Docker Enterprise TLS certificate authority (CA) certificate file permissions must be set to 444 or more restrictive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235860	DKER-EE-005260	SV-235860r627707_rule		Medium

Description
Verify that the TLS CA certificate file (the file that is passed along with --TLScacert parameter) has permissions of 444 or more restrictive. The TLS CA certificate file should be protected from any tampering. It is used to authenticate Docker server based on given CA certificate. Hence, it must have permissions of 444 to maintain the integrity of the CA certificate. By default, the permissions for TLS CA certificate file might not be 444. The default file permissions are governed by the system or user specific umask values.

Description

Verify that the TLS CA certificate file (the file that is passed along with --TLScacert parameter) has permissions of 444 or more restrictive. The TLS CA certificate file should be protected from any tampering. It is used to authenticate Docker server based on given CA certificate. Hence, it must have permissions of 444 to maintain the integrity of the CA certificate. By default, the permissions for TLS CA certificate file might not be 444. The default file permissions are governed by the system or user specific umask values.

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

Details

Check Text ( C-39079r627705_chk )
Ensure that TLS CA certificate file permissions are set to 444 or more restrictive. Execute the below command to verify that the TLS CA certificate file has permissions of 444 or more restrictive: stat -c %a If the permissions are not set to 444, this is a finding.

Fix Text (F-39042r627706_fix)
chmod 444 This sets the file permissions of the TLS CA file to 444.