RHSA-2021:4118 - Security Advisory

Topic

Red Hat OpenShift Container Platform release 4.9.6 is now available with
updates to packages and images that fix several bugs and add enhancements.

This release includes a security update for Red Hat OpenShift Container Platform 4.9.

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.

This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.9.6. See the following advisory for the container images for this release:

https://access.redhat.com/errata/RHBA-2021:4119

Security Fix(es):

• haproxy: does not ensure that the scheme and path portions of a URI have

the expected characters (CVE-2021-39240)

• haproxy: an HTTP method name may contain a space followed by the name of

a protected resource (CVE-2021-39241)

• haproxy: it can lead to a situation with an attacker-controlled HTTP Host

header because a mismatch between Host and authority is mishandled
(CVE-2021-39242)

• haproxy: request smuggling attack or response splitting via duplicate

content-length header (CVE-2021-40346)

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.

All OpenShift Container Platform 4.9 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.9/updating/updating-cluster-between-minor.html#understanding-upgrade-channels_updating-cluster-between-minor

Solution

For OpenShift Container Platform 4.9 see the following documentation, which
will be updated shortly for this release, for important instructions on how
to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.openshift.com/container-platform/4.9/release_notes/ocp-4-9-release-notes.html

Details on how to access this content are available at
https://docs.openshift.com/container-platform/4.9/updating/updating-cluster-cli.html

Affected Products

• Red Hat OpenShift Container Platform 4.9 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform 4.9 for RHEL 7 x86_64
• Red Hat OpenShift Container Platform for Power 4.9 for RHEL 8 ppc64le
• Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.9 for RHEL 8 s390x
• Red Hat OpenShift Container Platform for ARM 64 4.9 aarch64

Fixes

• BZ - 1995104 - CVE-2021-39240 haproxy: does not ensure that the scheme and path portions of a URI have the expected characters
• BZ - 1995107 - CVE-2021-39241 haproxy: an HTTP method name may contain a space followed by the name of a protected resource
• BZ - 1995112 - CVE-2021-39242 haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch between Host and authority is mishandled
• BZ - 2000599 - CVE-2021-40346 haproxy: request smuggling attack or response splitting via duplicate content-length header

CVEs

• CVE-2021-39240
• CVE-2021-39241
• CVE-2021-39242
• CVE-2021-40346

References

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