kube-bench/cfg/1.8/master.yaml

---
controls:
version: 1.8
id: 1
text: "Master Node Security Configuration"
type: "master"
groups:
- id: 1.1
  text: "API Server"
  checks:
  - id: 1.1.1
    text: "Ensure that the --anonymous-auth argument is set to false (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--anonymous-auth"
        compare:
          op: eq
          value: false
        set: true
    remediation: | 
      Edit the API server pod specification file $apiserverconf
      on the master node and set the below parameter.
      --anonymous-auth=false

    scored: true

  - id: 1.1.2
    text: "Ensure that the --basic-auth-file argument is not set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--basic-auth-file"
        set: false
    remediation: |
      Follow the documentation and configure alternate mechanisms for authentication. Then,
      edit the API server pod specification file $apiserverconf
      on the master node and remove the --basic-auth-file=<filename>
      parameter.      
    scored: true

  - id: 1.1.3
    text: "Ensure that the --insecure-allow-any-token argument is not set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag:  "--insecure-allow-any-token"
        set: false
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and remove the --insecure-allow-any-token
      parameter.      
    scored: true

  - id: 1.1.4
    text: "Ensure that the --kubelet-https argument is set to true (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests: 
      bin_op: or
      test_items:
      - flag: "--kubelet-https"
        compare:
          op: eq
          value: true
        set: true
      - flag: "--kubelet-https"
        set: false
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and remove the --kubelet-https parameter.      
    scored: true

  - id: 1.1.5
    text: "Ensure that the --insecure-bind-address argument is not set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--insecure-bind-address"
        set: false
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and remove the --insecure-bind-address
      parameter.      
    scored: true

  - id: 1.1.6
    text: "Ensure that the --insecure-port argument is set to 0 (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--insecure-port"
        compare:
          op: eq
          value: 0
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      apiserver.yaml on the master node and set the below parameter.
      --insecure-port=0      
    scored: true

  - id: 1.1.7
    text: "Ensure that the --secure-port argument is not set to 0 (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests: 
      bin_op: or
      test_items:
        - flag:  "--secure-port"
          compare:
            op: gt
            value: 0
          set: true
        - flag: "--secure-port"
          set: false
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and either remove the --secure-port parameter or
      set it to a different (non-zero) desired port.      
    scored: true

  - id: 1.1.8
    text: "Ensure that the --profiling argument is set to false (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--profiling"
        compare:
          op: eq
          value: false
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the below parameter.
      --profiling=false      
    scored: true

  - id: 1.1.9
    text: "Ensure that the --repair-malformed-updates argument is set to false (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--repair-malformed-updates"
        compare:
          op: eq
          value: false
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the below parameter.
      --repair-malformed-updates=false      
    scored: true

  - id: 1.1.10
    text: "Ensure that the admission control policy is not set to AlwaysAdmit (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: nothave
          value: AlwaysAdmit 
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to a
      value that does not include AlwaysAdmit.      
    scored: true

  - id: 1.1.11
    text: "Ensure that the admission control policy is set to AlwaysPullImages (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "AlwaysPullImages"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to
      include AlwaysPullImages.
      --admission-control=...,AlwaysPullImages,...      
    scored: true

  - id: 1.1.12
    text: "Ensure that the admission control policy is set to DenyEscalatingExec (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "DenyEscalatingExec"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to a
      value that includes DenyEscalatingExec.
      --admission-control=...,DenyEscalatingExec,...      
    scored: true

  - id: 1.1.13
    text: "Ensure that the admission control policy is set to SecurityContextDeny (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "SecurityContextDeny"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to
      include SecurityContextDeny.
      --admission-control=...,SecurityContextDeny,...      
    scored: true

  - id: 1.1.14
    text: "Ensure that the admission control policy is set to NamespaceLifecycle (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "admission-control"
        compare:
          op: has
          value: "NamespaceLifecycle"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to
      include NamespaceLifecycle.
      --admission-control=...,NamespaceLifecycle,...      
    scored: true

  - id: 1.1.15
    text: "Ensure that the --audit-log-path argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--audit-log-path"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --audit-log-path parameter to a suitable      
    path and file where you would like audit logs to be written, for example:
            --audit-log-path=/var/log/apiserver/audit.log
    scored: true

  - id: 1.1.16
    text: "Ensure that the --audit-log-maxage argument is set to 30 or as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--audit-log-maxage"
        compare:
          op: gte
          value: 30
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --audit-log-maxage parameter to 30 or      
    as an appropriate number of days:
            --audit-log-maxage=30
    scored: true

  - id: 1.1.17
    text: "Ensure that the --audit-log-maxbackup argument is set to 10 or as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--audit-log-maxbackup"
        compare:
          op: gte
          value: 10
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --audit-log-maxbackup parameter to 10
      or to an appropriate value.
      --audit-log-maxbackup=10      
    scored: true

  - id: 1.1.18
    text: "Ensure that the --audit-log-maxsize argument is set to 100 or as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--audit-log-maxsize"
        compare:
          op: gte
          value: 100
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --audit-log-maxsize parameter to an
      appropriate size in MB. For example, to set it as 100 MB:
      --audit-log-maxsize=100      
    scored: true

  - id: 1.1.19
    text: "Ensure that the --authorization-mode argument is not set to AlwaysAllow (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--authorization-mode"
        compare:
          op: nothave
          value: "AlwaysAllow"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --authorization-mode parameter to
      values other than AlwaysAllow. One such example could be as below.
      --authorization-mode=RBAC      
    scored: true

  - id: 1.1.20
    text: "Ensure that the --token-auth-file parameter is not set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--token-auth-file"
        set: false
    remediation: |
      Follow the documentation and configure alternate mechanisms for authentication. Then,
      edit the API server pod specification file $apiserverconf
      on the master node and remove the --token-auth-file=<filename>
      parameter.      
    scored: true

  - id: 1.1.21
    text: "Ensure that the --kubelet-certificate-authority argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--kubelet-certificate-authority"
        set: true
    remediation: |
      Follow the Kubernetes documentation and setup the TLS connection between the apiserver
      and kubelets. Then, edit the API server pod specification file
      $apiserverconf on the master node and set the --
      kubelet-certificate-authority parameter to the path to the cert file for the certificate
      authority.
      --kubelet-certificate-authority=<ca-string>      
    scored: true

  - id: 1.1.22
    text: "Ensure that the --kubelet-client-certificate and --kubelet-client-key arguments are
      set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      bin_op: and
      test_items:
      - flag: "--kubelet-client-certificate"
        set: true
      - flag: "--kubelet-client-key"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set up the TLS connection between the
      apiserver and kubelets. Then, edit API server pod specification file
      $apiserverconf on the master node and set the
      kubelet client certificate and key parameters as below.
      --kubelet-client-certificate=<path/to/client-certificate-file>
      --kubelet-client-key=<path/to/client-key-file>      
    scored: true

  - id: 1.1.23
    text: "Ensure that the --service-account-lookup argument is set to true (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--service-account-lookup"
        compare:
          op: eq
          value: true
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the below parameter.
      --service-account-lookup=true      
    scored: true

  - id: 1.1.24
    text: "Ensure that the admission control policy is set to PodSecurityPolicy (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "PodSecurityPolicy"
        set: true
    remediation: |
      Follow the documentation and create Pod Security Policy objects as per your environment.
      Then, edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to a
      value that includes PodSecurityPolicy :
      --admission-control=...,PodSecurityPolicy,...

      Then restart the API Server.      
    scored: true

  - id: 1.1.25
    text: "Ensure that the --service-account-key-file argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--service-account-key-file"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --service-account-key-file parameter
      to the public key file for service accounts:
      --service-account-key-file=<filename>      
    scored: true

  - id: 1.1.26
    text: "Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as 
      appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      bin_op: and
      test_items:
      - flag: "--etcd-certfile"
        set: true
      - flag: "--etcd-keyfile"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set up the TLS connection between the
      apiserver and etcd. Then, edit the API server pod specification file
      $apiserverconf on the master node and set the etcd
      certificate and key file parameters.
      --etcd-certfile=<path/to/client-certificate-file>
      --etcd-keyfile=<path/to/client-key-file>      
    scored: true

  - id: 1.1.27
    text: "Ensure that the admission control policy is set to ServiceAccount (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "ServiceAccount"
        set: true
    remediation: |
      Follow the documentation and create ServiceAccount objects as per your environment.
      Then, edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to a
      value that includes ServiceAccount.
      --admission-control=...,ServiceAccount,...      
    scored: true

  - id: 1.1.28
    text: "Ensure that the --tls-cert-file and --tls-private-key-file arguments are set
    as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      bin_op: and
      test_items:
      - flag: "--tls-cert-file"
        set: true
      - flag: "--tls-private-key-file"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
      Then, edit the API server pod specification file $apiserverconf
      on the master node and set the TLS certificate and private key file
      parameters.
      --tls-cert-file=<path/to/tls-certificate-file>
      --tls-private-key-file=<path/to/tls-key-file>      
    scored: true

  - id: 1.1.29
    text: "Ensure that the --client-ca-file argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--client-ca-file"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set up the TLS connection on the apiserver.
      Then, edit the API server pod specification file $apiserverconf
      on the master node and set the client certificate authority file.
      --client-ca-file=<path/to/client-ca-file>      
    scored: true

  - id: 1.1.30
    text: "Ensure that the --etcd-cafile argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--etcd-cafile"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set up the TLS connection between the
      apiserver and etcd. Then, edit the API server pod specification file
      $apiserverconf on the master node and set the etcd
      certificate authority file parameter.
      --etcd-cafile=<path/to/ca-file>      
    scored: true

  - id: 1.1.31
    text: "Ensure that the --authorization-mode argument is set to Node (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--authorization-mode"
        compare:
          op: has
          value: "Node"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --authorization-mode parameter to a
      value that includes Node.
      --authorization-mode=Node,RBAC      
    scored: true

  - id: 1.1.32
    text: "Ensure that the admission control policy is set to NodeRestriction (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "NodeRestriction"
        set: true
    remediation: |
      Follow the Kubernetes documentation and configure NodeRestriction plug-in on kubelets.
      Then, edit the API server pod specification file $apiserverconf
      on the master node and set the --admission-control parameter to a
      value that includes NodeRestriction.
      --admission-control=...,NodeRestriction,...      
    scored: true

  - id: 1.1.33
    text: "Ensure that the --experimental-encryption-provider-config argument is
    set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--experimental-encryption-provider-config"
        set: true
    remediation: |
      Follow the Kubernetes documentation and configure a EncryptionConfig file. Then, edit
      the API server pod specification file $apiserverconf
      on the master node and set the --experimental-encryption-provider-config parameter
      to the path of that file:
      --experimental-encryption-provider-config=</path/to/EncryptionConfig/File>      
    scored: true

  - id: 1.1.34
    text: "Ensure that the encryption provider is set to aescbc (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and configure a EncryptionConfig file. In this file,
      choose aescbc as the encryption provider.
      For example,
      kind: EncryptionConfig
      apiVersion: v1
      resources:
        - resources:
          - secrets
            providers:
            - aescbc:
                keys:
                - name: key1
                  secret: <32-byte base64-encoded secret>      
    scored: true

  - id: 1.1.35
    text: "Ensure that the admission control policy is set to EventRateLimit (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--admission-control"
        compare:
          op: has
          value: "EventRateLimit"
        set: true
    remediation: |
      Follow the Kubernetes documentation and set the desired limits in a configuration file.
      Then, edit the API server pod specification file $apiserverconf
      and set the below parameters.
      --admission-control=EventRateLimit
      --admission-control-config-file=<path/to/configuration/file>      
    scored: true

  - id: 1.1.36
    text: "Ensure that the AdvancedAuditing argument is not set to false (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and set the desired audit policy in the
      /etc/kubernetes/audit-policy.yaml file. Then, edit the API server pod specification file $apiserverconf
      and set the below parameters.
      --audit-policy-file=/etc/kubernetes/audit-policy.yaml      
    scored: true

  - id: 1.1.37
    text: "Ensure that the --request-timeout argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    type: "manual"
    remediation: |
      Edit the API server pod specification file $apiserverconf
      and set the below parameter as appropriate and if needed. For example,
      --request-timeout=300s      
    scored: true

- id: 1.2
  text: "Scheduler"
  checks:
  - id: 1.2.1
    text: "Ensure that the --profiling argument is set to false (Scored)"
    audit: "ps -ef | grep $schedulerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--profiling"
        compare:
          op: eq
          value: false
        set: true
    remediation: |
      Remediation:
        Edit the Scheduler pod specification file $schedulerconf
        file on the master node and set the below parameter.
        --profiling=false      
    scored: true

- id: 1.3
  text: "Controller Manager"
  checks:
  - id: 1.3.1
    text: "Ensure that the --terminated-pod-gc-threshold argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
        - flag: "--terminated-pod-gc-threshold"
          set: true
    remediation: |
      Edit the Controller Manager pod specification file $controllermanagerconf
      on the master node and set the --terminated-pod-gc-threshold to an appropriate threshold, for example:
      --terminated-pod-gc-threshold=10      
    scored: true

  - id: 1.3.2
    text: "Ensure that the --profiling argument is set to false (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--profiling"
        compare:
          op: eq
          value: false
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $apiserverconf
      on the master node and set the below parameter.
      --profiling=false      
    scored: true

  - id: 1.3.3
    text: "Ensure that the --use-service-account-credentials argument is set (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--use-service-account-credentials"
        compare:
          op: eq
          value: true
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $apiserverconf
      on the master node to set the below parameter.
      --use-service-account-credentials=true      
    scored: true

  - id: 1.3.4
    text: "Ensure that the --service-account-private-key-file argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--service-account-private-key-file"
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $apiserverconf
      on the master node and set the --service-account-private-
      key-file parameter to the private key file for service accounts.
      --service-account-private-key-file=<filename>      
    scored: true

  - id: 1.3.5
    text: "Ensure that the --root-ca-file argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--root-ca-file"
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $apiserverconf
      on the master node and set the --root-ca-file parameter to
      the certificate bundle file.
      --root-ca-file=<path/to/file>      
    scored: true

  - id: 1.3.6
    text: "Apply Security Context to Your Pods and Containers (Not Scored)"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and apply security contexts to your pods. For a
      suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
      Containers.      
    scored: false

  - id: 1.3.7
    text: " Ensure that the RotateKubeletServerCertificate argument is set to true (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "RotateKubeletServerCertificate"
        compare:
          op: eq
          value: true
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $apiserverconf
      controller-manager.yaml on the master node and set the --feature-gates parameter to
      include RotateKubeletServerCertificate=true.
      --feature-gates=RotateKubeletServerCertificate=true      
    scored: true

- id: 1.4
  text: "Configuration Files"
  checks:
  - id: 1.4.1
    text: "Ensure that the API server pod specification file permissions are
    set to 644 or more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $apiserverconf; then stat -c %a $apiserverconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $apiserverconf      
    scored: true

  - id: 1.4.2
    text: "Ensure that the API server pod specification file ownership is set to
    root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $apiserverconf; then stat -c %U:%G $apiserverconf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $apiserverconf      
    scored: true

  - id: 1.4.3
    text: "Ensure that the controller manager pod specification file
    permissions are set to 644 or more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %a $controllermanagerconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $controllermanagerconf      
    scored: true

  - id: 1.4.4
    text: "Ensure that the controller manager pod specification file
    ownership is set to root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %U:%G $controllermanagerconf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $controllermanagerconf      
    scored: true

  - id: 1.4.5
    text: "Ensure that the scheduler pod specification file permissions are set
    to 644 or more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c %a $schedulerconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $schedulerconf      
    scored: true

  - id: 1.4.6
    text: "Ensure that the scheduler pod specification file ownership is set to
    root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c %U:%G $schedulerconf; fi'"
    tests:
      test_items:
        - flag: "root:root"
          compare:
            op: eq
            value: "root:root"
          set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $schedulerconf      
    scored: true

  - id: 1.4.7
    text: "Ensure that the etcd pod specification file permissions are set to
    644 or more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $etcdconf; then stat -c %a $etcdconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $etcdconf      
    scored: true

  - id: 1.4.8
    text: "Ensure that the etcd pod specification file ownership is set to
    root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $etcdconf; then stat -c %U:%G $etcdconf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $etcdconf      
    scored: true

  - id: 1.4.9
    text: "Ensure that the Container Network Interface file permissions are
    set to 644 or more restrictive (Not Scored)"
    audit: "stat -c %a <path/to/cni/files>"
    type: manual
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chmod 644 <path/to/cni/files>      
    scored: true

  - id: 1.4.10
    text: "Ensure that the Container Network Interface file ownership is set
    to root:root (Not Scored)"
    audit: "stat -c %U:%G <path/to/cni/files>"
    type: manual
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root <path/to/cni/files>      
    scored: true

  - id: 1.4.11
    text: "Ensure that the etcd data directory permissions are set to 700 or more restrictive (Scored)"
    audit: ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%' | xargs stat -c %a
    tests:
      test_items:
      - flag: "700"
        compare:
          op: eq
          value: "700"
        set: true
    remediation: |
      On the etcd server node, get the etcd data directory, passed as an argument --data-dir ,
      from the below command:
      ps -ef | grep $etcdbin
      Run the below command (based on the etcd data directory found above). For example,
      chmod 700 /var/lib/etcd      
    scored: true

  - id: 1.4.12
    text: "Ensure that the etcd data directory ownership is set to etcd:etcd (Scored)"
    audit: ps -ef | grep $etcdbin | grep -- --data-dir | sed 's%.*data-dir[= ]\([^ ]*\).*%\1%' | xargs stat -c %U:%G
    tests:
      test_items:
      - flag: "etcd:etcd"
        set: true
    remediation: |
      On the etcd server node, get the etcd data directory, passed as an argument --data-dir ,
      from the below command:
      ps -ef | grep $etcdbin
      Run the below command (based on the etcd data directory found above). For example,
      chown etcd:etcd /var/lib/etcd      
    scored: true

  - id: 1.4.13
    text: "Ensure that the admin.conf file permissions are set to 644 or
    more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c %a /etc/kubernetes/admin.conf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 /etc/kubernetes/admin.conf      
    scored: true

  - id: 1.4.14
    text: "Ensure that the admin.conf file ownership is set to root:root (Scored)"
    audit: "/bin/sh -c 'if test -e /etc/kubernetes/admin.conf; then stat -c %U:%G /etc/kubernetes/admin.conf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root /etc/kubernetes/admin.conf      
    scored: true

  - id: 1.4.15
    text: "Ensure that the scheduler.conf file permissions are set to 644 or
    more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c %a $schedulerconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $schedulerconf      
    scored: true

  - id: 1.4.16
    text: "Ensure that the scheduler.conf file ownership is set to root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $schedulerconf; then stat -c %U:%G $schedulerconf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $schedulerconf      
    scored: true

  - id: 1.4.17
    text: "Ensure that the controller-manager.conf file permissions are set
    to 644 or more restrictive (Scored)"
    audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %a $controllermanagerconf; fi'"
    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 (based on the file location on your system) on the master node.
      For example,
      chmod 644 $controllermanagerconf      
    scored: true

  - id: 1.4.18
    text: "Ensure that the controller-manager.conf file ownership is set to root:root (Scored)"
    audit: "/bin/sh -c 'if test -e $controllermanagerconf; then stat -c %U:%G $controllermanagerconf; fi'"
    tests:
      test_items:
      - flag: "root:root"
        compare:
          op: eq
          value: "root:root"
        set: true
    remediation: |
      Run the below command (based on the file location on your system) on the master node.
      For example,
      chown root:root $controllermanagerconf      
    scored: true

- id: 1.5
  text: "etcd"
  checks:
  - id: 1.5.1
    text: "Ensure that the --cert-file and --key-file arguments are set as appropriate (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--cert-file"
        set: true
      - flag:  "--key-file"
        set: true
    remediation: |
      Follow the etcd service documentation and configure TLS encryption.
      Then, edit the etcd pod specification file $etcdconf on the
      master node and set the below parameters.
      --ca-file=</path/to/ca-file>
      --key-file=</path/to/key-file>      
    scored: true

  - id: 1.5.2
    text: "Ensure that the --client-cert-auth argument is set to true (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--client-cert-auth"
        compare:
          op: eq
          value: true
        set: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and set the below parameter.
      --client-cert-auth="true"      
    scored: true

  - id: 1.5.3
    text: "Ensure that the --auto-tls argument is not set to true (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      bin_op: or
      test_items:
      - flag: "--auto-tls"
        set: false
      - flag: "--auto-tls"
        compare:
          op: neq
          value: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and either remove the --auto-tls parameter or set it to false.
        --auto-tls=false      
    scored: true

  - id: 1.5.4
    text: "Ensure that the --peer-cert-file and --peer-key-file arguments are set
    as appropriate (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--peer-cert-file"
        set: true
      - flag: "--peer-key-file"
        set: true
    remediation: |
      Follow the etcd service documentation and configure peer TLS encryption as appropriate
      for your etcd cluster. Then, edit the etcd pod specification file $etcdconf on the
      master node and set the below parameters.
      --peer-client-file=</path/to/peer-cert-file>
      --peer-key-file=</path/to/peer-key-file>      
    scored: true

  - id: 1.5.5
    text: "Ensure that the --peer-client-cert-auth argument is set to true (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--peer-client-cert-auth"
        compare:
          op: eq
          value: true
        set: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and set the below parameter.
      --peer-client-cert-auth=true      
    scored: true

  - id: 1.5.6
    text: "Ensure that the --peer-auto-tls argument is not set to true (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      bin_op: or
      test_items:
      - flag: "--peer-auto-tls"
        set: false
      - flag: "--peer-auto-tls"
        compare:
          op: eq
          value: false
        set: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and either remove the --peer-auto-tls parameter or set it to false.
      --peer-auto-tls=false      
    scored: true

  - id: 1.5.7
    text: "Ensure that the --wal-dir argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--wal-dir"
        set: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and set the below parameter.
      --wal-dir=</path/to/log/dir>      
    scored: true

  - id: 1.5.8
    text: "Ensure that the --max-wals argument is set to 0 (Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--max-wals"
        compare:
          op: eq
          value: 0
        set: true
    remediation: |
      Edit the etcd pod specification file $etcdconf on the master
      node and set the below parameter.
      --max-wals=0      
    scored: true

  - id: 1.5.9
    text: "Ensure that a unique Certificate Authority is used for etcd (Not Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    tests:
      test_items:
      - flag: "--trusted-ca-file"
        set: true
    remediation: |
      Follow the etcd documentation and create a dedicated certificate authority setup for the
      etcd service.
      Then, edit the etcd pod specification file $etcdconf on the
      master node and set the below parameter.
      --trusted-ca-file=</path/to/ca-file>      
    scored: false 

- id: 1.6
  text: "General Security Primitives"
  checks:
  - id: 1.6.1
    text: "Ensure that the cluster-admin role is only used where required (Not Scored)"
    type: "manual"
    remediation: |
      Remove any unneeded clusterrolebindings :
      kubectl delete clusterrolebinding [name]      
    scored: false

  - id: 1.6.2
    text: "Create Pod Security Policies for your cluster (Not Scored)"
    type: "manual"
    remediation: |
      Follow the documentation and create and enforce Pod Security Policies for your cluster.
      Additionally, you could refer the "CIS Security Benchmark for Docker" and follow the
      suggested Pod Security Policies for your environment.      
    scored: false

  - id: 1.6.3
    text: "Create administrative boundaries between resources using namespaces (Not Scored)"
    type: "manual"
    remediation: |
      Follow the documentation and create namespaces for objects in your deployment as you
      need them.      
    scored: false

  - id: 1.6.4
    text: "Create network segmentation using Network Policies (Not Scored)"
    type: "manual"
    remediation: |
      Follow the documentation and create NetworkPolicy objects as you need them.      
    scored: false

  - id: 1.6.5
    text: "Ensure that the seccomp profile is set to docker/default in your pod 
    definitions (Not Scored)"
    type: "manual"
    remediation: |
      Seccomp is an alpha feature currently. By default, all alpha features are disabled. So, you
      would need to enable alpha features in the apiserver by passing "--feature-
      gates=AllAlpha=true" argument.
      Edit the $apiserverconf file on the master node and set the KUBE_API_ARGS
      parameter to "--feature-gates=AllAlpha=true"
      KUBE_API_ARGS="--feature-gates=AllAlpha=true"
      Based on your system, restart the kube-apiserver service. For example:
      systemctl restart kube-apiserver.service
      Use annotations to enable the docker/default seccomp profile in your pod definitions. An
      example is as below:
      apiVersion: v1
      kind: Pod
      metadata:
        name: trustworthy-pod
        annotations:
          seccomp.security.alpha.kubernetes.io/pod: docker/default
      spec:
        containers:
          - name: trustworthy-container
            image: sotrustworthy:latest      
    scored: false

  - id: 1.6.6
    text: "Apply Security Context to Your Pods and Containers (Not Scored)"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and apply security contexts to your pods. For a
      suggested list of security contexts, you may refer to the CIS Security Benchmark for Docker
      Containers.      
    scored: false

  - id: 1.6.7
    text: "Configure Image Provenance using ImagePolicyWebhook admission controller (Not Scored)"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and setup image provenance.      
    scored: false

  - id: 1.6.8
    text: "Configure Network policies as appropriate (Not Scored)"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and setup network policies as appropriate.
      For example, you could create a "default" isolation policy for a Namespace by creating a
      NetworkPolicy that selects all pods but does not allow any traffic:
      apiVersion: networking.k8s.io/v1
      kind: NetworkPolicy
      metadata:
        name: default-deny
      spec:
        podSelector:      
    scored: false

  - id: 1.6.9
    text: "Place compensating controls in the form of PSP and RBAC for
    privileged containers usage (Not Scored)"
    type: "manual"
    remediation: |
      Follow Kubernetes documentation and setup PSP and RBAC authorization for your cluster.      
    scored: false