cis-docker-3-13

name	cis-docker-3.13
description	Ensure that the Docker server certificate key file ownership is set to root:root
category	cis-docker
version	1.8.0
author	cyberstrike-official
tags	["cis","docker","linux","containers","daemon-files","file-permissions","ownership"]
cis_id	3.13
cis_benchmark	CIS Docker Benchmark v1.8.0
tech_stack	["linux","docker"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

Ensure that the Docker server certificate key file ownership is set to root:root (Manual)

Profile Applicability

• Level 1 - Docker - Linux

Description

You should verify that the Docker server certificate key file (the file that is passed along with the --tlskey parameter) is individually owned and group owned by root.

Rationale

The Docker server certificate key file should be protected from any tampering or unneeded reads/writes. As it holds the private key for the Docker server certificate, it must be individually owned and group owned by root to ensure that it cannot be accessed by less privileged users.

Impact

None.

Audit Procedure

You should execute the command below to verify that the Docker server certificate key file is individually owned and group owned by root:

stat -c %U:%G <path to Docker server certificate key file> | grep -v root:root

The command above should return no results.

Remediation

You should execute the following command:

chown root:root <path to Docker server certificate key file>

This sets the individual ownership and group ownership for the Docker server certificate key file to root.

Default Value

By default, the individual ownership and group ownership for the Docker server certificate key file is correctly set to root.

References

1. https://docs.docker.com/registry/insecure/
2. https://docs.docker.com/engine/security/https/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts - Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account.	●	●	●
v7	4 Controlled Use of Administrative Privileges - Controlled Use of Administrative Privileges