cyberstrikeus 4.1.2 Ensure that the kubelet service file ownership is set to root:root (Automated)
Profile Applicability
- Level 1 - Worker Node
Description
Ensure that the kubelet service file ownership is set to root:root.
Rationale
The kubelet service file controls various parameters that set the behavior of the kubelet service in the worker node. You should set its file ownership to maintain the integrity of the file. The file should be owned by root:root.
Impact
None
Audit
Automated AAC auditing has been modified to allow CIS-CAT to input a variable for the <PATH>/<FILENAME> of the kubelet service config file.
Please set $kubelet_service_config=<PATH> based on the file location on your system for example:
export kubelet_service_config=/etc/systemd/system/kubelet.service.d/kubeadm.conf
To perform the audit manually: Run the below command (based on the file location on your system) on the each worker node. For example,
stat -c %U:%G /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
Verify that the ownership is set to root:root.
Remediation
Run the below command (based on the file location on your system) on the each worker node. For example,
chown root:root /etc/systemd/system/kubelet.service.d/kubeadm.conf
Default Value
By default, kubelet service file ownership is set to root:root.
References
- https://kubernetes.io/docs/admin/kubelet/
- https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/#44-joining-your-nodes
- https://kubernetes.io/docs/admin/kubeadm/#kubelet-drop-in
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts | x | x | x |
| v7 | 4 Controlled Use of Administrative Privileges |