RHSA-2024:0302HighCVSS 7.5

Red Hat Security Advisory: Kube Descheduler Operator for Red Hat OpenShift 5.0.0 for RHEL 9:security update

Published
March 6, 2024
Last Modified
September 22, 2026

🔗 CVE IDs covered (2)

CVE-2023-44487 →CVE-2023-39325 →

📋 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 products10

  • KDO 5.0 for RHEL 9
  • kube-descheduler-operator/descheduler-rhel9@sha256:5d214d8b4827026bb783695f84175b5bd4b1c742b7003174e503cda258bcf0ec_s390x as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/descheduler-rhel9@sha256:d6d747caebc5dc1bafe605c8790f0520c2bca6220c04b1660d44b3f44e5b67ce_amd64 as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/descheduler-rhel9@sha256:e5734b5dcb0d09412dada260881b6dca9b6c60d52666808ecdf71b86610b89bc_ppc64le as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/descheduler-rhel9@sha256:fae36bd3f00aa63a91e80723a656711f377f3bf654fa90189826dc060ac24656_arm64 as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/kube-descheduler-operator-bundle@sha256:ebcc836c3052bebfe7747c18b57ccc3a2870b5907e5ead894d87c8b2e33a12d9_amd64 as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/kube-descheduler-rhel9-operator@sha256:8a2f111ca16eae0fc2cd8a99261572e0693d3d062f67ec15b8e1006e30ba6bd3_ppc64le as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/kube-descheduler-rhel9-operator@sha256:9ef3e097672d5d7ded62974a66477cecb04112ad541e3baeb94f6519eb5076a0_amd64 as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/kube-descheduler-rhel9-operator@sha256:a08ab5ee072a334a4e1d730039ddac532d1da6ed30cb33e0a0c479005c5925e9_s390x as a component of KDO 5.0 for RHEL 9
  • kube-descheduler-operator/kube-descheduler-rhel9-operator@sha256:f22837b5a75ed8c7295440140f986b30cb951fce3b268bdac4defec28b663206_arm64 as a component of KDO 5.0 for RHEL 9

✅ 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 (12)