RHSA-2023:6039HighCVSS 7.5

Red Hat Security Advisory: Node Maintenance Operator 5.0.1 security update

Published
October 23, 2023
Last Modified
September 30, 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 products4

  • Node Maintenance Operator 5.0 for RHEL 8
  • workload-availability/node-maintenance-must-gather-rhel8@sha256:21c3c638dc206d3f4a4b0295455e8f26e679a6c30a74746bc1be8d080dcf6883_amd64 as a component of Node Maintenance Operator 5.0 for RHEL 8
  • workload-availability/node-maintenance-operator-bundle@sha256:9fe87e1b0c49dd00a6ab0c35b68ebf641f347ac5b405d31f3c5ace02a7a30540_amd64 as a component of Node Maintenance Operator 5.0 for RHEL 8
  • workload-availability/node-maintenance-rhel8-operator@sha256:6aa1ce70d3d9cc464ae84efce5d0c88a81cdda713a51611be873b550842bde82_amd64 as a component of Node Maintenance Operator 5.0 for RHEL 8

✅ 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)