The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.

The remote Red Hat Enterprise Linux CoreOS 4 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2021:0030 advisory.

  - kubernetes: compromised node could escalate to cluster level privileges (CVE-2020-8559)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Red Hat Enterprise Linux CoreOS 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:5363 advisory.

  - kubernetes: improper validation of URL redirection in the Kubernetes API server allows an attacker-     controlled Kubelet to redirect API server requests from streaming endpoints (CVE-2018-1002102)

  - kubernetes: compromised node could escalate to cluster level privileges (CVE-2020-8559)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6     are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to     escalate privileges from a node compromise to a full cluster compromise. (CVE-2020-8559)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6
    are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to
    escalate privileges from a node compromise to a full cluster compromise. (CVE-2020-8559)

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account
    for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by
    kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod.
    If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node
    and cause the node to fail. (CVE-2020-8557)

  - The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6
    are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to
    escalate privileges from a node compromise to a full cluster compromise. (CVE-2020-8559)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5765 advisory.

    - x86/speculation: Add SRBDS vulnerability and mitigation documentation (Mark Gross)  [Orabug: 31446720]     {CVE-2020-0543}
    - x86/speculation: Add Special Register Buffer Data Sampling (SRBDS) mitigation (Mark Gross)  [Orabug:
    31446720]  {CVE-2020-0543}
    - x86/cpu: Add 'table' argument to cpu_matches() (Mark Gross)  [Orabug: 31446720]  {CVE-2020-0543}
    - x86/cpu: Add a steppings field to struct x86_cpu_id (Mark Gross)  [Orabug: 31446720]  {CVE-2020-0543}
    - Address Kata CVE-2020-2023
    - Address Kata CVE-2020-2024
    - Address Kata CVE-2020-2025
    - Address Kata CVE-2020-2026

    kata
    - Address CVE-2020-2023
    - Address CVE-2020-2024
    - Address CVE-2020-2025
    - Address CVE-2020-2026

    kubernetes
    - CVE-2020-8559: Privilege escalation from compromised node to cluster
    - CVE-2020-8557: Node disk DOS by writing to container /etc/hosts
    - Update dependency on Kata containers to a build that includes fixes for CVE-2020-2023 thru CVE-2020-2026

    kubernetes
    - CVE-2020-15104:
      Incorrect validation of wildcard DNS Subject Alternative Names
    - CVE-2020-8559: Privilege escalation from compromised node to cluster
    - CVE-2020-8557: Node disk DOS by writing to container /etc/hosts
    - Update Kubernetes to use Kata 1.7.3-1.0.7 to address CVE-2020-2023 thru CVE-2020-2026

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5766 advisory.

    - x86/speculation: Add SRBDS vulnerability and mitigation documentation (Mark Gross)  [Orabug: 31446720]     {CVE-2020-0543}
    - x86/speculation: Add Special Register Buffer Data Sampling (SRBDS) mitigation (Mark Gross)  [Orabug:
    31446720]  {CVE-2020-0543}
    - x86/cpu: Add 'table' argument to cpu_matches() (Mark Gross)  [Orabug: 31446720]  {CVE-2020-0543}
    - x86/cpu: Add a steppings field to struct x86_cpu_id (Mark Gross)  [Orabug: 31446720]  {CVE-2020-0543}
    - Address Kata CVE-2020-2023
    - Address Kata CVE-2020-2024
    - Address Kata CVE-2020-2025
    - Address Kata CVE-2020-2026

    kata
    - Address CVE-2020-2023
    - Address CVE-2020-2024
    - Address CVE-2020-2025
    - Address CVE-2020-2026


    kubernetes
    - CVE-2020-8559: Privilege escalation from compromised node to cluster
    - CVE-2020-8557: Node disk DOS by writing to container /etc/hosts
    - Update dependency on Kata containers to a build that includes fixes for CVE-2020-2023 thru CVE-2020-2026

    olcne
    - CVE-2020-8559: Privilege escalation from compromised node to cluster
    - CVE-2020-8557: Node disk DOS by writing to container /etc/hosts

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5767 advisory.

    - CVE-2020-8559: Privilege escalation from compromised node to cluster

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 / 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2021:0030 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    Security Fix(es):

    * kubernetes: compromised node could escalate to cluster level privileges     (CVE-2020-8559)

    For more details about the security issue(s), including the impact, a CVSS     score, acknowledgments, and other related information, refer to the CVE     page(s) listed in the References section.

    This advisory contains the RPM packages for Red Hat OpenShift Container     Platform 4.4.32. See the following advisory for the container images for     this release:

    https://access.redhat.com/errata/RHBA-2021:0029

    All OpenShift Container Platform 4.4 users are advised to upgrade to these     updated packages and images when they are available in the appropriate     release channel. To check for available updates, use the OpenShift Console     or the CLI oc command. Instructions for upgrading a cluster are available     at     https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-between-     minor.html#understanding-upgrade-channels_updating-cluster-between-minor.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:5363 advisory.

    Red Hat OpenShift Container Platform is Red Hat's cloud computing     Kubernetes application platform solution designed for on-premise or private     cloud deployments.

    Security Fix(es):

    * kubernetes: compromised node could escalate to cluster level privileges (CVE-2020-8559)

    * kubernetes: improper validation of URL redirection in the Kubernetes API server allows an attacker-     controlled Kubelet to redirect API server requests from streaming endpoints (CVE-2018-1002102)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    This advisory contains the RPM packages for Red Hat OpenShift Container     Platform 3.11.346. See the following advisory for the container images for this release:

    https://access.redhat.com/errata/RHBA-2020:5362

    All OpenShift Container Platform 3.11 users are advised to upgrade to these     updated packages and images.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the kubernetes package has been released.

ID	Name	Product	Family	Severity
312516	RHCOS 4 : OpenShift Container Platform 4.4.32 (RHSA-2021:0030)	Nessus	Red Hat Local Security Checks	medium
312464	RHCOS 3 : OpenShift Container Platform 3.11.346 (RHSA-2020:5363)	Nessus	Red Hat Local Security Checks	medium
257778	Linux Distros Unpatched Vulnerability : CVE-2020-8559	Nessus	Misc.	medium
409242	SCA: security update for k8s.io/apimachinery, k8s.io/kubernetes (GHSA-33c5-9fx5-fvjm)	Tenable Cloud Security	SCA Checks	medium
409242	SCA: security update for k8s.io/apimachinery, k8s.io/kubernetes (GHSA-33c5-9fx5-fvjm)	Tenable Self-Hosted Container Security	SCA Checks	medium
405061	Alpine: multiple k3s packages: security update to 1.18.6.1-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
405061	Alpine: multiple k3s packages: security update to 1.18.6.1-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
180974	Oracle Linux 7 : Unbreakable Enterprise kernel-container kata-image kata-runtime kata kubernetes kubernetes istio olcne (ELSA-2020-5765)	Nessus	Oracle Linux Local Security Checks	high
180954	Oracle Linux 7 : Unbreakable Enterprise kernel-container kata-image kata-runtime kata kubernetes olcne (ELSA-2020-5766)	Nessus	Oracle Linux Local Security Checks	high
180914	Oracle Linux 7 : kubernetes (ELSA-2020-5767)	Nessus	Oracle Linux Local Security Checks	medium
400356	Alpine: multiple k3s packages: security update to 1.18.6-r0 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
400356	Alpine: multiple k3s packages: security update to 1.18.6-r0 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
144942	RHEL 7 / 8 : OpenShift Container Platform 4.4.32 (RHSA-2021:0030)	Nessus	Red Hat Local Security Checks	medium
144410	RHEL 7 : OpenShift Container Platform 3.11.346 (RHSA-2020:5363)	Nessus	Red Hat Local Security Checks	medium
140715	Photon OS 2.0: Kubernetes PHSA-2020-2.0-0285	Nessus	PhotonOS Local Security Checks	medium
140706	Photon OS 3.0: Kubernetes PHSA-2020-3.0-0142	Nessus	PhotonOS Local Security Checks	medium

Detections

Analytics

CVE-2020-8559

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

high

high

medium

medium

medium

medium

medium

medium

medium