RHSA-2020:2443 - Security Advisory

Topic

An update for containernetworking-plugins 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):

• containernetworking/plugins: A vulnerability in IPv4 networking implementations allowed malicious containers in Kubernetes clusters to perform man-in-the-middle (MitM) attacks by redirecting traffic to the malicious container with “rogue” IPv6 router advertisements. (CVE-2020-10749)

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 4.3.25, 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 - 1833220 - CVE-2020-10749 containernetworking/plugins: IPv6 router advertisements allow for MitM attacks on IPv4 clusters

CVEs

• CVE-2020-10749

References

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