cis-docker-v170-3-7

name	cis-docker-v170-3.7
description	Ensure that registry 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","registry","certificates"]
cis_id	3.7
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 3.7

Description

You should verify that all the registry certificate files (usually found under /etc/docker/certs.d/<registry-name> directory) are individually owned and group owned by root.

Rationale

The /etc/docker/certs.d/<registry-name> directory contains Docker registry certificates. These certificate files must be individually owned and group owned by root to ensure that less privileged users are unable to modify the contents of the directory.

Impact

None.

Audit Procedure

You should execute the command below to verify that the registry certificate files are individually owned and group owned by root:

stat -c %U:%G /etc/docker/certs.d/* | grep -v root:root

The above command should not return any value.

Remediation

The following command could be executed:

chown root:root /etc/docker/certs.d/<registry-name>/*

This would set the individual ownership and group ownership for the registry certificate files to root.

Default Value

By default, the individual ownership and group ownership for registry certificate files is correctly set to root.

References

1. https://docs.docker.com/registry/insecure/

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

Manual