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Check: CNTR-K8-003190

Kubernetes STIG: CNTR-K8-003190 (in versions v1 r11 through v1 r1)

Title

The Kubernetes kubelet KubeConfig must have file permissions set to 644 or more restrictive. (Cat II impact)

Discussion

The Kubernetes kubelet agent registers nodes with the API Server, mounts volume storage for pods, and performs health checks to containers within pods. If these files can be modified, the information system would be unaware of pod or container degradation. Many of the security settings within the document are implemented through this file.

Check Content

Review the permissions of the Kubernetes Kubelet conf by using the command: stat -c %a /etc/kubernetes/kubelet.conf If any of the files are have permissions more permissive than "644", this is a finding.

Fix Text

Change the permissions of the Kubelet to "644" by executing the command: chmod 644 /etc/kubernetes/kubelet.conf

Additional Identifiers

Rule ID: SV-242452r918197_rule

Vulnerability ID: V-242452

Group Title: SRG-APP-000516-CTR-001325

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CCIs

CCIs tied to check.

Number	Definition
CCI-000366	The organization implements the security configuration settings.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
CM-6	Configuration Settings