Anonymous Auth Is Not Set To False

• Query id: 1de5cc51-f376-4638-a940-20f2e85ae238
• Query name: Anonymous Auth Is Not Set To False
• Platform: Kubernetes
• Severity: Medium
• Category: Access Control
• CWE: 1390
• URL: Github

Description

When using the kubelet or kube-apiserver command, the 'anonymous-auth' flag should be set to false (--anonymous-auth=false)
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", "--anonymous-auth=true"]
  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: ["--anonymous-auth=true"]
  restartPolicy: OnFailure

Positive test num. 3 - yaml file

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

Positive test num. 4 - yaml file

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

Positive test num. 5 - yaml file

apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
readOnlyPort: 0
authentication:
  anonymous:
    enabled: true

Positive test num. 6 - json file

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

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", "--anonymous-auth=false"]
  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"]
      args: ["--anonymous-auth=false"]
  restartPolicy: OnFailure

Negative test num. 3 - yaml file

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=false"]
  restartPolicy: OnFailure

Negative test num. 4 - yaml file

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

Negative test num. 5 - yaml file

apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
readOnlyPort: 0

Negative test num. 6 - json file

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