cis-ubuntu2004-v300-1-3-1-3

name	cis-ubuntu2004-v300-1-3-1-3
description	Ensure all AppArmor Profiles are not disabled
category	cis-iam
version	3.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-20.04","apparmor","profiles","mandatory-access-control"]
cis_id	1.3.1.3
cis_benchmark	CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

1.3.1.3 Ensure all AppArmor Profiles are not disabled (Automated)

Profile

• Level 1 - Server
• Level 1 - 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 command and verify that profiles are loaded, and are in either enforce or complain mode:

# apparmor_status | grep profiles

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

37 profiles are loaded.
35 profiles are in enforce mode.
2 profiles are in complain mode.
4 processes have profiles defined.

Run the following command and verify no processes are unconfined:

# apparmor_status | grep processes

Review the output and ensure no processes are unconfined:

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

Expected Result

• Profiles should be loaded and in either enforce or complain mode
• No processes should be unconfined

Remediation

Command Line

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

# aa-enforce /etc/apparmor.d/*

• OR -

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

# aa-complain /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

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists