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.

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

  - 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)

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

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 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:3915 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: Node disk DOS by writing to container /etc/hosts     (CVE-2020-8557)

    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.

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 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3808 advisory.

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

    Jenkins is a continuous integration server that monitors executions of repeated jobs, such as building a     software project or jobs run by cron.

    Security Fix(es):

    * jenkins: Stored XSS vulnerability in job build time trend (CVE-2020-2220)

    * jenkins: Stored XSS vulnerability in upstream cause (CVE-2020-2221)

    * jenkins: Stored XSS vulnerability in 'keep forever' badge icons (CVE-2020-2222)

    * jenkins: Stored XSS vulnerability in console links (CVE-2020-2223)

    * kubernetes: Node disk DOS by writing to container /etc/hosts (CVE-2020-8557)

    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.

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.

The remote Redhat Enterprise Linux 7 / 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2020:3579 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: Node disk DOS by writing to container /etc/hosts (CVE-2020-8557)

    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.

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 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3519 advisory.

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

    Jenkins is a continuous integration server that monitors executions of repeated jobs, such as building a     software project or jobs run by cron.

    Security Fix(es):

    * jenkins: Stored XSS vulnerability in job build time trend (CVE-2020-2220)

    * jenkins: Stored XSS vulnerability in upstream cause (CVE-2020-2221)

    * jenkins: Stored XSS vulnerability in 'keep forever' badge icons (CVE-2020-2222)

    * jenkins: Stored XSS vulnerability in console links (CVE-2020-2223)

    * kubernetes: Node disk DOS by writing to container /etc/hosts (CVE-2020-8557)

    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.

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.

ID	Name	Product	Family	Severity
259096	Linux Distros Unpatched Vulnerability : CVE-2020-8557	Nessus	Misc.	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
154737	RHEL 7 : OpenShift Container Platform 3.11.542 (RHSA-2021:3915)	Nessus	Red Hat Local Security Checks	medium
140749	RHEL 7 / 8 : OpenShift Container Platform 4.3.38 jenkins and openshift (RHSA-2020:3808)	Nessus	Red Hat Local Security Checks	critical
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
140129	RHEL 7 / 8 : OpenShift Container Platform 4.4.19 openshift (RHSA-2020:3579)	Nessus	Red Hat Local Security Checks	medium
139772	RHEL 7 / 8 : OpenShift Container Platform 4.5.7 jenkins and openshift (RHSA-2020:3519)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2020-8557

medium

Tenable Plugins

medium

high

high

medium

medium

critical

medium

medium

medium

medium