M-104_host_path_volumes.yml

# Copyright 2023 Undistro Authors
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# https://kubernetes.io/docs/concepts/security/pod-security-standards/#baseline
# https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/pod-security-admission/policy/check_hostPathVolumes.go
# https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/pod-security-admission/policy/check_hostPathVolumes_test.go
id: M-104
slug: host-path-volumes
severity: High
message: "HostPath volume"
match:
  resources:
    - group: ""
      version: v1
      resource: pods
    - group: apps
      version: v1
      resource: deployments
    - group: apps
      version: v1
      resource: daemonsets
    - group: apps
      version: v1
      resource: statefulsets
    - group: apps
      version: v1
      resource: replicasets
    - group: batch
      version: v1
      resource: cronjobs
    - group: batch
      version: v1
      resource: jobs
validations:
  - expression: >
      podSpec.?volumes.orValue([]).all(v, !has(v.hostPath))
    message: "Pod with mounted host volume"