etcd client certificate authentication set to false

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Metadata

Id: 9391103a-d8d7-4671-ac5d-606ba7ccb0ac

Cloud Provider: Kubernetes

Platform: Kubernetes

Severity: Medium

Category: Secret Management

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Description

When containers run etcd, the --client-cert-auth flag must be set to true. This enforces client certificate authentication to prevent unauthenticated access to the etcd server. The rule reports IncorrectValue when the flag is explicitly set to false, and MissingAttribute when the flag is not defined.

Compliant Code Examples

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-etcd-deployment
spec:
  selector:
    matchLabels:
      app: app
  replicas: 1
  template:
    metadata:
      labels:
        app: app
        version: v1
    spec:
      serviceAccountName: database
      containers:
      - name: database
        image: gcr.io/google_containers/etcd:v3.2.18
        imagePullPolicy: IfNotPresent
        command: ["etcd"]
        args: ["--client-cert-auth=true"]
      nodeSelector:
        kubernetes.io/hostname: worker02  
    restartPolicy: OnFailure

Non-Compliant Code Examples

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-etcd-deployment
spec:
  selector:
    matchLabels:
      app: app
  replicas: 1
  template:
    metadata:
      labels:
        app: app
        version: v1
    spec:
      serviceAccountName: database
      containers:
      - name: database
        image: gcr.io/google_containers/etcd:v3.2.18
        imagePullPolicy: IfNotPresent
        command: ["etcd"]
        args: []
      nodeSelector:
        kubernetes.io/hostname: worker02  
    restartPolicy: OnFailure

apiVersion: apps/v1
kind: Deployment
metadata:
  name: app-etcd-deployment
spec:
  selector:
    matchLabels:
      app: app
  replicas: 1
  template:
    metadata:
      labels:
        app: app
        version: v1
    spec:
      serviceAccountName: database
      containers:
      - name: database
        image: gcr.io/google_containers/etcd:v3.2.18
        imagePullPolicy: IfNotPresent
        command: ["etcd"]
        args: ["--client-cert-auth=false"]
      nodeSelector:
        kubernetes.io/hostname: worker02  
    restartPolicy: OnFailure