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Guide to the Secure Configuration of Red Hat OpenShift Container Platform 4

Rules, Groups, and Values defined within the XCCDF Benchmark

  • OpenShift Kube APIServer TLS cert

    OpenShift Kube APIServer TLS cert
    Value
    Show

  • OpenShift Kube APIServer TLS private key

    OpenShift Kube APIServer TLS private key
    Value
    Show

  • OpenShift Kube APIServer kubelet certificate authority

    OpenShift Kube APIServer kubelet certificate authority
    Value
    Show

  • OpenShift Kube APIServer kubelet client cert

    OpenShift Kube APIServer kubelet client cert
    Value
    Show

  • Root of files obtained from OCP nodes

    When scanning OpenShift clusters, some settings are not exposed as files. In the case that they are exported from the cluster (typically as yaml files), this variable determines the directory where...
    Value
    Show

  • OpenShift Kube APIServer kubelet client key

    OpenShift Kube APIServer kubelet client key
    Value
    Show

  • Kubernetes Settings

    Each section of this configuration guide includes information about the configuration of a Kubernetes cluster and a set of recommendations for hardening the configuration. For each hardening recomm...
    Group
    Show

  • HyperShift Cluster Name

    When this parameter is set, we will assume the cluster is a HyperShift cluster, and we will fetch the OCP version api resource for HyperShift cluster
    Value
    Show

  • HyperShift Cluster Namespace Prefix

    The prefix to use for HyperShift Hosted Clusters Namespace. This value will be used when a non-default namespace naming scheme is used. The default scheme is `clusters-(cluster-name)`.
    Value
    Show

  • OCP version api path

    When scanning OpenShift clusters, not all type of cluster has same api resource path for ocp version, ex. HyperShift OCP version api resource path is different than a regular OpenShift Cluster. Thi...
    Value
    Show

  • OCP version yaml path

    When scanning OpenShift clusters, not all type of cluster has same api resource path for ocp version, ex. HyperShift OCP version api resource path is different than a regular OpenShift Cluster. Thi...
    Value
    Show

  • System and Software Integrity

    System and software integrity can be gained by installing antivirus, increasing system encryption strength with FIPS, verifying installed software, enabling SELinux, installing an Intrusion Prevent...
    Group
    Show

  • Ensure that Cluster Version Operator is deployed

    Integrity of the OpenShift platform is handled to start by the cluster version operator. Cluster Version Operator will by default GPG verify the integrity of the release image before applying it. ...
    Rule Medium Severity
    Show

  • Ensure that Cluster Version Operator verifies integrity

    Integrity of the OpenShift platform is handled to start by the cluster version operator. Cluster Version Operator will by default GPG verify the integrity of the release image before applying it. ...
    Rule Medium Severity
    Show

  • Ensure that File Integrity Operator is scanning the cluster

    <a href="https://docs.openshift.com/container-platform/4.7/security/file_integrity_operator/file-integrity-operator-understanding.html">The File Integrity Operator</a> continually runs file integri...
    Rule Medium Severity
    Show

  • System Cryptographic Policies

    OpenShift has the capability to centrally configure cryptographic polices.
    Group
    Show

  • Ensure that the MachineSets provisioned by Azure have disk encryption enabled

    OpenShift has an option to provide the Disk Encryption Set [1] when deploying nodes on Azure. This enabled disk encryption and ensures that the OpenShift nodes have that enabled. [1] https://docs....
    Rule High Severity
    Show

  • Ensure that EBS volumes use by cluster nodes are encrypted

    OpenShift MachineSets can be configured to enable EBS encryption on EBS storage used by cluster nodes. By using EBS encryption, disk contents are encrypted using a AWS KMS key.
    Rule High Severity
    Show

  • Ensure that FIPS mode is enabled on all cluster nodes

    OpenShift has an installation-time flag that can enable FIPS mode for the cluster. The flag 
    fips: true
    must be enabled at install time in the 
    install-config.yaml
    file.
    Rule High Severity
    Show

  • Ensure that the MachineSets provisioned by GCP have disk encryption enabled

    OpenShift has an option to provide the Disk Encryption Set [1] when deploying nodes on GCP. This enabled disk encryption and ensures that the OpenShift nodes have that enabled. [1] https://docs.op...
    Rule High Severity
    Show

  • Ensure that LUKS is configured on worker nodes

    OpenShift has an installation-time flag that can enable LUKS (TPM2 or TANG) full disk encryption at installation. The object <pre>luks</pre> must be present at install time in the <pre>machineconfi...
    Rule High Severity
    Show

  • Ensure that full disk encryption is configured on cluster nodes

    When full disk encryption is chosen as a way to protect card data at rest, OpenShift can provide several solutions depending on the hosting environment. While LUKS (with TPM2 or Tang) can be used ...
    Rule High Severity
    Show

  • Ensure that EBS volumes declared in storageclasses are encrypted

    OpenShift StorageClasses can be configured to enable EBS encryption on EBS volumes that are used later as persistent volumes. By using EBS encryption, disk contents are encrypted using an AWS KMS key.
    Rule High Severity
    Show

  • Kubernetes - Account and Access Control

    In traditional Unix security, if an attacker gains shell access to a certain login account, they can perform any action or access any file to which that account has access. The same idea applies to...
    Group
    Show

  • Restrict Automounting of Service Account Tokens

    Service accounts tokens should not be mounted in pods except where the workload running in the pod explicitly needs to communicate with the API server. To ensure pods do not automatically mount tok...
    Rule Medium Severity
    Show

  • OpenShift Kube API Server

    This section contains recommendations for kube-apiserver configuration.
    Group
    Show

  • API Server Request Timeout

    Enter API Server Request Timeout
    Value
    Show

  • Bind Address of secure API endpoint

    Bind Address of secure API endpoint
    Value
    Show

  • OpenShift Kube APIServer client CA

    OpenShift Kube APIServer client CA
    Value
    Show

  • OpenShift Kube APIServer etcd CA

    OpenShift Kube APIServer etcd CA
    Value
    Show

  • Disable the AlwaysAdmit Admission Control Plugin

    To ensure OpenShift only responses to requests explicitly allowed by the admission control plugin. Check that the config ConfigMap object does not contain the AlwaysAdmit plugin.
    Rule Medium Severity
    Show

  • Ensure that the Admission Control Plugin AlwaysPullImages is not set

    The AlwaysPullImages admission control plugin should be disabled, since it can introduce new failure modes for control plane components if an image registry is unreachable.
    Rule High Severity
    Show

  • Enable the NamespaceLifecycle Admission Control Plugin

    OpenShift enables the NamespaceLifecycle plugin by default.
    Rule Medium Severity
    Show

  • Enable the SecurityContextConstraint Admission Control Plugin

    To ensure pod permissions are managed, make sure that the SecurityContextConstraint admission control plugin is used.
    Rule Medium Severity
    Show

  • Ensure that the admission control plugin SecurityContextDeny is set if PodSecurityPolicy is not used

    Instead of using a customized SecurityContext for pods, a Pod Security Policy (PSP) or a SecurityContextConstraint should be used. These are cluster-level resources that control the actions that a ...
    Rule Medium Severity
    Show

  • Ensure catch-all FlowSchema object for API Priority and Fairness Exists

    Using <code>APIPriorityAndFairness</code> feature provides a fine-grained way to control the behaviour of the Kubernetes API server in an overload situation. The well-known FlowSchema <code>catch-a...
    Rule Medium Severity
    Show

  • Enable the APIPriorityAndFairness feature gate

    To limit the rate at which the API Server accepts requests, make sure that the API Priority and Fairness feature is enabled. Using <code>APIPriorityAndFairness</code> feature provides a fine-graine...
    Rule Medium Severity
    Show

  • Ensure catch-all FlowSchema object for API Priority and Fairness Exists (v1alpha1)

    Using <code>APIPriorityAndFairness</code> feature provides a fine-grained way to control the behaviour of the Kubernetes API server in an overload situation. The well-known FlowSchema <code>catch-a...
    Rule Medium Severity
    Show

  • Ensure catch-all FlowSchema object for API Priority and Fairness Exists

    Using <code>APIPriorityAndFairness</code> feature provides a fine-grained way to control the behaviour of the Kubernetes API server in an overload situation. The well-known FlowSchema <code>catch-a...
    Rule Medium Severity
    Show

  • Configure the Kubernetes API Server Maximum Retained Audit Logs

    To configure how many rotations of audit logs are retained, edit the <code>openshift-kube-apiserver</code> configmap and set the <code>audit-log-maxbackup</code> parameter to <code>10</code> or to ...
    Rule Low Severity
    Show

  • Configure Kubernetes API Server Maximum Audit Log Size

    To rotate audit logs upon reaching a maximum size, edit the <code>openshift-kube-apiserver</code> configmap and set the <code>audit-log-maxsize</code> parameter to an appropriate size in MB. For ex...
    Rule Medium Severity
    Show

  • Configure the Audit Log Path

    To enable auditing on the Kubernetes API Server, the audit log path must be set. Edit the <code>openshift-kube-apiserver</code> configmap and set the <code>audit-log-path</code> to a suitable path ...
    Rule High Severity
    Show

  • The authorization-mode cannot be AlwaysAllow

    Do not always authorize all requests.
    Rule Medium Severity
    Show

  • Ensure authorization-mode Node is configured

    Restrict kubelet nodes to reading only objects associated with them.
    Rule Medium Severity
    Show

  • Ensure authorization-mode RBAC is configured

    To ensure OpenShift restricts different identities to a defined set of operations they are allowed to perform, check that the API server's <code>authorization-mode</code> configuration option list ...
    Rule Medium Severity
    Show

  • Disable basic-auth-file for the API Server

    Basic Authentication should not be used for any reason. If needed, edit API Edit the <code>openshift-kube-apiserver</code> configmap and remove the <code>basic-auth-file</code> parameter: <pre> "ap...
    Rule Medium Severity
    Show

  • Ensure that the bindAddress is set to a relevant secure port

    The bindAddress is set by default to 0.0.0.0:6443, and listening with TLS enabled.
    Rule Low Severity
    Show

  • Ensure the openshift-oauth-apiserver service uses TLS

    By default, the OpenShift API Server uses TLS. HTTPS should be used for connections between openshift-apiserver and kube-apiserver. By default, the OpenShift OAuth API Server uses Intermediate prof...
    Rule Medium Severity
    Show

  • Configure the etcd Certificate Authority for the API Server

    To ensure etcd is configured to make use of TLS encryption for client connections, follow the OpenShift documentation and setup the TLS connection between the API Server and etcd. Then, verify that...
    Rule Medium Severity
    Show

  • Configure the etcd Certificate for the API Server

    To ensure etcd is configured to make use of TLS encryption for client communications, follow the OpenShift documentation and setup the TLS connection between the API Server and etcd. Then, verify t...
    Rule Medium Severity
    Show

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