kube-bench/cfg/1.11/master.yaml

---
controls:
version: 1.11
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 plugin AlwaysAdmit is not set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--enable-admission-plugins"
        compare:
          op: nothave
          value: AlwaysAdmit
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --enable-admission-plugins parameter to a
      value that does not include AlwaysAdmit.      
    scored: true

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

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

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

  - id: 1.1.14
    text: "Ensure that the admission control plugin NamespaceLifecycle is set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--disable-admission-plugins"
        compare:
          op: nothave
          value: "NamespaceLifecycle"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the --disable-admission-plugins parameter to
      ensure it does not include NamespaceLifecycle.
      --disable-admission-plugins=...,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 plugin PodSecurityPolicy is set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--enable-admission-plugins"
        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 --enable-admission-plugins parameter to a
      value that includes PodSecurityPolicy :
      --enable-admission-plugins=...,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 plugin ServiceAccount is set(Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--enable-admission-plugins"
        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 --enable-admission-plugins parameter to a
      value that includes ServiceAccount.
      --enable-admission-plugins=...,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 API Server only makes use of Strong Cryptographic Ciphers (Not Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--tls-cipher-suites"
        compare:
          op: has
          value: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256"
        set: true
    remediation: |
      Edit the API server pod specification file $apiserverconf
      on the master node and set the below parameter.
      --tls-cipher- suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM _SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM _SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM _SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256      
    scored: false

  - id: 1.1.31
    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: 1.1.32
    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: 1.1.33
    text: "Ensure that the admission control plugin NodeRestriction is set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--enable-admission-plugins"
        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 --enable-admission-plugins parameter to a
      value that includes NodeRestriction.
      --enable-admission-plugins=...,NodeRestriction,...      
    scored: true

  - id: 1.1.34
    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: 1.1.35
    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: 1.1.36
    text: "Ensure that the admission control plugin EventRateLimit is set (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--enable-admission-plugins"
        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.
      --enable-admission-plugins=...,EventRateLimit,...
      --admission-control-config-file=<path/to/configuration/file>      
    scored: true

  - id: 1.1.37
    text: "Ensure that the AdvancedAuditing argument is not set to false (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      bin_op: and
      test_items:
      - flag: "--feature-gates"
        compare:
          op: nothave
          value: "AdvancedAuditing=false"
        set: true
      - flag: "--audit-policy-file"
        set: true
    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: 1.1.38
    text: "Ensure that the --request-timeout argument is set as appropriate (Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      bin_op: or
      test_items:
      - flag: "--request-timeout"
        set: false
      - flag: "--request-timeout"
        set: true
    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: 1.1.39
    text: "Ensure that the API Server only makes use of Strong Cryptographic Ciphers ( Not Scored)"
    audit: "ps -ef | grep $apiserverbin | grep -v grep"
    tests:
      test_items:
      - flag: "--tls-cipher-suites"
        compare:
          op: eq
          value: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256"
        set: true
    remediation: |
      Edit the API server pod specification file /etc/kubernetes/manifests
      kube-apiserver.yaml on the master node and set the below parameter.
      --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_GCM_SHA256      
    scored: false

- 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: |
      Edit the Scheduler pod specification file $schedulerconf
      file on the master node and set the below parameter.
      --profiling=false      
    scored: true

  - id: 1.2.2
    text: "Ensure that the --address argument is set to 127.0.0.1 (Scored)"
    audit: "ps -ef | grep $schedulerbin | grep -v grep"
    tests:
      bin_op: or
      test_items:
      - flag: "--address"
        compare:
          op: eq
          value: "127.0.0.1"
        set: true
      - flag: "--address"
        set: false
    remediation: |
      Edit the Scheduler pod specification file $schedulerconf
      file on the master node and ensure the correct value for the
      --address parameter.      
    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 $controllermanagerconf
      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 to true (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 $controllermanagerconf
      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 $controllermanagerconf
      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 $controllermanagerconf
      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: "Ensure that the RotateKubeletServerCertificate argument is set to true (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      test_items:
      - flag: "--feature-gates"
        compare:
          op: eq
          value: "RotateKubeletServerCertificate=true"
        set: true
    remediation: |
      Edit the Controller Manager pod specification file $controllermanagerconf
      controller-manager.yaml on the master node and set the --feature-gates parameter to
      include RotateKubeletServerCertificate=true.
      --feature-gates=RotateKubeletServerCertificate=true      
    scored: true

  - id: 1.3.7
    text: "Ensure that the --address argument is set to 127.0.0.1 (Scored)"
    audit: "ps -ef | grep $controllermanagerbin | grep -v grep"
    tests:
      bin_op: or
      test_items:
      - flag: "--address"
        compare:
          op: eq
          value: "127.0.0.1"
        set: true
      - flag: "--address"
        set: false
    remediation: |
      Edit the Controller Manager pod specification file $controllermanagerconf
      controller-manager.yaml on the master node and ensure the correct value
      for the --address parameter.      
    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 /etc/kubernetes/scheduler.conf; then stat -c %a /etc/kubernetes/scheduler.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/scheduler.conf      
    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 /etc/kubernetes/scheduler.conf; then stat -c %U:%G /etc/kubernetes/scheduler.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/scheduler.conf      
    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 /etc/kubernetes/controller-manager.conf; then stat -c %a /etc/kubernetes/controller-manager.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/controller-manager.conf      
    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 /etc/kubernetes/controller-manager.conf; then stat -c %U:%G /etc/kubernetes/controller-manager.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/controller-manager.conf      
    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: eq
          value: false
    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"
    type: "manual"
    tests:
      bin_op: and
      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"
    type: "manual"
    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"
    type: "manual"
    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 a unique Certificate Authority is used for etcd (Not Scored)"
    audit: "ps -ef | grep $etcdbin | grep -v grep"
    type: "manual"
    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 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: 1.6.3
    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: 1.6.4
    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: 1.6.5
    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: 1.6.6
    text: "Configure Image Provenance using ImagePolicyWebhook admission controller (Not Scored)"
    type: "manual"
    remediation: |
      Follow the Kubernetes documentation and setup image provenance.      
    scored: false

  - id: 1.6.7
    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: 1.6.8
    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

- id: 1.7
  text: "PodSecurityPolicies"
  checks:
  - id: 1.7.1
    text: "Do not admit privileged containers (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.privileged field is omitted or set to false.      
    scored: false

  - id: 1.7.2
    text: "Do not admit containers wishing to share the host process ID namespace (Not Scored)"
    type: "manual"
    remediation: |
     Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostPID field is omitted or set to false.     
    scored: false

  - id: 1.7.3
    text: "Do not admit containers wishing to share the host IPC namespace (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostIPC field is omitted or set to false.      
    scored: false

  - id: 1.7.4
    text: "Do not admit containers wishing to share the host network namespace (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.hostNetwork field is omitted or set to false.      
    scored: false

  - id: 1.7.5
    text: " Do not admit containers with allowPrivilegeEscalation (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.allowPrivilegeEscalation field is omitted or set to false.      
    scored: false

  - id: 1.7.6
    text: "Do not admit root containers (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.runAsUser.rule is set to either MustRunAsNonRoot or MustRunAs with the range of UIDs not including 0.      
    scored: false

  - id: 1.7.7
    text: "Do not admit containers with dangerous capabilities (Not Scored)"
    type: "manual"
    remediation: |
      Create a PSP as described in the Kubernetes documentation, ensuring that the .spec.requiredDropCapabilities is set to include either NET_RAW or ALL.      
    scored: false