Details
Configure AppArmor to be enabled at boot time and verify that it has not been overwritten by the bootloader boot parameters.
Note: This recommendation is designed around the grub2 bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.
Rationale:
AppArmor must be enabled at boot time in your bootloader configuration to ensure that the controls it provides are not overridden.
Solution
Edit /etc/default/grub and add the apparmor=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:
# grub2-mkconfig -o /boot/grub2/grub.cfg
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Access Control, Media Protection.This control applies to the following type of system Unix.