Cis Ubuntu1604 V200 1 6 1 2

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

Assessment Status

Automated