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The Kubernetes kubeadm.conf must have file permissions set to 644 or more restrictive.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-242455 | CNTR-K8-003220 | SV-242455r754822_rule | Medium |
| Description |
|---|
| The Kubernetes kubeadm.conf contains sensitive information regarding the cluster nodes configuration. If this file can be modified, the Kubernetes Platform Plane would be degraded or compromised for malicious intent. Many of the security settings within the document are implemented through this file. |
| STIG | Date |
|---|---|
| Kubernetes Security Technical Implementation Guide | 2021-11-22 |
Details
| Check Text ( C-45730r754820_chk ) |
|---|
| Review the kubeadm.conf file : Get the path for kubeadm.conf by running: systemctl status kubelet Note the configuration file installed by the kubeadm is written to (Default Location: /etc/systemd/system/kubelet.service.d/10-kubeadm.conf) stat -c %a If the file has permissions more permissive than "644", this is a finding. |
| Fix Text (F-45688r754821_fix) |
|---|
| Change the permissions of kubeadm.conf to "644" by executing the command: chmod 644 |