cyberstrikeus 1.2.6 Ensure that the --authorization-mode argument is not set to AlwaysAllow (Automated)
Profile Applicability
- Level 1 - Master Node
Description
Do not always authorize all requests.
Rationale
The API Server, can be configured to allow all requests. This mode should not be used on any production cluster.
Impact
Only authorized requests will be served.
Audit
Run the following command on the Control Plane node:
ps -ef | grep kube-apiserver
Verify that the --authorization-mode argument exists and is not set to AlwaysAllow.
Remediation
Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the --authorization-mode parameter to values other than AlwaysAllow. One such example could be as below.
--authorization-mode=RBAC
Default Value
By default, AlwaysAllow is not enabled.
References
- https://kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/
- https://kubernetes.io/docs/admin/authorization/
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists | x | x | x |
| v7 | 9.2 Ensure Only Approved Ports, Protocols and Services Are Running | x | x |