CIS-1.1.21 - Ensure that the Kubernetes PKI key file permissions are set to 600

Ensure that the Kubernetes PKI key file permissions are set to 600

Note: to enable this control run Kubescape with host sensor (see here)

Framework

CIS

Severity

High

Description of the the issue

Kubernetes makes use of a number of key files as part of the operation of its components. The permissions on these files should be set to 600 to protect their integrity and confidentiality.

Related resources

What does this control test

Ensure that Kubernetes PKI key files have permissions of 600.

How to check it manually

Run the below command (based on the file location on your system) on the Control Plane node. For example,

ls -laR /etc/kubernetes/pki/*.key

Verify that the permissions are 600.

Remediation

Run the below command (based on the file location on your system) on the Control Plane node. For example,

chmod -R 600 /etc/kubernetes/pki/*.key

Impact Statement

None

Default Value

By default, the keys used by Kubernetes are set to have permissions of 600

Example

No example