CVE-2023-44487 · netVigilance record NV23-0152
HTTP/2 Rapid Reset Attack
past due
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.
CISA deadline 2023-10-31 · passed 2 years 10 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
Who is affected
IETF HTTP/2. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-400.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 2 years 10 months ago
Sources
- NVD entry for CVE-2023-44487 nvd.nist.gov/vuln/detail/CVE-2023-44487
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- cisa.gov www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487
- blog.cloudflare.com blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2023-44487