The following data is constructed from data provided by Red Hat's json file at:
https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_6256.json
Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.
- Packet Storm Staff
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Red Hat Security Advisory
Synopsis:           Important: OpenShift Container Platform 4.13.21 security and extras update
Advisory ID:        RHSA-2023:6256-01
Product:            Red Hat OpenShift Enterprise
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:6256
Issue date:         2023-11-08
Revision:           01
CVE Names:          CVE-2023-39325
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Summary: 
Red Hat OpenShift Container Platform release 4.13.21 is now available with updates to packages and images that fix several bugs.
This release includes a security update for Red Hat OpenShift Container Platform 4.13.
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:
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.
There are no RPM packages for this update.
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.
All OpenShift Container Platform 4.13 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 CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.13/updating/updating-cluster-cli.html
Solution:
https://docs.openshift.com/container-platform/4.13/release_notes/ocp-4-13-release-notes.html
CVEs:
CVE-2023-39325
References:
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2023-003