RHSA-2023:6145 - Security Advisory

Topic

Multicluster Engine for Kubernetes 2.2.9 General Availability release images,
which contain security updates and fix bugs.

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 links in the References section.

Description

Multicluster Engine for Kubernetes 2.2.9 images

Multicluster engine for Kubernetes provides the foundational components
that are necessary for the centralized management of multiple
Kubernetes-based clusters across data centers, public clouds, and private
clouds.

You can use the engine to create new Red Hat OpenShift Container Platform
clusters or to bring existing Kubernetes-based clusters under management by
importing them. After the clusters are managed, you can use the APIs that
are provided by the engine to distribute configuration based on placement
policy.

Security fix(es):
CVE-2023-44487 HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack
CVE-2023-39325 golang: net/http, x/net/http2: rapid stream resets can cause excessive work
CVE-2023-39321 golang: crypto/tls: panic when processing post-handshake message on QUIC connections
CVE-2023-39319 golang: html/template: improper handling of special tags within script contexts
CVE-2023-39318 golang: html/template: improper handling of HTML-like comments within script contexts
CVE-2023-39322 golang: crypto/tls: lack of a limit on buffered post-handshake

Solution

For multicluster engine for Kubernetes, see the following documentation for
details on how to install the images:

https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.7/html/clusters/cluster_mce_overview#installing-while-connected-online-mce

Affected Products

• multicluster engine for Kubernetes Text-only Advisories x86_64

Fixes

• BZ - 2237773 - CVE-2023-39319 golang: html/template: improper handling of special tags within script contexts
• BZ - 2237776 - CVE-2023-39318 golang: html/template: improper handling of HTML-like comments within script contexts
• BZ - 2237777 - CVE-2023-39321 golang: crypto/tls: panic when processing post-handshake message on QUIC connections
• BZ - 2237778 - CVE-2023-39322 golang: crypto/tls: lack of a limit on buffered post-handshake
• 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)

CVEs

• CVE-2023-3341
• CVE-2023-4527
• CVE-2023-4806
• CVE-2023-4813
• CVE-2023-4911
• CVE-2023-29491
• CVE-2023-30630
• CVE-2023-39318
• CVE-2023-39319
• CVE-2023-39321
• CVE-2023-39322
• 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