cis-k8s-v1110-1.1.1

DevOps & Security

Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated)

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1.1.1 Ensure that the API server pod specification file permissions are set to 600 or more restrictive (Automated)

Profile Applicability

Level 1 - Master Node

Description

Ensure that the API server pod specification file has permissions of 600 or more restrictive.

Rationale

The API server pod specification file controls various parameters that set the behavior of the API server. 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

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

stat -c %a /etc/kubernetes/manifests/kube-apiserver.yaml

Verify that the permissions are 600 or more restrictive.

Remediation

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

chmod 600 /etc/kubernetes/manifests/kube-apiserver.yaml

Default Value

By default, the kube-apiserver.yaml file has permissions of 640.

References

https://kubernetes.io/docs/admin/kube-apiserver/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists - Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications.	*	*	*
v7	14.6 Protect Information through Access Control Lists - Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities.	*	*	*