Privilege escalation allowed

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Metadata

Id: 5572cc5e-1e4c-4113-92a6-7a8a3bd25e6d

Cloud Provider: Kubernetes

Platform: Kubernetes

Severity: High

Category: Insecure Configurations

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Description

Containers should not run with the allowPrivilegeEscalation attribute set to true. The attribute must be present and set to false to prevent a container from gaining more privileges than its parent process. This rule applies to both containers and initContainers and reports missing attributes or values set to true.

Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: pod1
spec:
  containers:
  - name: app
    image: images.my-company.example/app:v4
    securityContext:
      allowPrivilegeEscalation: false
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"

  - name: log-aggregator
    image: images.my-company.example/log-aggregator:v6
    securityContext:
      allowPrivilegeEscalation: false
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"

Non-Compliant Code Examples

apiVersion: v1
kind: Pod
metadata:
  name: example-priv
spec:
  containers:
      - name: payment
        image: nginx
        securityContext:
          capabilities:
          drop:
            - SYS_ADMIN
      - name: payment2
        image: nginx
      - name: payment4
        image: nginx
        securityContext:
          capabilities:
            add:
              - NET_BIND_SERVICE
      - name: payment3
        image: nginx
        securityContext:
          allowPrivilegeEscalation: false

apiVersion: v1
kind: Pod
metadata:
  name: pod2
spec:
  containers:
  - name: app
    image: images.my-company.example/app:v4
    securityContext:
      allowPrivilegeEscalation: true
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"

  - name: log-aggregator
    image: images.my-company.example/log-aggregator:v6
    securityContext:
      runAsUser: 2000
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "128Mi"
        cpu: "500m"