restrict-role-wildcards.yaml

# Copyright 2024 Google LLC
#
# This is “Software” that is licensed under the “General Software” section of
# the Service Specific Terms (https://cloud.google.com/terms/service-terms) for
# usage in accordance with the following “Scope of Use”: This file may only be
# used on an Anthos cluster, including any associated ci/cd use. “Anthos
# cluster” is defined as “A Cluster (of any kind) registered to a fleet project
# where the Anthos API is enabled”.
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sProhibitRoleWildcardAccess
metadata:
  name: cis-gke-v1.5.0-restrict-role-wildcards
  labels:
    policycontroller.gke.io/bundleName: cis-gke-v1.5.0
  annotations:
    policycontroller.gke.io/bundleVersion: "202405.0"
    policycontroller.gke.io/constraintData: |-
      "{
        bundleName: 'cis-gke-v1.5.0',
        bundleDisplayName: 'CIS GKE Benchmark v1.5.0',
        bundleLink: 'https://cloud.google.com/anthos-config-management/docs/how-to/using-cis-gke-v1.5',
        bundleVersion: '202405.0',
        bundleDescription: 'Use the CIS GKE Benchmark 1.5.0 policy bundle with Policy Controller to evaluate the compliance of your cluster resources against the CIS GKE Benchmark v1.5.0, which is a set of recommendations for configuring GKE to support a robust security posture.',
        controlNumbers: '[4.1.3]',
        severity: 'UNSPECIFIED',
        description: 'Restricts the use of wildcards in `Roles` and `ClusterRoles`.',
        remediation: 'Cannot use the wildcard character in `Roles` and `ClusterRoles. Remove all wildcards from your `Roles` and `ClusterRoles`. See "RoleBinding and ClusterRoleBinding" for more information: https://kubernetes.io/docs/reference/access-authn-authz/rbac/#rolebinding-and-clusterrolebinding',
        minimumTemplateLibraryVersion: '1.12.0',
        constraintHash: '85ca11f53b0728ff32324b3a366ec2bed146fd2f0053497db1f76f9a8c1bc025'
      }"
spec:
  enforcementAction: dryrun
  match:
    excludedNamespaces:
      - gke-connect
      - resource-group-system
      - apigee
    kinds:
      - apiGroups:
          - rbac.authorization.k8s.io
        kinds:
          - ClusterRole
          - Role
  parameters:
    exemptions:
      clusterRoles:
        - name: config-management-operator
        - name: configsync.gke.io:ns-reconciler
        - name: configsync.gke.io:root-reconciler
        - name: cluster-admin
        - name: external-metrics-reader
        - name: gatekeeper-manager-role
        - name: ^istio-reader-clusterrole-asm-[0-9]{4}-[0-9]-istio-system$
          regexMatch: true
        - name: istio-reader-istio-system
        - name: ^istiod-clusterrole-asm-[0-9]{4}-[0-9]-istio-system$
          regexMatch: true
        - name: istiod-istio-system
        - name: istiod-gke-system
        - name: kubelet-api-admin
        - name: metering
        - name: resource-group-manager-role
        - name: servicemesh
        - name: anet-operator-cluster-role
        - name: cilium
        - name: cilium-operator
        - name: stackdriver-operator
        - name: system:controller:disruption-controller
        - name: system:controller:generic-garbage-collector
        - name: system:controller:horizontal-pod-autoscaler
        - name: system:controller:namespace-controller
        - name: system:controller:resourcequota-controller
        - name: system:gcp-controller-manager
        - name: system:gke-common-webhooks
        - name: system:gke-hpa-actor
        - name: system:gke-master-resourcequota
        - name: system:glbc-status
        - name: system:kube-controller-manager
        - name: system:kubestore-collector
        - name: system:kubelet-api-admin
        - name: system:managed-certificate-controller
        - name: lifecycle-controllers-deployer
        - name: metrics-server-operator
        - name: vmruntime-vmruntime-manager-role
        - name: capi-aggregated-manager-role
        - name: ^capi-manager-role-[0-9].[0-9]+.[0-9]+$
          regexMatch: true
        - name: istio-reader-clusterrole-managed
        - name: mdp-controller
        - name: system:cloud-controller-manager
        - name: cloudbuild
        - name: metadata-agent
        - name: system:gke-vpa-target-reader
        - name: policycontroller
        - name: apigee
        - name: apigee-init