Important: RHACS 4.1 enhancement and security update

Topic

Updated images are now available for Red Hat Advanced Cluster Security (RHACS). The updated image includes new features and bug fixes.

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

This release of RHACS 4.1.4 includes fixes for the following security vulnerabilities:

• golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)
• HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)
• Various CVEs in containers for glibc security issues

A Red Hat Security Bulletin which addresses further details about this 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.

RHACS 4.1.4 includes a new default policy called "Rapid Reset: Denial of Service Vulnerability in HTTP/2 Protocol". This policy alerts on deployments with images containing components that are susceptible to a Denial of Service (DoS) vulnerability for HTTP/2 servers, based on CVE-2023-44487 and CVE-2023-39325. This policy applies to the build or deploy life cycle stage.

Solution

If you are using an earlier version of RHACS 4.1, you are advised to upgrade to patch release 4.1.4.

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 - 2242803 - CVE-2023-44487 HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)
• BZ - 2243296 - CVE-2023-39325 golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)
• ROX-20196 - Release RHACS 4.1.4

CVEs

• CVE-2023-3341
• CVE-2023-3899
• CVE-2023-4527
• CVE-2023-4806
• CVE-2023-4813
• CVE-2023-4911
• CVE-2023-29491
• CVE-2023-30630
• CVE-2023-39325
• 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