RHSA-2020:3184 - Security Advisory

Topic

An update for openshift-enterprise-hyperkube-container is now available for Red Hat OpenShift Container Platform 4.3.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: A flaw was found in Kubernetes that allows attackers on adjacent networks to reach services exposed on localhost ports, previously thought to be unreachable. This flaw allows an attacker to gain privileges or access confidential information for any services listening on localhost ports that are not protected by authentication. (CVE-2020-8558)

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.

Solution

For OpenShift Container Platform 4.3 see the following documentation, which
will be updated shortly for release 4.3.32, for important instructions on
how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.openshift.com/container-platform/4.3/release_notes/ocp-4-3-release-notes.html

Details on how to access this content are available at
https://docs.openshift.com/container-platform/4.3/updating/updating-cluster-cli.html.

Affected Products

• Red Hat OpenShift Container Platform 4.3 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform 4.3 for RHEL 7 x86_64
• Red Hat OpenShift Container Platform for Power 4.3 for RHEL 8 ppc64le
• Red Hat OpenShift Container Platform for Power 4.3 for RHEL 7 ppc64le
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.3 for RHEL 8 s390x
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.3 for RHEL 7 s390x

Fixes

• BZ - 1843358 - CVE-2020-8558 kubernetes: node localhost services reachable via martian packets

CVEs

• CVE-2020-8558
• CVE-2020-12049

References

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