---
controls:
id: 2
text: "Worker Node Security Configuration"
type: "node"
groups:
- id: 2.1
  text: "Kubelet"
  checks:
  - id: 2.1.1
    text: "Ensure that the --allow-privileged argument is set to false (Scored)"
    type: "skip"
    scored: true

  - id: 2.1.2
    text: "Ensure that the --anonymous-auth argument is set to false (Scored)"
    type: "skip"
    scored: true

  - id: 2.1.3
    text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Scored)"
    audit: "grep -A1 authorization-mode /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "authorization-mode"
        set: false
      - flag: "authorization-mode: Webhook"
        compare:
          op: has
          value: "Webhook"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and remove authorization-mode under
      kubeletArguments in /etc/origin/node/node-config.yaml or set it to "Webhook".
    scored: true

  - id: 2.1.4
    text: "Ensure that the --client-ca-file argument is set as appropriate (Scored)"
    audit: "grep -A1 client-ca-file /etc/origin/node/node-config.yaml"
    tests:
      test_items:
      - flag: "client-ca-file"
        set: false
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and remove any configuration returned by the following:
      grep -A1 client-ca-file /etc/origin/node/node-config.yaml

      Reset to the OpenShift default. 
      See https://github.com/openshift/openshift-ansible/blob/release-3.10/roles/openshift_node_group/templates/node-config.yaml.j2#L65
      The config file does not have this defined in kubeletArgument, but in PodManifestConfig.
    scored: true

  - id: 2.1.5
    text: "Ensure that the --read-only-port argument is set to 0 (Scored)"
    audit: "grep -A1 read-only-port /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "read-only-port"
        set: false
      - flag: "read-only-port: 0"
        compare:
          op: has
          value: "0"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and removed so that the OpenShift default is applied.
    scored: true

  - id: 2.1.6
    text: "Ensure that the --streaming-connection-idle-timeout argument is not set to 0 (Scored)"
    audit: "grep -A1 streaming-connection-idle-timeout /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "streaming-connection-idle-timeout"
        set: false
      - flag: "0"
        set: false
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and set the streaming-connection-timeout
      value like the following in node-config.yaml.
      
      kubeletArguments:
        streaming-connection-idle-timeout:
           - "5m"
    scored: true

  - id: 2.1.7
    text: "Ensure that the --protect-kernel-defaults argument is set to true (Scored)"
    type: "skip"
    scored: true

  - id: 2.1.8
    text: "Ensure that the --make-iptables-util-chains argument is set to true (Scored)"
    audit: "grep -A1 make-iptables-util-chains /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "make-iptables-util-chains"
        set: false
      - flag: "make-iptables-util-chains: true"
        compare:
          op: has
          value: "true"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and reset make-iptables-util-chains to the OpenShift
      default value of true. 
    scored: true

    id: 2.1.9
    text: "Ensure that the --keep-terminated-pod-volumeskeep-terminated-pod-volumes argument is set to false (Scored)"
    audit: "grep -A1 keep-terminated-pod-volumes /etc/origin/node/node-config.yaml"
    tests:
      test_items:
      - flag: "keep-terminated-pod-volumes: false"
        compare:
          op: has
          value: "false"
        set: true
    remediation: |
      Reset to the OpenShift defaults
    scored: true

  - id: 2.1.10
    text: "Ensure that the --hostname-override argument is not set (Scored)"
    type: "skip"
    scored: true

  - id: 2.1.11
    text: "Ensure that the --event-qps argument is set to 0 (Scored)"
    audit: "grep -A1 event-qps /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "event-qps"
        set: false
      - flag: "event-qps: 0"
        compare:
          op: has
          value: "0"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml set the event-qps argument to 0 in
      the kubeletArguments section of.
    scored: true

  - id: 2.1.12
    text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate (Scored)"
    audit: "grep -A1 cert-dir /etc/origin/node/node-config.yaml"
    tests:
      test_items:
      - flag: "/etc/origin/node/certificates"
        compare:
          op: has
          value: "/etc/origin/node/certificates"
        set: true
    remediation: |
      Reset to the OpenShift default values.
    scored: true

  - id: 2.1.13
    text: "Ensure that the --cadvisor-port argument is set to 0 (Scored)"
    audit: "grep -A1 cadvisor-port /etc/origin/node/node-config.yaml"
    tests:
      bin_op: or
      test_items:
      - flag: "cadvisor-port"
        set: false
      - flag: "cadvisor-port: 0"
        compare:
          op: has
          value: "0"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and remove the cadvisor-port flag 
      if it is set in the  kubeletArguments section.
    scored: true

  - id: 2.1.14
    text: "Ensure that the RotateKubeletClientCertificate argument is not set to false (Scored)"
    audit: "grep -B1 RotateKubeletClientCertificate=true /etc/origin/node/node-config.yaml"
    tests:
      test_items:
      - flag: "RotateKubeletClientCertificate=true"
        compare:
          op: has
          value: "true"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and set RotateKubeletClientCertificate to true.
    scored: true

  - id: 2.1.15
    text: "Ensure that the RotateKubeletServerCertificate argument is set to true (Scored)"
    audit: "grep -B1 RotateKubeletServerCertificate=true /etc/origin/node/node-config.yaml"
    test:
      test_items:
      - flag: "RotateKubeletServerCertificate=true"
        compare:
          op: has
          value: "true"
        set: true
    remediation: |
      Edit the Openshift node config file /etc/origin/node/node-config.yaml and set RotateKubeletServerCertificate to true.
    scored: true


- id: 2.2
  text: "Configuration Files"
  checks:
  - id: 2.2.1
    text: "Ensure that the kubelet.conf file permissions are set to 644 or more restrictive (Scored)"
    audit: "stat -c %a  /etc/origin/node/node.kubeconfig"
    tests:
      bin_op: or
      test_items:
        - flag: "644"
          compare:
            op: eq
            value: "644"
          set: true
        - flag: "640"
          compare:
            op: eq
            value: "640"
          set: true
        - flag: "600"
          compare:
            op: eq
            value: "600"
          set: true
    remediation: |
      Run the below command on each worker node.
      chmod 644 /etc/origin/node/node.kubeconfig
    scored: true

  - id: 2.2.2
    text: "Ensure that the kubelet.conf file ownership is set to root:root (Scored)"
    audit: "stat -c %U:%G /etc/origin/node/node.kubeconfig"
    tests:
      test_items:
        - flag: "root:root"
          compare:
            op: eq
            value: root:root
          set: true
      remediation: |
        Run the below command on each worker node.
        chown root:root /etc/origin/node/node.kubeconfig
      scored: true

  - id: 2.2.3
    text: "Ensure that the kubelet service file permissions are set to 644 or more restrictive (Scored)"
    audit: "stat -c %a /etc/systemd/system/atomic-openshift-node.service"
    tests:
      bin_op: or
      test_items:
        - flag: "644"
          compare:
            op: eq
            value: "644"
          set: true
        - flag: "640"
          compare:
            op: eq
            value: "640"
          set: true
        - flag: "600"
          compare:
            op: eq
            value: "600"
          set: true
    remediation: |
      Run the below command on each worker node.
      chmod 644 /etc/systemd/system/atomic-openshift-node.service
    scored: true

  - id: 2.2.4
    text: "Ensure that the kubelet service file ownership is set to root:root (Scored)"
    audit: "stat -c %U:%G /etc/systemd/system/atomic-openshift-node.service"
    tests:
      test_items:
        - flag: "root:root"
          compare:
            op: eq
            value: root:root
          set: true
      remediation: |
        Run the below command on each worker node.
        chown root:root /etc/systemd/system/atomic-openshift-node.service
      scored: true

  - id: 2.2.5
    text: "Ensure that the proxy kubeconfig file permissions are set to 644 or more restrictive (Scored)"
    audit: "stat -c %a /etc/origin/node/node.kubeconfig"
    tests:
      bin_op: or
      test_items:
        - flag: "644"
          compare:
            op: eq
            value: "644"
          set: true
        - flag: "640"
          compare:
            op: eq
            value: "640"
          set: true
        - flag: "600"
          compare:
            op: eq
            value: "600"
          set: true
    remediation: |
      Run the below command on each worker node.
      chmod 644 /etc/origin/node/node.kubeconfig
    scored: true

  - id: 2.2.6
    text: "Ensure that the proxy kubeconfig file ownership is set to root:root (Scored)"
    audit: "stat -c %U:%G /etc/origin/node/node.kubeconfig"
    tests:
      test_items:
        - flag: "root:root"
          compare:
            op: eq
            value: root:root
          set: true
      remediation: |
        Run the below command on each worker node.
        chown root:root /etc/origin/node/node.kubeconfig
      scored: true

  - id: 2.2.7
    text: "Ensure that the certificate authorities file permissions are set to 644 or more restrictive (Scored)"
    audit: "stat -c %a /etc/origin/node/client-ca.crt"
    tests:
      bin_op: or
      test_items:
        - flag: "644"
          compare:
            op: eq
            value: "644"
          set: true
        - flag: "640"
          compare:
            op: eq
            value: "640"
          set: true
        - flag: "600"
          compare:
            op: eq
            value: "600"
          set: true
    remediation: |
      Run the below command on each worker node.
      chmod 644 /etc/origin/node/client-ca.crt
    scored: true

  - id: 2.2.8
    text: "Ensure that the client certificate authorities file ownership is set to root:root (Scored)"
    audit: "stat -c %U:%G /etc/origin/node/client-ca.crt"
    tests:
      test_items:
        - flag: "root:root"
          compare:
            op: eq
            value: root:root
          set: true
      remediation: |
        Run the below command on each worker node.
        chown root:root /etc/origin/node/client-ca.crt
      scored: true