policies/constraints/iam_deny_role.yaml

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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apiVersion: constraints.gatekeeper.sh/v1alpha1
kind: GCPIAMAllowedBindingsConstraintV3
metadata:
  name: deny_role
  annotations:
    description: Ban any users from being granted Service Account User access
    # This constraint is not certified by CIS.
    bundles.validator.forsetisecurity.org/cis-v1.1: 1.05
spec:
  severity: high
  match:
    target: # {"$ref":"#/definitions/io.k8s.cli.setters.target_fldr_trusted"}
    - "organizations/**"
    exclude: [] # optional, default is no exclusions
  parameters:
    mode: denylist
    assetType: cloudresourcemanager.googleapis.com/Project
    role: roles/iam.serviceAccountUser
    members:
    - "*"