RHSA-2023:6217HighCVSS 7.5

Red Hat Security Advisory: Red Hat OpenShift Enterprise security update

Published
October 31, 2023
Last Modified
September 22, 2026

🔗 CVE IDs covered (2)

CVE-2023-39325 →CVE-2023-44487 →

📋 Description

CVE-2023-39325 — golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487) CVE-2023-44487 — HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

🎯 Affected products7

  • Red Hat OpenShift Container Platform 4.14
  • openshift4/cnf-tests-rhel8@sha256:dc0a4ce29d0797974b9e2b82761e522c10b1d318db423c08a7d5f7c7a44d09f4_amd64 as a component of Red Hat OpenShift Container Platform 4.14
  • openshift4/dpdk-base-rhel8@sha256:7934f2caf7af7f09ecf808dc86d435e746df74d2de065fdebcd6825f64ccb748_amd64 as a component of Red Hat OpenShift Container Platform 4.14
  • openshift4/noderesourcetopology-scheduler-rhel9@sha256:7824fe71328515ea97d7c539b9f622180e8a51ef63862897819a4a2c4cf16cc7_amd64 as a component of Red Hat OpenShift Container Platform 4.14
  • openshift4/numaresources-must-gather-rhel9@sha256:7a1fd13b308320588ed336490e7136ac6f581d43e09acf9628d4a747f1d6257f_amd64 as a component of Red Hat OpenShift Container Platform 4.14
  • openshift4/numaresources-operator-bundle@sha256:44b1b733592ad126d8e48cfe0230a01552d722505c2a421e3bfe1314dac8d610_amd64 as a component of Red Hat OpenShift Container Platform 4.14
  • openshift4/numaresources-rhel9-operator@sha256:e827220ff2b07b7acbb716f90d3834da84e66523e2ffa4a282e9f28270b73d19_amd64 as a component of Red Hat OpenShift Container Platform 4.14

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Workaround: The default stream concurrency limit in golang is 250 streams (requests) per HTTP/2 connection. This value may be adjusted in the golang.org/x/net/http2 package using the Server.MaxConcurrentStreams setting and the ConfigureServer function which are available in golang.org/x/net/http2. Workaround: Users are strongly urged to update their software as soon as fixes are available. There are several mitigation approaches for this flaw. 1. If circumstances permit, users may disable http2 endpoints to circumvent the flaw altogether until a fix is available. 2. IP-based blocking or flood protection and rate control tools may be used at network endpoints to filter incoming traffic. 3. Several package specific mitigations are also available. a. nginx: https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/ b. netty: https://github.com/netty/netty/security/advisories/GHSA-xpw8-rcwv-8f8p c. haproxy: https://www.haproxy.com/blog/haproxy-is-not-affected-by-the-http-2-rapid-reset-attack-cve-2023-44487 d. nghttp2: https://github.com/nghttp2/nghttp2/security/advisories/GHSA-vx74-f528-fxqg e. golang: The default stream concurrency limit in golang is 250 streams (requests) per HTTP/2 connection. This value may be adjusted in the golang.org/x/net/http2 package using the Server.MaxConcurrentStreams setting and the ConfigureServer function which are available in golang.org/x/net/http2.

🔗 References (6)