Shared Host Network Namespace

• Query id: 6b6bdfb3-c3ae-44cb-88e4-7405c1ba2c8a
• Query name: Shared Host Network Namespace
• Platform: Kubernetes
• Severity: Medium
• Category: Resource Management
• URL: Github

Description

Container should not share the host network namespace
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo
spec:
  hostNetwork: true
  securityContext:
    runAsUser: 1000
    runAsGroup: 3000
    fsGroup: 2000
  volumes:
    - name: sec-ctx-vol
      emptyDir: { }
  containers:
    - name: sec-ctx-demo
      image: busybox
      command: [ "sh", "-c", "sleep 1h" ]
      volumeMounts:
        - name: sec-ctx-vol
          mountPath: /data/demo
      securityContext:
        allowPrivilegeEscalation: false

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo
spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 3000
    fsGroup: 2000
  volumes:
    - name: sec-ctx-vol
      emptyDir: { }
  containers:
    - name: sec-ctx-demo
      image: busybox
      command: [ "sh", "-c", "sleep 1h" ]
      volumeMounts:
        - name: sec-ctx-vol
          mountPath: /data/demo
      securityContext:
        allowPrivilegeEscalation: false