cis-docker-3-2

name	cis-docker-3.2
description	Ensure that docker.service file permissions are appropriately set
category	cis-docker
version	1.8.0
author	cyberstrike-official
tags	["cis","docker","linux","containers","daemon-files","file-permissions","ownership"]
cis_id	3.2
cis_benchmark	CIS Docker Benchmark v1.8.0
tech_stack	["linux","docker"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

Ensure that docker.service file permissions are appropriately set (Automated)

Profile Applicability

• Level 1 - Docker - Linux

Description

You should verify that the docker.service file permissions are either set to 644 or to a more restrictive value.

Rationale

The docker.service file contains sensitive parameters that may alter the behavior of the Docker daemon. It should therefore not be writable by any other user other than root in order to ensure that it can not be modified by less privileged users.

Impact

None.

Audit Procedure

Step 1: Find out the file location:

systemctl show -p FragmentPath docker.service

Step 2: If the file does not exist, this recommendation is not applicable. If the file exists, execute the command below, including the correct file path in order to verify that the file permissions are set to 644 or a more restrictive value.

For example:

stat -c %a /usr/lib/systemd/system/docker.service

Remediation

Step 1: Find out the file location:

systemctl show -p FragmentPath docker.service

Step 2: If the file does not exist, this recommendation is not applicable. If the file exists, execute the command below including the correct file path to set the file permissions to 644.

For example:

chmod 644 /usr/lib/systemd/system/docker.service

Default Value

This file may not be present on the system. In that case, this recommendation is not applicable. By default, if the file is present, the file permissions are correctly set to 644.

References

1. https://docs.docker.com/articles/systemd/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists - Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications.