Docker Enterprise registry certificate file ownership must be set to root:root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235857	DKER-EE-005230	SV-235857r627698_rule		High

Description
Verify that all the registry certificate files (usually found under /etc/docker/certs.d/<registry-name> directory) are owned and group-owned by root. /etc/docker/certs.d/<registry-name> directory contains Docker registry certificates. These certificate files must be owned and group-owned by root to maintain the integrity of the certificates. By default, the ownership and group-ownership for registry certificate files is correctly set to root.

Description

Verify that all the registry certificate files (usually found under /etc/docker/certs.d/<registry-name> directory) are owned and group-owned by root. /etc/docker/certs.d/<registry-name> directory contains Docker registry certificates. These certificate files must be owned and group-owned by root to maintain the integrity of the certificates. By default, the ownership and group-ownership for registry certificate files is correctly set to root.

STIG	Date
Docker Enterprise 2.x Linux/UNIX Security Technical Implementation Guide	2021-03-26

Details

Check Text ( C-39076r627696_chk )
Ensure that registry certificate file ownership is set to root:root. Execute the below command to verify that the registry certificate files are owned and group-owned by root: stat -c %U:%G /etc/docker/certs.d/* If the certificate files are not owned by root, this is a finding.

Fix Text (F-39039r627697_fix)
Set the ownership and group-ownership for the registry certificate files to root. Run the following command: chown root:root /etc/docker/certs.d//*