CIS-2.3 - Ensure that the --auto-tls argument is not set to true

Ensure that the --auto-tls argument is not set to true

Framework

CIS

Severity

Medium

Description of the the issue

etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should not be available to unauthenticated clients. You should enable the client authentication via valid certificates to secure the access to the etcd service.

Related resources

Pod

What does this control test

Do not use self-signed certificates for TLS.

How to check it manually

Run the following command on the etcd server node:

ps -ef | grep etcd

Verify that if the --auto-tls argument exists, it is not set to true.

Remediation

Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master node and either remove the --auto-tls parameter or set it to false.

--auto-tls=false

Impact Statement

Clients will not be able to use self-signed certificates for TLS.

Default Value

By default, --auto-tls is set to false.

Example

No example