What it is
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/
- nvd.nist.gov/vuln/detail/CVE-2023-44487
Description and required action as published by CISA. Full record at NVD.