RHSA-2023:5971HighCVSS 7.5

Red Hat Security Advisory: Red Hat OpenStack Platform 17.1.1 (director-operator) security update

Published
October 20, 2023
Last Modified
September 22, 2026

🔗 CVE IDs covered (3)

CVE-2023-29409 →CVE-2023-39325 →CVE-2023-44487 →

📋 Description

CVE-2023-29409 — golang: crypto/tls: slow verification of certificate chains containing large RSA keys 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 products5

  • Red Hat OpenStack Platform 17.1
  • rhosp-rhel9/osp-director-agent@sha256:10b51664c656a13faaeb88dbdf8a212006ebcf144b473c3df4366b26716595ca_amd64 as a component of Red Hat OpenStack Platform 17.1
  • rhosp-rhel9/osp-director-downloader@sha256:8f2ce2bf02b1b9c4459abdf4074245715aa38445dccdb103c9d7666bb2986046_amd64 as a component of Red Hat OpenStack Platform 17.1
  • rhosp-rhel9/osp-director-operator-bundle@sha256:ab0228b2f438f9d6684b6ab270988b46c7e66588abf2c323605f0759e52fd27b_amd64 as a component of Red Hat OpenStack Platform 17.1
  • rhosp-rhel9/osp-director-operator@sha256:234d616518185e0cedbc3ba80bcb92f81cfdfa20854387aefa472a87c978bde3_amd64 as a component of Red Hat OpenStack Platform 17.1

✅ 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: 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 (7)