RHSA-2023:7218HighCVSS 7.5

Red Hat Security Advisory: Kernel Module Management security update

Published
November 15, 2023
Last Modified
July 30, 2026

🔗 CVE IDs covered (1)

CVE-2023-44487 →

📋 Description

CVE-2023-44487 — HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

🎯 Affected products19

  • kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-operator-bundle@sha256:4b9879b5a7d6003b0c9586a11c2062a78794a6f92fe9ecc14da80e04149a62f8_arm64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-operator-bundle@sha256:7a2bbedd258140f7767e206523d21fdf407ec5596f10ad3c0936c92863939313_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-operator-bundle@sha256:b8b8d224ada7a865ddf79b36b493c3fc93f6b89f03dcb5bf6329ae2f538002aa_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-rhel9-operator@sha256:6793da0209a2427a3280287c514e0f6c1f4927e65fd2079d7b1528b1d074cba6_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-rhel9-operator@sha256:cb0727de29d42ac9c79bf51474b72fb55f04fdc2a05876e944443669750f5ee6_arm64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-hub-rhel9-operator@sha256:ecc37b90a477748766aa11784966f695b83e6e1a2d4eca48fd9167f920c33615_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-must-gather-rhel9@sha256:0c17aa8140a586ec4271f10f252e65a380f25cc73d79a3ab20e37b4cf5b0f51c_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-must-gather-rhel9@sha256:45c6a0a49602a2866490ae59036b5a585d243cdc7e802055b34eb2e8ebbbc98d_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-must-gather-rhel9@sha256:f9cec2eac1dbd3d19ce6e9d7d7c654f8eba96882dc3a5df9ad5b8cbd02e88bb9_arm64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-operator-bundle@sha256:6e3792f846dd8f3b3a2117b46b8abcfe85ad5118eac0acf83bb007390d12fd05_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-operator-bundle@sha256:c1fbd5600ce0eaa118012e9d7a0a3e7b4d75b5c78b369f6cb3525aee7eae93a7_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-operator-bundle@sha256:e0aa6130e69dd838e31a9a8800ed518c00c73f67a24a4bcf0d572c757d68b5ee_arm64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-rhel9-operator@sha256:0964ed8ca8a915f0f2b3ac4cc8aa7d885e541595a9ed959a18fffc771f591716_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-rhel9-operator@sha256:b2c25eb3dff374616b87f57caec0215af803b725b1f01784de808ee4d23068c8_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-rhel9-operator@sha256:c0062d91d15628ccc35133b67bcedb82076ed22b5c180fdfbae360c8e25e8a47_arm64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-signing-rhel9@sha256:3feee1b84375b7e5e936bab7d4d2340be0452bbfda959e5d1aec520f0f606887_ppc64le as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-signing-rhel9@sha256:8f7e525974f388a0c33e227e9cd283b16edcf085819f89a37e41f27a872fa832_amd64 as a component of kmm 1.1 for RHEL 9
  • kmm/kernel-module-management-signing-rhel9@sha256:fe37c0a672e97518b01abf7b998d50dd79e47bcd7e1d60950d64b812a599f8cd_arm64 as a component of kmm 1.1 for RHEL 9

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 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 (5)