kube-bench/cfg/rh-0.7/node.yaml

---
controls:
version: "rh-0.7"
id: 2
text: "Worker Node Security Configuration"
type: "node"
groups:
  - id: 7
    text: "Kubelet"
    checks:
      - id: 7.1
        text: "Use Security Context Constraints to manage privileged containers as needed"
        type: "skip"
        scored: true

      - id: 7.2
        text: "Ensure anonymous-auth is not disabled"
        type: "skip"
        scored: true

      - id: 7.3
        text: "Verify that the --authorization-mode argument is set to WebHook"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.authorization-mode}"
              set: false
            - path: "{.kubeletArguments.authorization-mode}"
              compare:
                op: has
                value: "Webhook"
        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: 7.4
        text: "Verify the OpenShift default for the client-ca-file argument"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          test_items:
            - path: "{.PodManifestConfig.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: 7.5
        text: "Verify the OpenShift default setting for the read-only-port argument"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.read-only-port}"
              set: false
            - path: "{.kubeletArguments.read-only-port}"
              compare:
                op: eq
                value: "0"
        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: 7.6
        text: "Adjust the streaming-connection-idle-timeout argument"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.streaming-connection-idle-timeout}"
              set: false
            - path: "{.kubeletArguments.streaming-connection-idle-timeout}"
              compare:
                op: eq
                value: "5m"
        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: 7.7
        text: "Verify the OpenShift defaults for the protect-kernel-defaults argument"
        type: "skip"
        scored: true

      - id: 7.8
        text: "Verify the OpenShift default value of true for the make-iptables-util-chains argument"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.make-iptables-util-chains}"
              set: false
            - path: "{.kubeletArguments.make-iptables-util-chains}"
              compare:
                op: eq
                value: "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: 7.9
        text: "Verify that the --keep-terminated-pod-volumes argument is set to false"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.keep-terminated-pod-volumes}"
              set: false
            - path: "{.kubeletArguments.keep-terminated-pod-volumes}"
              compare:
                op: eq
                value: "false"
        remediation: |
          Reset to the OpenShift defaults          
        scored: true

      - id: 7.10
        text: "Verify the OpenShift defaults for the hostname-override argument"
        type: "skip"
        scored: true

      - id: 7.11
        text: "Set the --event-qps argument to 0"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.event-qps}"
              set: false
            - path: "{.kubeletArguments.event-qps}"
              compare:
                op: eq
                value: "0"
        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: 7.12
        text: "Verify the OpenShift cert-dir flag for HTTPS traffic"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          test_items:
            - path: "{.kubeletArguments.cert-dir}"
              compare:
                op: has
                value: "/etc/origin/node/certificates"
        remediation: |
          Reset to the OpenShift default values.          
        scored: true

      - id: 7.13
        text: "Verify the OpenShift default of 0 for the cadvisor-port argument"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          bin_op: or
          test_items:
            - path: "{.kubeletArguments.cadvisor-port}"
              set: false
            - path: "{.kubeletArguments.cadvisor-port}"
              compare:
                op: eq
                value: "0"
        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: 7.14
        text: "Verify that the RotateKubeletClientCertificate argument is set to true"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          test_items:
            - path: "{.kubeletArguments.feature-gates}"
              compare:
                op: has
                value: "RotateKubeletClientCertificate=true"
        remediation: |
          Edit the Openshift node config file /etc/origin/node/node-config.yaml and set RotateKubeletClientCertificate to true.          
        scored: true

      - id: 7.15
        text: "Verify that the RotateKubeletServerCertificate argument is set to true"
        audit_config: "cat /etc/origin/node/node-config.yaml"
        tests:
          test_items:
            - path: "{.kubeletArguments.feature-gates}"
              compare:
                op: has
                value: "RotateKubeletServerCertificate=true"
        remediation: |
          Edit the Openshift node config file /etc/origin/node/node-config.yaml and set RotateKubeletServerCertificate to true.          
        scored: true


  - id: 8
    text: "Configuration Files"
    checks:
      - id: 8.1
        text: "Verify the OpenShift default permissions for the kubelet.conf file"
        audit: "stat -c permissions=%a  /etc/origin/node/node.kubeconfig"
        tests:
          test_items:
            - flag: "permissions"
              compare:
                op: bitmask
                value: "644"
        remediation: |
          Run the below command on each worker node.
          chmod 644 /etc/origin/node/node.kubeconfig          
        scored: true

      - id: 8.2
        text: "Verify the kubeconfig file ownership of root:root"
        audit: "stat -c %U:%G /etc/origin/node/node.kubeconfig"
        tests:
          test_items:
            - flag: "root:root"
          remediation: |
            Run the below command on each worker node.
            chown root:root /etc/origin/node/node.kubeconfig            
          scored: true

      - id: 8.3
        text: "Verify the kubelet service file permissions of 644"
        audit: "stat -c permissions=%a $kubeletsvc"
        tests:
          test_items:
            - flag: "permissions"
              compare:
                op: bitmask
                value: "644"
        remediation: |
          Run the below command on each worker node.
          chmod 644 $kubeletsvc          
        scored: true

      - id: 8.4
        text: "Verify the kubelet service file ownership of root:root"
        audit: "stat -c %U:%G $kubeletsvc"
        tests:
          test_items:
            - flag: "root:root"
          remediation: |
            Run the below command on each worker node.
            chown root:root $kubeletsvc            
          scored: true

      - id: 8.5
        text: "Verify the OpenShift default permissions for the proxy kubeconfig file"
        audit: "stat -c permissions=%a /etc/origin/node/node.kubeconfig"
        tests:
          test_items:
            - flag: "permissions"
              compare:
                op: bitmask
                value: "644"
        remediation: |
          Run the below command on each worker node.
          chmod 644 /etc/origin/node/node.kubeconfig          
        scored: true

      - id: 8.6
        text: "Verify the proxy kubeconfig file ownership of root:root"
        audit: "stat -c %U:%G /etc/origin/node/node.kubeconfig"
        tests:
          test_items:
            - flag: "root:root"
          remediation: |
            Run the below command on each worker node.
            chown root:root /etc/origin/node/node.kubeconfig            
          scored: true

      - id: 8.7
        text: "Verify the OpenShift default permissions for the certificate authorities file."
        audit: "stat -c permissions=%a /etc/origin/node/client-ca.crt"
        tests:
          test_items:
            - flag: "permissions"
              compare:
                op: bitmask
                value: "644"
        remediation: |
          Run the below command on each worker node.
          chmod 644 /etc/origin/node/client-ca.crt          
        scored: true

      - id: 8.8
        text: "Verify the client certificate authorities file ownership of root:root"
        audit: "stat -c %U:%G /etc/origin/node/client-ca.crt"
        tests:
          test_items:
            - flag: "root:root"
          remediation: |
            Run the below command on each worker node.
            chown root:root /etc/origin/node/client-ca.crt            
          scored: true