verify that it has not been overwritten by the bootloader boot parameters. The audit requires apparmor=1 and security=apparmor on every linux line of /boot/grub/grub.cfg. Host-level control from the CIS ROS Melodic benchmark (Ubuntu 18.04 robot hosts); run as root.

Cómo se verifica

Método de auditoría: Comando de shell

shell

f=/boot/grub/grub.cfg; [ -r "$f" ] || f=/boot/grub2/grub.cfg; [ -r "$f" ] || exit 1
l=$(grep -E '^\s*linux' "$f" | grep -v '/boot/memtest86+')
[ -n "$l" ] || { echo 'no linux lines in grub.cfg'; exit 1; }
bad=$(printf '%s\n' "$l" | grep -Ev '(\s)apparmor=1(\s|$)')
[ -z "$bad" ] && { printf '%s\n' "$l" | grep -Ev '(\s)security=apparmor(\s|$)' | grep -q . && echo 'kernel lines without security=apparmor' || echo compliant; } || echo 'kernel lines without apparmor=1'

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

edit /etc/default/grub and add the appermor=1 and security=apparmor parameters to the GRUB_CMDLINE_LINUX= line GRUB_CMDLINE_LINUX="apparmor=1 security=apparmor" Run the following command to update the grub2 configuration: # update-grub

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: rosros1melodicsystem
Referencia: CIS ROS Melodic Benchmark v1.0.0 - 1.7.1.2 Ensure AppArmor is enabled in the bootloader configuration

Verificar este host

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

shell

tmaegis scan --target ros