cis-docker-v170-3-9

name	cis-docker-v170-3.9
description	Ensure that TLS CA certificate file ownership is set to root:root
category	cis-docker
version	1.7.0
author	cyberstrike-official
tags	["cis","docker","daemon","files","permissions","ownership","tls","certificates"]
cis_id	3.9
cis_benchmark	CIS Docker Benchmark v1.7.0
tech_stack	["docker"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

CIS Docker Benchmark v1.7.0 - Control 3.9

Description

You should verify that the TLS CA certificate file (the file that is passed along with the --tlscacert parameter) is individually owned and group owned by root.

Rationale

The TLS CA certificate file should be protected from any tampering. It is used to authenticate the Docker server based on a given CA certificate. It must be therefore be individually owned and group owned by root to ensure that it cannot be modified by less privileged users.

Impact

None.

Audit Procedure

You should execute the command below to verify that the TLS CA certificate file is owned and group owned by root:

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

The above command should return no results.

Remediation

You should execute the following command:

chown root:root <path to TLS CA certificate file>

This sets the individual ownership and group ownership for the TLS CA certificate file to root.

Default Value

By default, the ownership and group-ownership for TLS CA 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

Profile Applicability

• Level 1 - Docker - Linux

Assessment Status