RHSA-2020:1936 - Security Advisory

Topic

An update for haproxy is now available for Red Hat OpenShift Container
Platform 4.4.

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):

• haproxy: malformed HTTP/2 requests could lead to out-of-bounds writes (CVE-2020-11100)
• haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated "chunked" value (CVE-2019-18277)
• haproxy: HTTP/2 implementation was vulnerable to intermediary encapsulation attacks (CVE-2019-19330)

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 4.4 see the following documentation, which
will be updated shortly for release 4.4.3, for important instructions on
how to upgrade your cluster and fully apply this asynchronous errata
update:

https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html

Details on how to access this content are available at
https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

Affected Products

• Red Hat OpenShift Container Platform 4.4 for RHEL 8 x86_64
• Red Hat OpenShift Container Platform 4.4 for RHEL 7 x86_64

Fixes

• BZ - 1759697 - CVE-2019-18277 haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated "chunked" value
• BZ - 1777584 - CVE-2019-19330 haproxy: HTTP/2 implementation vulnerable to intermediary encapsulation attacks
• BZ - 1819111 - CVE-2020-11100 haproxy: malformed HTTP/2 requests can lead to out-of-bounds writes

CVEs

• CVE-2019-18277
• CVE-2019-19330
• CVE-2020-11100

References

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