CVE-2023-44487
· published 2023-10-10
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2023-10-10).
- CISA's name for it: HTTP/2 Rapid Reset Attack Vulnerability
- CISA's description: HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
- Known ransomware campaign use, per CISA: Unknown
Source: CISA KEV catalog (CC0 1.0).
Description
Description by MITRE via the CVE Program.
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a: affected |
Added by CISA-ADP (Authorized Data Publisher)
| Vendor | Product | Versions |
|---|---|---|
| ietf | http | 2.0: affected |
Added by siemens-SADP (Authorized Data Publisher)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | RUGGEDCOM APE1808 | 0 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SINEC NMS | 0 – before V3.0: affected |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
Products named in NVD's CPE match criteria (50)
cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:st7_scadaconnect:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:ietf:http:2.0:*:*:*:*:*:*:*cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*cpe:2.3:a:envoyproxy:envoy:1.24.10:*:*:*:*:*:*:*cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*cpe:2.3:a:golang:http2:*:*:*:*:*:go:*:*cpe:2.3:a:golang:networking:*:*:*:*:*:go:*:*cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_application_visibility_and_reporting:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_next:20.0.1:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_next_service_proxy_for_kubernetes:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*cpe:2.3:a:apple:swiftnio_http\/2:*:*:*:*:*:swift:*:*cpe:2.3:a:grpc:grpc:*:*:*:*:*:go:*:*cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*cpe:2.3:a:microsoft:azure_kubernetes_service:*:*:*:*:*:*:*:*cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 7.5 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1: 7.5 HIGH — as published by CISA-ADP (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: yes · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
NVD-CWE-noinfo, CWE-400
Sources
References the source lists
- http://www.openwall.com/lists/oss-security/2023/10/10/6
- http://www.openwall.com/lists/oss-security/2023/10/10/7
- http://www.openwall.com/lists/oss-security/2023/10/13/4
- http://www.openwall.com/lists/oss-security/2023/10/13/9
- http://www.openwall.com/lists/oss-security/2023/10/18/4
- http://www.openwall.com/lists/oss-security/2023/10/18/8
- http://www.openwall.com/lists/oss-security/2023/10/19/6
- http://www.openwall.com/lists/oss-security/2023/10/20/8
- https://access.redhat.com/security/cve/cve-2023-44487
- https://arstechnica.com/security/2023/10/how-ddosers-used-the-http-2-protocol-to-deliver-attacks-of-unprecedented-size/
- https://aws.amazon.com/security/security-bulletins/AWS-2023-011/
- https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/
- https://blog.cloudflare.com/zero-day-rapid-reset-http2-record-breaking-ddos-attack/
- https://blog.litespeedtech.com/2023/10/11/rapid-reset-http-2-vulnerablilty/
- https://blog.qualys.com/vulnerabilities-threat-research/2023/10/10/cve-2023-44487-http-2-rapid-reset-attack
- https://blog.vespa.ai/cve-2023-44487/
- https://bugzilla.proxmox.com/show_bug.cgi?id=4988
- https://bugzilla.redhat.com/show_bug.cgi?id=2242803
- https://bugzilla.suse.com/show_bug.cgi?id=1216123
- https://cgit.freebsd.org/ports/commit/?id=c64c329c2c1752f46b73e3e6ce9f4329be6629f9
- https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/
- https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attack
- https://community.traefik.io/t/is-traefik-vulnerable-to-cve-2023-44487/20125
- https://discuss.hashicorp.com/t/hcsec-2023-32-vault-consul-and-boundary-affected-by-http-2-rapid-reset-denial-of-service-vulnerability-cve-2023-44487/59715
- https://edg.io/lp/blog/resets-leaks-ddos-and-the-tale-of-a-hidden-cve
- https://forums.swift.org/t/swift-nio-http2-security-update-cve-2023-44487-http-2-dos/67764
- https://gist.github.com/adulau/7c2bfb8e9cdbe4b35a5e131c66a0c088
- https://github.com/Azure/AKS/issues/3947
- https://github.com/Kong/kong/discussions/11741
- https://github.com/advisories/GHSA-qppj-fm5r-hxr3
The source lists more references.
Source dates: published 2023-10-10, last changed 2026-08-11. DeSpy's copy of this version is dated 2026-09-28.
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