RHSA-2023:6828 - Security Advisory

Topic

Updated images are now available for Red Hat Advanced Cluster Security.

Red Hat Product Security has rated this update as having a security impact of Important. 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

Updated images are now available for Red Hat Advanced Cluster Security.

Security Fix(es):

• golang: net/http, x/net/http2: rapid stream resets can cause excessive work (Rapid Reset Attack) (CVE-2023-39325)

A Red Hat Security Bulletin which addresses further details about the Rapid Reset flaw is available in the References section.

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.

This release of RHACS 4.1 includes updates to RHEL base images and includes the following fixes:

• All containers have been rebuilt and now include container CVE fixes for CVE-2023-44487: Flaw in handling multiplexed streams in the HTTP/2 protocol and CVE-2023-40217: Python 3 ssl.SSLSocket vulnerability.
• The HTTP/2 functionality in the RHACS Operator webhook has been disabled to mitigate CVE-2023-44487.

Solution

If you are using an earlier version of RHACS 4.1, you are advised to upgrade to patch release 4.1.5.

Affected Products

• Red Hat Advanced Cluster Security for Kubernetes 4 x86_64
• Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4 s390x
• Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4 ppc64le

Fixes

• BZ - 2243296 - CVE-2023-39325 golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)
• ROX-20391 - hardening: disable http/2 webhook in ACS operator to mitigate CVE-2023-44487
• ROX-20542 - hardening: disable http/2 in operator kube-rbac-proxy to mitigate CVE-2023-44487
• ROX-20682 - Release RHACS 4.1.5

CVEs

• CVE-2023-39325
• CVE-2023-40217
• CVE-2023-44487

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/vulnerabilities/RHSB-2023-003
• https://docs.openshift.com/acs/4.1/release_notes/41-release-notes.html