lacework-global-318
3.1.3 Ensure that the kubelet configuration file has permissions set to 644 or more restrictive (Automated)
note
This rule has been changed to automated, see Automated Rules for CIS Amazon EKS 1.1.0 for details.
Profile Applicability
• Level 1
Description
Ensure that if the kubelet refers to a configuration file with the --config
argument, that file has permissions of 644 or more restrictive.
Rationale
The kubelet reads various parameters, including security settings, from a config file specified by the --config
argument. If this file is specified you should restrict its file permissions to maintain the integrity of the file. The file should be writable by only the administrators on the system.
Impact
None.
Audit
First, SSH to the relevant worker node:
To check to see if the Kubelet Service is running:
sudo systemctl status kubelet
The output should return Active: active (running) since..
Run the following command on each node to find the appropriate Kubelet config file:
ps -ef | grep kubelet
The output of the above command should return something similar to --config /etc/kubernetes/kubelet/kubelet-config.json
which is the location of the Kubelet config file.
Run the following command:
stat -c %a /etc/kubernetes/kubelet/kubelet-config.json
The output of the above command is the Kubelet config file's permissions. Verify that the permissions are 644
or more restrictive.
Remediation
Run the following command (using the config file location identified in the Audit step):
chmod 644 /etc/kubernetes/kubelet/kubelet-config.json
References
https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/