Container running as root

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Metadata

Id: cf34805e-3872-4c08-bf92-6ff7bb0cfadb

Cloud Provider: k8s

Framework: Kubernetes

Severity: Medium

Category: Best Practices

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Description

Containers should run only as a non-root user. This limits the exploitability of security misconfigurations and restricts an attacker’s options in case of compromise.

Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo-2
spec:
  securityContext:
    runAsUser: 10000
    runAsNonRoot: true
  containers:
  - name: sec-ctx-demo-2
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 10100
      allowPrivilegeEscalation: false
      runAsNonRoot: true
      

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo-1
spec:
  securityContext:
    runAsUser: 1000
    runAsNonRoot: true
  containers:
  - name: sec-ctx-demo-100
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 1000
      runAsNonRoot: false
  - name: sec-ctx-demo-200
    image: gcr.io/google-samples/node-hedwfwllo:1.0
    securityContext:
      runAsUser: 2000
      runAsNonRoot: true
      

apiVersion: v1
kind: Pod
metadata:
  name: containers-runs-as-root
spec:
  securityContext:
    runAsUser: 0
    runAsNonRoot: false
  containers:
  - name: sec-ctx-demo-100
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 1000
      runAsNonRoot: false

Non-Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo-2
spec:
  securityContext:
    runAsUser: 10
    runAsNonRoot: false
  containers:
  - name: sec-ctx-demo-100
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 0
      runAsNonRoot: false
  - name: sec-ctx-demo-200
    image: gcr.io/google-samples/node-hedwfwllo:1.0
    securityContext:
      runAsUser: 0
      runAsNonRoot: false
      

apiVersion: v1
kind: Pod
metadata:
  name: containers-runs-as-root
spec:
  securityContext:
    runAsUser: 0
    runAsNonRoot: false
  containers:
  - name: sec-ctx-demo-100
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 0
      runAsNonRoot: false
      
      

apiVersion: v1
kind: Pod
metadata:
  name: security-context-demo-2
spec:
  containers:
  - name: sec-ctx-demo-1
    image: gcr.io/google-samples/node-hello:1.0
  - name: sec-ctx-demo-2
    image: gcr.io/google-samples/node-hello:1.0
    securityContext:
      runAsUser: 0
      allowPrivilegeEscalation: false
      runAsNonRoot: false