Anonymous auth is not set to false

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Metadata

Id: 1de5cc51-f376-4638-a940-20f2e85ae238

Cloud Provider: Kubernetes

Platform: Kubernetes

Severity: Medium

Category: Access Control

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Description

When kubelet or kube-apiserver are used, the --anonymous-auth flag should be set to false.
The rule checks container command entries for those components and the KubeletConfiguration.authentication.anonymous.enabled attribute.
An IncorrectValue issue is reported when --anonymous-auth is set to true or authentication.anonymous.enabled is not false.

Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
      command: ["kube-apiserver", "--anonymous-auth=false"]
  restartPolicy: OnFailure

{
    "kind": "KubeletConfiguration",
    "apiVersion": "kubelet.config.k8s.io/v1beta1",
    "address": "0.0.0.0",
    "authentication": {
      "anonymous": {
        "enabled": false
      }
    }
}

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: foo/bar
      command: ["kubelet", "--anonymous-auth=false"]
  restartPolicy: OnFailure

Non-Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
      command: ["kube-apiserver"]
      args: ["--anonymous-auth=true"]
  restartPolicy: OnFailure

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: foo/bar
      command: ["kubelet", "--anonymous-auth=true"]
  restartPolicy: OnFailure

apiVersion: v1
kind: Pod
metadata:
  name: command-demo
  labels:
    purpose: demonstrate-command
spec:
  containers:
    - name: command-demo-container
      image: foo/bar
      command: ["kubelet"]
      args: ["--anonymous-auth=true"]
  restartPolicy: OnFailure