Cis Ubuntu1804 V220 1 6 1 4

1.6.1.4 Ensure all AppArmor Profiles are enforcing (Automated)

Profile Applicability

• Level 2 - Server
• Level 2 - Workstation

Description

AppArmor profiles define what resources applications are able to access.

Rationale

Security configuration requirements vary from site to site. Some sites may mandate a policy that is stricter than the default policy, which is perfectly acceptable. This item is intended to ensure that any policies that exist on the system are activated.

Audit Procedure

Command Line

Run the following commands and verify that profiles are loaded and are not in complain mode:

apparmor_status | grep profiles

Review output and ensure that profiles are loaded, and in enforce mode:

34 profiles are loaded.
34 profiles are in enforce mode.
0 profiles are in complain mode.
2 processes have profiles defined.

Run the following command and verify that no processes are unconfined:

apparmor_status | grep processes

Expected Result

2 processes have profiles defined.
2 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.

Remediation

Command Line

Run the following command to set all profiles to enforce mode:

aa-enforce /etc/apparmor.d/*

Note: Any unconfined processes may need to have a profile created or activated for them and then be restarted.

References

1. NIST SP 800-53 Rev. 5: AC-3

CIS Controls

MITRE ATT&CK Mappings