cyberstrikeus 1.6.1.2 Ensure AppArmor is enabled in the bootloader configuration (Automated)
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
Nothing should be returned for both commands.
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
References
- NIST SP 800-53 Rev. 5: AC-3
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists | X | X | X |
| v7 | 14.6 Protect Information through Access Control Lists | X | X | X |
MITRE ATT&CK Mappings
| Techniques / Sub-techniques | Tactics | Mitigations |
|---|---|---|
| T1068, T1068.000, T1565, T1565.001, T1565.003 | TA0003 | M1026 |