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Ensure that the --anonymous-auth argument is set to false (Manual)
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Showing SKILL.md
| name | cis-k8s-v1111-1.2.1 |
| description | Ensure that the --anonymous-auth argument is set to false (Manual) |
| category | cis-k8s |
| version | 1.11.1 |
| author | cyberstrike-official |
| tags | ["cis","kubernetes","control-plane","api-server","authentication","anonymous-auth"] |
| cis_id | 1.2.1 |
| cis_benchmark | CIS Kubernetes Benchmark v1.11.1 |
| tech_stack | ["kubernetes"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Disable anonymous requests to the API server.
When enabled, requests that are not rejected by other configured authentication methods are treated as anonymous requests. These requests are then served by the API server. You should rely on authentication to authorize access and disallow anonymous requests.
If you are using RBAC authorization, it is generally considered reasonable to allow anonymous access to the API Server for health checks and discovery purposes, and hence this recommendation is not scored. However, you should consider whether anonymous discovery is an acceptable risk for your purposes.
Anonymous requests will be rejected.
Run the following command on the Control Plane node:
ps -ef | grep kube-apiserver
Verify that the --anonymous-auth argument is set to false.
Alternative Audit:
kubectl get pod -nkube-system -lcomponent=kube-apiserver -o=jsonpath='{range .items[*]}{.spec.containers[*].command} {"\n"}{end}' | grep '\--anonymous-auth' | grep -i false
If the exit code is '1', then the control isn't present / failed.
Edit the API server pod specification file /etc/kubernetes/manifests/kube-apiserver.yaml on the Control Plane node and set the below parameter.
--anonymous-auth=false
By default, anonymous access is enabled.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists | x | x | x |
| v7 |
| 14.6 Protect Information through Access Control Lists |
| x |
| x |
| x |