# infrastructure/kyverno/policies/disallow-privileged.yaml
# Prevents pods from running as privileged containers
# Security baseline: CIS Benchmark 5.2.1
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: disallow-privileged-containers
  annotations:
    policies.kyverno.io/title: Disallow Privileged Containers
    policies.kyverno.io/category: Pod Security Standards (Baseline)
    policies.kyverno.io/severity: high
    policies.kyverno.io/subject: Pod
    policies.kyverno.io/description: >-
      Privileged containers have all Linux capabilities and can access
      host resources. This policy prevents privileged containers from
      being created except in system namespaces.
spec:
  validationFailureAction: Enforce
  background: true
  rules:
    - name: privileged-containers
      match:
        any:
          - resources:
              kinds:
                - Pod
      exclude:
        any:
          - resources:
              namespaces:
                - kube-system
                - kyverno
                - istio-system
                - cert-manager
      validate:
        message: "Privileged containers are not allowed. Set securityContext.privileged to false."
        pattern:
          spec:
            containers:
              - securityContext:
                  privileged: "false"
            =(initContainers):
              - securityContext:
                  privileged: "false"
            =(ephemeralContainers):
              - securityContext:
                  privileged: "false"