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Red Hat Security Advisory

Synopsis:          Moderate: OpenShift Container Platform 4.3.31 openshift-enterprise-hyperkube-container security update
Advisory ID:       RHSA-2020:3184-01
Product:           Red Hat OpenShift Enterprise
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:3184
Issue date:        2020-08-05
CVE Names:         CVE-2020-8558 CVE-2020-12049
====================================================================
1. Summary:

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.

2. 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.

3. 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-rel
ease-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.

4. Bugs fixed (https://bugzilla.redhat.com/):

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

5. References:

https://access.redhat.com/security/cve/CVE-2020-8558
https://access.redhat.com/security/cve/CVE-2020-12049
https://access.redhat.com/security/updates/classification/#moderate

6. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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