RHSA-2021:3915 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 3.11.542 is now available with
updates to packages and images that fix several bugs and add enhancements.

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: 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.

Solution

Before applying this update, ensure all previously released errata relevant
to your system is applied.

See the following documentation, which will be updated shortly for release
3.11.542, for important instructions on how to upgrade your cluster and fully
apply this asynchronous errata update:

https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258.

Affected Products

• Red Hat OpenShift Container Platform 3.11 x86_64
• Red Hat OpenShift Container Platform for Power 3.11 ppc64le

Fixes

• BZ - 1835977 - CVE-2020-8557 kubernetes: Node disk DOS by writing to container /etc/hosts
• BZ - 1991537 - Kuryr controller in CrashLoopBackOff due to missing loadbalancer
• BZ - 1995433 - Router generates duplicate STATS_PASSWORD and ROUTER_CIPHERS env variables while running router creation task
• BZ - 2002171 - [Kuryr][3.11] CrashLoopBackOff on starting Kuryr Controller
• BZ - 2002548 - [Kuryr][3.11] Kuryr Controller never becomes ready on large scale environments
• BZ - 2012587 - Travis CI is broken for Python 2.7

CVEs

• CVE-2020-8557

References

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