CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - 1.6.1.2
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
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 grub 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.
Audit Procedure
Command Line
Run the following commands to verify that all linux lines have the apparmor=1 and security=apparmor parameters set:
grep "^\s*linux" /boot/grub/grub.cfg | grep -v "apparmor=1"
Nothing should be returned.
grep "^\s*linux" /boot/grub/grub.cfg | grep -v "security=apparmor"
Nothing should be returned.
Expected Result
Both commands should return no output, indicating all linux boot lines include apparmor=1 and security=apparmor.
Remediation
Command Line
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:
update-grub
Default Value
Not applicable.
References
None.
CIS Controls
| Controls Version | Control |
|---|
| v7 | 14.6 Protect Information through Access Control Lists |
Assessment Status
Automated
