Authorization Mode RBAC Not Set

Query id: 1aa4a1ae-5dbb-48a1-9aa2-630ea4be208e
Query name: Authorization Mode RBAC Not Set
Platform: Kubernetes
Severity: Medium
Category: Access Control
CWE: 285
URL: Github

Description¶

When using kube-apiserver command, the 'authorization-mode' flag should have 'RBAC' mode
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Positive test num. 1 - yaml file

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: ["--authorization-mode=AlwaysAllow"]
  restartPolicy: OnFailure

Positive test num. 2 - yaml file

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: ["--authorization-mode=Node"]
  restartPolicy: OnFailure

Code samples without security vulnerabilities¶

Negative test num. 1 - yaml file

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: ["--authorization-mode=RBAC,Node"]
  restartPolicy: OnFailure

Negative test num. 2 - yaml file

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","--authorization-mode=RBAC,Node"]
      args: []
  restartPolicy: OnFailure