CVE-2023-44487
Last modified
CVE-2023-44487 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 100.00% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
100.0th percentile
Probability of exploitation in the next 30 days. Learn more
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Siemens | Simatic S7-1500 Cpu 1518f-4 Pn\/Dp Mfp Firmware | >= 3.1.5 | — |
| Siemens | Sinec Ins | < 1.0 | — |
| Siemens | Sinec Ins | 1.0 | — |
| Siemens | Sinec Nms | < 3.0 | — |
| Siemens | St7 Scadaconnect | < 1.1 | — |
| Siemens | Ruggedcom Ape1808 Firmware | All versions | — |
| Siemens | Simatic S7-1500 Cpu 1518-4 Pn\/Dp Mfp Firmware | >= 3.1.5 | — |
| Siemens | Siplus S7-1500 Cpu 1518-4 Pn\/Dp Mfp Firmware | >= 3.1.5 | — |
| Ietf | Http | 2.0 | — |
| Nghttp2 | Nghttp2 | < 1.57.0 | — |
| Netty | Netty | < 4.1.100 | — |
| Envoyproxy | Envoy | 1.24.10 | — |
| Envoyproxy | Envoy | 1.25.9 | — |
| Envoyproxy | Envoy | 1.26.4 | — |
| Envoyproxy | Envoy | 1.27.0 | — |
| Eclipse | Jetty | < 9.4.53 | — |
| Eclipse | Jetty | >= 10.0.0, < 10.0.17 | — |
| Eclipse | Jetty | >= 11.0.0, < 11.0.17 | — |
| Eclipse | Jetty | >= 12.0.0, < 12.0.2 | — |
| Caddyserver | Caddy | < 2.7.5 | — |
| Golang | Go | < 1.20.10 | — |
| Golang | Go | >= 1.21.0, < 1.21.3 | — |
| Golang | Http2 | < 0.17.0 | — |
| Golang | Networking | < 0.17.0 | — |
| F5 | Big-Ip Access Policy Manager | >= 13.1.0, <= 13.1.5 | — |
| F5 | Big-Ip Access Policy Manager | >= 14.1.0, <= 14.1.5 | — |
| F5 | Big-Ip Access Policy Manager | >= 15.1.0, <= 15.1.10 | — |
| F5 | Big-Ip Access Policy Manager | >= 16.1.0, <= 16.1.4 | — |
| F5 | Big-Ip Access Policy Manager | 17.1.0 | — |
| F5 | Big-Ip Advanced Firewall Manager | >= 13.1.0, <= 13.1.5 | — |
| F5 | Big-Ip Advanced Firewall Manager | >= 14.1.0, <= 14.1.5 | — |
| F5 | Big-Ip Advanced Firewall Manager | >= 15.1.0, <= 15.1.10 | — |
| F5 | Big-Ip Advanced Firewall Manager | >= 16.1.0, <= 16.1.4 | — |
| F5 | Big-Ip Advanced Firewall Manager | 17.1.0 | — |
| F5 | Big-Ip Advanced Web Application Firewall | >= 13.1.0, <= 13.1.5 | — |
| F5 | Big-Ip Advanced Web Application Firewall | >= 14.1.0, <= 14.1.5 | — |
| F5 | Big-Ip Advanced Web Application Firewall | >= 15.1.0, <= 15.1.10 | — |
| F5 | Big-Ip Advanced Web Application Firewall | >= 16.1.0, <= 16.1.4 | — |
| F5 | Big-Ip Advanced Web Application Firewall | 17.1.0 | — |
| F5 | Big-Ip Analytics | >= 13.1.0, <= 13.1.5 | — |
| F5 | Big-Ip Analytics | >= 14.1.0, <= 14.1.5 | — |
| F5 | Big-Ip Analytics | >= 15.1.0, <= 15.1.10 | — |
| F5 | Big-Ip Analytics | >= 16.1.0, <= 16.1.4 | — |
| F5 | Big-Ip Analytics | 17.1.0 | — |
| F5 | Big-Ip Application Acceleration Manager | >= 13.1.0, <= 13.1.5 | — |
| F5 | Big-Ip Application Acceleration Manager | >= 14.1.0, <= 14.1.5 | — |
| F5 | Big-Ip Application Acceleration Manager | >= 15.1.0, <= 15.1.10 | — |
| F5 | Big-Ip Application Acceleration Manager | >= 16.1.0, <= 16.1.4 | — |
| F5 | Big-Ip Application Acceleration Manager | 17.1.0 | — |
| F5 | Big-Ip Application Security Manager | >= 13.1.0, <= 13.1.5 | — |
Showing 50 of 284 affected configurations. See NVD for the full list.
References
- http://www.openwall.com/lists/oss-security/2023/10/10/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/10/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/9Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/8Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/19/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/20/8Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/cve-2023-44487Vendor Advisory
- https://arstechnica.com/security/2023/10/how-ddosers-used-the-http-2-protocol-to-deliver-attacks-of-unprecedented-size/Press/Media Coverage, Third Party Advisory
- https://aws.amazon.com/security/security-bulletins/AWS-2023-011/Third Party Advisory
- https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/Technical Description, Vendor Advisory
- https://blog.cloudflare.com/zero-day-rapid-reset-http2-record-breaking-ddos-attack/Third Party Advisory, Vendor Advisory
- https://blog.qualys.com/vulnerabilities-threat-research/2023/10/10/cve-2023-44487-http-2-rapid-reset-attackPress/Media Coverage, Third Party Advisory
- https://blog.vespa.ai/cve-2023-44487/Vendor Advisory
- https://bugzilla.proxmox.com/show_bug.cgi?id=4988Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2242803Issue Tracking, Vendor Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1216123Issue Tracking, Vendor Advisory
- https://cgit.freebsd.org/ports/commit/?id=c64c329c2c1752f46b73e3e6ce9f4329be6629f9Mailing List, Patch, Vendor Advisory
- https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/Technical Description, Vendor Advisory
- https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attackTechnical Description, Vendor Advisory
- https://gist.github.com/adulau/7c2bfb8e9cdbe4b35a5e131c66a0c088Issue Tracking, Patch
- https://github.com/Azure/AKS/issues/3947Issue Tracking
- https://github.com/Kong/kong/discussions/11741Issue Tracking
- https://github.com/advisories/GHSA-qppj-fm5r-hxr3Vendor Advisory
- https://github.com/advisories/GHSA-vx74-f528-fxqgMitigation, Patch, Vendor Advisory
- https://github.com/advisories/GHSA-xpw8-rcwv-8f8pPatch, Vendor Advisory
- https://github.com/akka/akka-http/issues/4323Issue Tracking
- https://github.com/alibaba/tengine/issues/1872Issue Tracking
- https://github.com/apache/apisix/issues/10320Issue Tracking
- https://github.com/apache/httpd-site/pull/10Issue Tracking
- https://github.com/apache/tomcat/tree/main/java/org/apache/coyote/http2Product, Third Party Advisory
- https://github.com/apache/trafficserver/pull/10564Issue Tracking, Patch
- https://github.com/arkrwn/PoC/tree/main/CVE-2023-44487Vendor Advisory
- https://github.com/bcdannyboy/CVE-2023-44487Third Party Advisory
- https://github.com/caddyserver/caddy/issues/5877Issue Tracking, Vendor Advisory
- https://github.com/caddyserver/caddy/releases/tag/v2.7.5Release Notes, Third Party Advisory
- https://github.com/dotnet/announcements/issues/277Issue Tracking, Mitigation, Vendor Advisory
- https://github.com/eclipse/jetty.project/issues/10679Issue Tracking
- https://github.com/envoyproxy/envoy/pull/30055Issue Tracking, Patch
- https://github.com/etcd-io/etcd/issues/16740Issue Tracking, Patch
- https://github.com/facebook/proxygen/pull/466Issue Tracking, Patch
- https://github.com/golang/go/issues/63417Issue Tracking
- https://github.com/grpc/grpc-go/pull/6703Issue Tracking, Patch
- https://github.com/h2o/h2o/pull/3291Issue Tracking, Patch
- https://github.com/haproxy/haproxy/issues/2312Issue Tracking
- https://github.com/junkurihara/rust-rpxy/issues/97Issue Tracking
- https://github.com/kazu-yamamoto/http2/issues/93Issue Tracking
- https://github.com/kubernetes/kubernetes/pull/121120Issue Tracking, Patch
- https://github.com/line/armeria/pull/5232Issue Tracking, Patch
- https://github.com/micrictor/http2-rst-streamExploit, Third Party Advisory
- https://github.com/microsoft/CBL-Mariner/pull/6381Issue Tracking, Patch
- https://github.com/nghttp2/nghttp2/pull/1961Issue Tracking, Patch
- https://github.com/ninenines/cowboy/issues/1615Issue Tracking
- https://github.com/nodejs/node/pull/50121Issue Tracking
- https://github.com/openresty/openresty/issues/930Issue Tracking
- https://github.com/opensearch-project/data-prepper/issues/3474Issue Tracking, Patch
- https://github.com/projectcontour/contour/pull/5826Issue Tracking, Patch
- https://github.com/tempesta-tech/tempesta/issues/1986Issue Tracking
- https://groups.google.com/g/golang-announce/c/iNNxDTCjZvoMailing List, Release Notes, Vendor Advisory
- https://linkerd.io/2023/10/12/linkerd-cve-2023-44487/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00020.htmlMailing List, Third Party Advisory
- https://lists.w3.org/Archives/Public/ietf-http-wg/2023OctDec/0025.htmlMailing List, Third Party Advisory
- https://mailman.nginx.org/pipermail/nginx-devel/2023-October/S36Q5HBXR7CAIMPLLPRSSSYR4PCMWILK.htmlMailing List, Patch, Third Party Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-44487Mitigation, Patch, Vendor Advisory
- https://my.f5.com/manage/s/article/K000137106Vendor Advisory
- https://netty.io/news/2023/10/10/4-1-100-Final.htmlRelease Notes, Vendor Advisory
- https://news.ycombinator.com/item?id=37830987Issue Tracking
- https://news.ycombinator.com/item?id=37830998Issue Tracking, Press/Media Coverage
- https://news.ycombinator.com/item?id=37831062Issue Tracking
- https://news.ycombinator.com/item?id=37837043Issue Tracking
- https://security.gentoo.org/glsa/202311-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20231016-0001/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240426-0007/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240621-0006/Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240621-0007/Third Party Advisory
- https://security.paloaltonetworks.com/CVE-2023-44487Vendor Advisory
- https://ubuntu.com/security/CVE-2023-44487Vendor Advisory
- https://www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487Third Party Advisory, US Government Resource
- https://www.darkreading.com/cloud/internet-wide-zero-day-bug-fuels-largest-ever-ddos-eventPress/Media Coverage, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5521Mailing List, Vendor Advisory
- https://www.debian.org/security/2023/dsa-5522Mailing List, Vendor Advisory
- https://www.debian.org/security/2023/dsa-5540Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5549Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5558Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5570Third Party Advisory
- https://www.haproxy.com/blog/haproxy-is-not-affected-by-the-http-2-rapid-reset-attack-cve-2023-44487Third Party Advisory, Vendor Advisory
- https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/Mitigation, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2023/10/10/6Mailing List, Third Party Advisory
- https://www.phoronix.com/news/HTTP2-Rapid-Reset-AttackPress/Media Coverage
- https://www.theregister.com/2023/10/10/http2_rapid_reset_zeroday/Press/Media Coverage, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/13/9Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/18/8Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/19/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/20/8Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2025/08/13/6Third Party Advisory
- https://access.redhat.com/security/cve/cve-2023-44487Vendor Advisory
- https://arstechnica.com/security/2023/10/how-ddosers-used-the-http-2-protocol-to-deliver-attacks-of-unprecedented-size/Press/Media Coverage, Third Party Advisory
- https://aws.amazon.com/security/security-bulletins/AWS-2023-011/Third Party Advisory
- https://blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/Technical Description, Vendor Advisory
- https://blog.cloudflare.com/zero-day-rapid-reset-http2-record-breaking-ddos-attack/Third Party Advisory, Vendor Advisory
- https://blog.qualys.com/vulnerabilities-threat-research/2023/10/10/cve-2023-44487-http-2-rapid-reset-attackPress/Media Coverage, Third Party Advisory
- https://blog.vespa.ai/cve-2023-44487/Vendor Advisory
- https://bugzilla.proxmox.com/show_bug.cgi?id=4988Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2242803Issue Tracking, Vendor Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1216123Issue Tracking, Vendor Advisory
- https://cgit.freebsd.org/ports/commit/?id=c64c329c2c1752f46b73e3e6ce9f4329be6629f9Mailing List, Patch, Vendor Advisory
- https://cloud.google.com/blog/products/identity-security/google-cloud-mitigated-largest-ddos-attack-peaking-above-398-million-rps/Technical Description, Vendor Advisory
- https://cloud.google.com/blog/products/identity-security/how-it-works-the-novel-http2-rapid-reset-ddos-attackTechnical Description, Vendor Advisory
- https://gist.github.com/adulau/7c2bfb8e9cdbe4b35a5e131c66a0c088Issue Tracking, Patch
- https://github.com/Azure/AKS/issues/3947Issue Tracking
- https://github.com/Kong/kong/discussions/11741Issue Tracking
- https://github.com/advisories/GHSA-qppj-fm5r-hxr3Vendor Advisory
- https://github.com/advisories/GHSA-vx74-f528-fxqgMitigation, Patch, Vendor Advisory
- https://github.com/advisories/GHSA-xpw8-rcwv-8f8pPatch, Vendor Advisory
- https://github.com/akka/akka-http/issues/4323Issue Tracking
- https://github.com/alibaba/tengine/issues/1872Issue Tracking
- https://github.com/apache/apisix/issues/10320Issue Tracking
- https://github.com/apache/httpd-site/pull/10Issue Tracking
- https://github.com/apache/tomcat/tree/main/java/org/apache/coyote/http2Product, Third Party Advisory
- https://github.com/apache/trafficserver/pull/10564Issue Tracking, Patch
- https://github.com/arkrwn/PoC/tree/main/CVE-2023-44487Vendor Advisory
- https://github.com/bcdannyboy/CVE-2023-44487Third Party Advisory
- https://github.com/caddyserver/caddy/issues/5877Issue Tracking, Vendor Advisory
- https://github.com/caddyserver/caddy/releases/tag/v2.7.5Release Notes, Third Party Advisory
- https://github.com/dotnet/announcements/issues/277Issue Tracking, Mitigation, Vendor Advisory
- https://github.com/eclipse/jetty.project/issues/10679Issue Tracking
- https://github.com/envoyproxy/envoy/pull/30055Issue Tracking, Patch
- https://github.com/etcd-io/etcd/issues/16740Issue Tracking, Patch
- https://github.com/facebook/proxygen/pull/466Issue Tracking, Patch
- https://github.com/golang/go/issues/63417Issue Tracking
- https://github.com/grpc/grpc-go/pull/6703Issue Tracking, Patch
- https://github.com/h2o/h2o/pull/3291Issue Tracking, Patch
- https://github.com/haproxy/haproxy/issues/2312Issue Tracking
- https://github.com/junkurihara/rust-rpxy/issues/97Issue Tracking
- https://github.com/kazu-yamamoto/http2/issues/93Issue Tracking
- https://github.com/kubernetes/kubernetes/pull/121120Issue Tracking, Patch
- https://github.com/line/armeria/pull/5232Issue Tracking, Patch
- https://github.com/micrictor/http2-rst-streamExploit, Third Party Advisory
- https://github.com/microsoft/CBL-Mariner/pull/6381Issue Tracking, Patch
- https://github.com/nghttp2/nghttp2/pull/1961Issue Tracking, Patch
- https://github.com/ninenines/cowboy/issues/1615Issue Tracking
- https://github.com/nodejs/node/pull/50121Issue Tracking
- https://github.com/openresty/openresty/issues/930Issue Tracking
- https://github.com/opensearch-project/data-prepper/issues/3474Issue Tracking, Patch
- https://github.com/projectcontour/contour/pull/5826Issue Tracking, Patch
- https://github.com/tempesta-tech/tempesta/issues/1986Issue Tracking
- https://groups.google.com/g/golang-announce/c/iNNxDTCjZvoMailing List, Release Notes, Vendor Advisory
- https://linkerd.io/2023/10/12/linkerd-cve-2023-44487/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00020.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLU6U2R2IC2K64NDPNMV55AUAO65MAF4/Mailing List, Third Party Advisory
- https://lists.w3.org/Archives/Public/ietf-http-wg/2023OctDec/0025.htmlMailing List, Third Party Advisory
- https://mailman.nginx.org/pipermail/nginx-devel/2023-October/S36Q5HBXR7CAIMPLLPRSSSYR4PCMWILK.htmlMailing List, Patch, Third Party Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-44487Mitigation, Patch, Vendor Advisory
- https://my.f5.com/manage/s/article/K000137106Vendor Advisory
- https://netty.io/news/2023/10/10/4-1-100-Final.htmlRelease Notes, Vendor Advisory
- https://news.ycombinator.com/item?id=37830987Issue Tracking
- https://news.ycombinator.com/item?id=37830998Issue Tracking, Press/Media Coverage
- https://news.ycombinator.com/item?id=37831062Issue Tracking
- https://news.ycombinator.com/item?id=37837043Issue Tracking
- https://security.gentoo.org/glsa/202311-09Third Party Advisory
- https://security.netapp.com/advisory/ntap-20231016-0001/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240426-0007/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240621-0006/Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240621-0007/Third Party Advisory
- https://security.paloaltonetworks.com/CVE-2023-44487Vendor Advisory
- https://ubuntu.com/security/CVE-2023-44487Vendor Advisory
- https://www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487Third Party Advisory, US Government Resource
- https://www.darkreading.com/cloud/internet-wide-zero-day-bug-fuels-largest-ever-ddos-eventPress/Media Coverage, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5521Mailing List, Vendor Advisory
- https://www.debian.org/security/2023/dsa-5522Mailing List, Vendor Advisory
- https://www.debian.org/security/2023/dsa-5540Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5549Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5558Mailing List, Third Party Advisory
- https://www.debian.org/security/2023/dsa-5570Third Party Advisory
- https://www.haproxy.com/blog/haproxy-is-not-affected-by-the-http-2-rapid-reset-attack-cve-2023-44487Third Party Advisory, Vendor Advisory
- https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/Mitigation, Vendor Advisory
- https://www.openwall.com/lists/oss-security/2023/10/10/6Mailing List, Third Party Advisory
- https://www.phoronix.com/news/HTTP2-Rapid-Reset-AttackPress/Media Coverage
- https://www.theregister.com/2023/10/10/http2_rapid_reset_zeroday/Press/Media Coverage, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-341067.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-784301.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-832273.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-915275.htmlThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-44487US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2023-44487?
How severe is CVE-2023-44487?
How do I fix CVE-2023-44487?
Are you affected by CVE-2023-44487?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST
