HTTP/2 Rapid Reset Attack Affecting Cisco Products: October 2023

On October 10, 2023, the following HTTP/2 protocol-level weakness, which enables a novel distributed denial of service (DDoS) attack technique, was disclosed:

CVE-2023-44487: HTTP/2 Rapid Reset

For a description of this vulnerability, see the following publications:

How it works: The novel HTTP/2 ‘Rapid Reset’ DDoS attack (Google)
HTTP/2 Zero-Day vulnerability results in record-breaking DDoS attacks (Cloudflare)
CVE-2023-44487 – HTTP/2 Rapid Reset Attack (AWS)

This advisory will be updated as additional information becomes available.

This advisory is available at the following link:

Security Impact Rating: High

CVE: CVE-2023-44487

Source:: Cisco Security Advisories