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RHCOS 3 : OpenShift Container Platform 3.11.374 (RHSA-2021:0079)

medium Nessus Plugin ID 312419

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Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 3.11.374.

Description

The remote Red Hat Enterprise Linux CoreOS 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0079 advisory.

 - golang.org/x/crypto: Keystream loop in amd64 assembly when overflowing 32-bit counter (CVE-2019-11840)

 - kubernetes: MITM using LoadBalancer or ExternalIPs (CVE-2020-8554)

 - python-urllib3: CRLF injection via HTTP request method (CVE-2020-26137)

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

Solution

Update the RHCOS OpenShift Container Platform 3.11.374 package based on the guidance in RHSA-2021:0079.

See Also

https://access.redhat.com/security/updates/classification/#moderate

https://bugzilla.redhat.com/show_bug.cgi?id=1691529

https://bugzilla.redhat.com/show_bug.cgi?id=1866789

https://bugzilla.redhat.com/show_bug.cgi?id=1870050

https://bugzilla.redhat.com/show_bug.cgi?id=1881319

https://bugzilla.redhat.com/show_bug.cgi?id=1883632

https://bugzilla.redhat.com/show_bug.cgi?id=1891051

http://www.nessus.org/u?70f27d52

https://access.redhat.com/errata/RHSA-2021:0079

Plugin Details

Severity: Medium

ID: 312419

File Name: rhcos-RHSA-2021-0079.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/6/2026

Updated: 5/6/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-26137

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 5.5

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:atomic-openshift-web-console, p-cpe:/a:redhat:enterprise_linux:atomic-openshift, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-clients, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-clients-redistributable, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-dockerregistry, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-master, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-node, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-pod, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-sdn-ovs, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-tests, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-docker-excluder, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-excluder, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-template-service-broker, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-hyperkube, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-hypershift, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-descheduler, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-node-problem-detector, p-cpe:/a:redhat:enterprise_linux:prometheus-node-exporter, p-cpe:/a:redhat:enterprise_linux:atomic-enterprise-service-catalog, p-cpe:/a:redhat:enterprise_linux:atomic-enterprise-service-catalog-svcat, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-cluster-autoscaler, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-metrics-server, p-cpe:/a:redhat:enterprise_linux:atomic-openshift-service-idler, p-cpe:/a:redhat:enterprise_linux:golang-github-openshift-oauth-proxy, p-cpe:/a:redhat:enterprise_linux:openshift-enterprise-autoheal, p-cpe:/a:redhat:enterprise_linux:openshift-enterprise-cluster-capacity, p-cpe:/a:redhat:enterprise_linux:prometheus, p-cpe:/a:redhat:enterprise_linux:prometheus-alertmanager, p-cpe:/a:redhat:enterprise_linux:python2-urllib3, p-cpe:/a:redhat:enterprise_linux:python-urllib3, cpe:/o:redhat:enterprise_linux:7:coreos, p-cpe:/a:redhat:enterprise_linux:golang-github-prometheus-alertmanager, p-cpe:/a:redhat:enterprise_linux:golang-github-prometheus-node_exporter, p-cpe:/a:redhat:enterprise_linux:golang-github-prometheus-prometheus

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/20/2021

Vulnerability Publication Date: 5/9/2019

Reference Information

CVE: CVE-2019-11840, CVE-2020-26137, CVE-2020-8554

CWE: 113, 200, 330

RHSA: 2021:0079