cis-docker-3-11

name	cis-docker-3.11
description	Ensure that Docker server certificate 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	3.11
cis_benchmark	CIS Docker Benchmark v1.8.0
tech_stack	["linux","docker"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

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

Profile Applicability

• Level 1 - Docker - Linux

Description

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

Rationale

The Docker server certificate file should be protected from any tampering. It is used to authenticate the Docker server based on the given server certificate. It must therefore be individually owned and group owned by root to prevent modification by less privileged users.

Impact

None.

Audit Procedure

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

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

The above command should return no results.

Remediation

You should run the following command:

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

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

Default Value

By default, the ownership and group-ownership for Docker server certificate 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