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Rancher Government Solutions RKE2 Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Rancher RKE2 must store only cryptographic representations of passwords.

    <VulnDiscussion>Secrets, such as passwords, keys, tokens, and certificates should not be stored as environment variables. These environment v...
    Rule Medium Severity
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  • SRG-APP-000190-CTR-000500

    <GroupDescription></GroupDescription>
    Group
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  • SRG-APP-000014-CTR-000035

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must protect authenticity of communications sessions with the use of FIPS-validated 140-2 or 140-3 security requirements for cryptographic modules.

    &lt;VulnDiscussion&gt;Use strong TLS settings. RKE2 uses FIPS validated BoringCrypto modules. RKE2 Server can prohibit the use of SSL and unauthor...
    Rule High Severity
    Show

  • SRG-APP-000023-CTR-000055

    <GroupDescription></GroupDescription>
    Group
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  • RKE2 must use a centralized user management solution to support account management functions.

    &lt;VulnDiscussion&gt;The Kubernetes Controller Manager is a background process that embeds core control loops regulating cluster system state thro...
    Rule Medium Severity
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  • SRG-APP-000026-CTR-000070

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 components must be configured in accordance with the security configuration settings based on DOD security configuration or implementation guidance, including SRGs, STIGs, NSA configuration guides, CTOs, and DTMs.

    &lt;VulnDiscussion&gt;Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of re-establishing...
    Rule Medium Severity
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  • SRG-APP-000033-CTR-000090

    <GroupDescription></GroupDescription>
    Group
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  • The Kubernetes Controller Manager must have secure binding.

    &lt;VulnDiscussion&gt;Limiting the number of attack vectors and implementing authentication and encryption on the endpoints available to external s...
    Rule Medium Severity
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  • SRG-APP-000033-CTR-000090

    <GroupDescription></GroupDescription>
    Group
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  • The Kubernetes Kubelet must have anonymous authentication disabled.

    &lt;VulnDiscussion&gt;RKE2 registry is used to store images and is the keeper of truth for trusted images within the platform. To guarantee the ima...
    Rule Medium Severity
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  • SRG-APP-000033-CTR-000095

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Kubernetes API server must have the insecure port flag disabled.

    &lt;VulnDiscussion&gt;By default, the API server will listen on two ports. One port is the secure port and the other port is called the "localhost ...
    Rule High Severity
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  • SRG-APP-000033-CTR-000095

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Kubernetes Kubelet must have the read-only port flag disabled.

    &lt;VulnDiscussion&gt;Kubelet serves a small REST API with read access to port 10255. The read-only port for Kubernetes provides no authentication ...
    Rule High Severity
    Show

  • SRG-APP-000033-CTR-000095

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Kubernetes API server must have the insecure bind address not set.

    &lt;VulnDiscussion&gt;By default, the API server will listen on two ports and addresses. One address is the secure address and the other address is...
    Rule High Severity
    Show

  • SRG-APP-000033-CTR-000095

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Kubernetes kubelet must enable explicit authorization.

    &lt;VulnDiscussion&gt;Kubelet is the primary agent on each node. The API server communicates with each kubelet to perform tasks such as starting/st...
    Rule High Severity
    Show

  • SRG-APP-000033-CTR-000100

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Kubernetes API server must have anonymous authentication disabled.

    &lt;VulnDiscussion&gt;The Kubernetes API Server controls Kubernetes via an API interface. A user who has access to the API essentially has root acc...
    Rule High Severity
    Show

  • SRG-APP-000100-CTR-000200

    <GroupDescription></GroupDescription>
    Group
    Show

  • All audit records must identify any containers associated with the event within Rancher RKE2.

    &lt;VulnDiscussion&gt;Ensure that the --audit-log-maxage argument is set to 30 or as appropriate. Retaining logs for at least 30 days ensures that...
    Rule Medium Severity
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  • SRG-APP-000133-CTR-000300

    <GroupDescription></GroupDescription>
    Group
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  • Configuration and authentication files for Rancher RKE2 must be protected.

    &lt;VulnDiscussion&gt;There are various configuration files, logs, access credentials, and other files stored on the host filesystem that contain s...
    Rule Medium Severity
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  • SRG-APP-000141-CTR-000315

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must be configured with only essential configurations.

    &lt;VulnDiscussion&gt;It is important to disable any unnecessary components to reduce any potential attack surfaces. RKE2 allows disabling the fo...
    Rule Medium Severity
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  • SRG-APP-000142-CTR-000325

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 runtime must enforce ports, protocols, and services that adhere to the PPSM CAL.

    &lt;VulnDiscussion&gt;Ports, protocols, and services within the RKE2 runtime must be controlled and conform to the PPSM CAL. Those ports, protocols...
    Rule Medium Severity
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  • SRG-APP-000171-CTR-000435

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must terminate all network connections associated with a communications session at the end of the session, or as follows: for in-band management sessions (privileged sessions), the session must be terminated after five minutes of inactivity.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
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  • SRG-APP-000233-CTR-000585

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 runtime must isolate security functions from nonsecurity functions.

    &lt;VulnDiscussion&gt;RKE2 runs as isolated as possible. RKE2 is a container-based Kubernetes distribution. A container image is essentially a com...
    Rule Medium Severity
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  • SRG-APP-000243-CTR-000600

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 runtime must maintain separate execution domains for each container by assigning each container a separate address space to prevent unauthorized and unintended information transfer via shared system resources.

    &lt;VulnDiscussion&gt;Separating user functionality from management functionality is a requirement for all the components within the Kubernetes Con...
    Rule Medium Severity
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  • SRG-APP-000340-CTR-000770

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must prevent nonprivileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

    &lt;VulnDiscussion&gt;Admission controllers intercept requests to the Kubernetes API before an object is instantiated. Enabling the admissions webh...
    Rule Medium Severity
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  • SRG-APP-000378-CTR-000880

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must prohibit the installation of patches, updates, and instantiation of container images without explicit privileged status.

    &lt;VulnDiscussion&gt;Controlling access to those users and roles responsible for patching and updating RKE2 reduces the risk of untested or potent...
    Rule Medium Severity
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  • SRG-APP-000429-CTR-001060

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 keystore must implement encryption to prevent unauthorized disclosure of information at rest within Rancher RKE2.

    &lt;VulnDiscussion&gt;Encrypting secrets at rest in etcd. By default, RKE2 will create an encryption key and configuration file and pass these to ...
    Rule High Severity
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  • SRG-APP-000454-CTR-001110

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must remove old components after updated versions have been installed.

    &lt;VulnDiscussion&gt;Previous versions of Rancher RKE2 components that are not removed after updates have been installed may be exploited by adver...
    Rule Medium Severity
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  • SRG-APP-000456-CTR-001125

    <GroupDescription></GroupDescription>
    Group
    Show

  • Rancher RKE2 registry must contain the latest images with most recent updates and execute within Rancher RKE2 runtime as authorized by IAVM, CTOs, DTMs, and STIGs.

    &lt;VulnDiscussion&gt;Software supporting RKE2, images in the registry must stay up to date with the latest patches, service packs, and hot fixes. ...
    Rule Medium Severity
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  • SRG-APP-000131-CTR-000285

    <GroupDescription></GroupDescription>
    Group
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  • Rancher RKE2 must be built from verified packages.

    &lt;VulnDiscussion&gt;Only RKE2 images that have been properly signed by Rancher Government's authorized key will be deployed to ensure the cluster...
    Rule Medium Severity
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Node 2

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