Headline
GHSA-4374-p667-p6c8: HTTP/2 rapid reset can cause excessive work in net/http
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing.
With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection.
This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2.
The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2023-39325
HTTP/2 rapid reset can cause excessive work in net/http
Moderate severity GitHub Reviewed Published Oct 11, 2023 to the GitHub Advisory Database • Updated Oct 11, 2023
Package
gomod golang.org/x/net (Go)
Affected versions
< 0.17.0
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing.
With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection.
This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2.
The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
References
- golang/go#63417
- https://go.dev/cl/534215
- https://go.dev/cl/534235
- https://go.dev/issue/63417
- https://groups.google.com/g/golang-announce/c/iNNxDTCjZvo/m/UDd7VKQuAAAJ
Published to the GitHub Advisory Database
Oct 11, 2023
Last updated
Oct 11, 2023
Related news
Red Hat Security Advisory 2024-3467-03 - An update for etcd is now available for Red Hat OpenStack Platform 16.1 on Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2024-0269-03 - An update for run-once-duration-override-container, run-once-duration-override-operator-bundle-container, and run-once-duration-override-operator-container is now available for RODOO-1.1-RHEL-9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2024-0485-03 - Red Hat OpenShift Container Platform release 4.12.48 is now available with updates to packages and images that fix several bugs and add enhancements. Issues addressed include a cross site scripting vulnerability.
Red Hat Security Advisory 2024-0050-03 - Red Hat OpenShift Container Platform release 4.14.8 is now available with updates to packages and images that fix several bugs and add enhancements. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-7704-03 - Red Hat OpenShift Virtualization release 4.14.1 is now available with updates to packages and images that fix several bugs and add enhancements. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-7662-03 - An update for windows-machine-config-operator-bundle-container and windows-machine-config-operator-container is now available for Red Hat OpenShift Container Platform 4.11. Issues addressed include a privilege escalation vulnerability.
Red Hat Security Advisory 2023-7555-01 - OpenShift API for Data Protection 1.3.0 is now available. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-7344-01 - An update for openshift-gitops-kam is now available for Red Hat OpenShift GitOps 1.9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-7288-01 - An update for Openshift Jenkins is now available for Red Hat Product OCP Tools 4.14. Issues addressed include bypass, code execution, cross site scripting, and denial of service vulnerabilities.
Red Hat Security Advisory 2023-6243-01 - An update for openshift-gitops-kam is now available for Red Hat OpenShift GitOps 1.10.
Red Hat Security Advisory 2023-6202-01 - Red Hat Advanced Cluster Management for Kubernetes 2.6.8 General Availability release images, which provide security updates and fix bugs. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-6161-01 - The Migration Toolkit for Containers 1.7.14 is now available. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-6085-01 - An update is now available for Red Hat Openshift distributed tracing 2.9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-6084-01 - Updated images are now available for Red Hat Advanced Cluster Security. The updated image includes new features and bug fixes. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-6077-01 - An updated rhel9/toolbox container image is now available in the Red Hat container registry.
Red Hat Security Advisory 2023-6057-01 - An update for toolbox is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5982-01 - An update for foreman_ygg_worker, puppet-agent, qpid-proton, and yggdrasil is now available for Satellite Client 6 for RHEL 6, Satellite Client 6 for RHEL 7, Satellite Client 6 for RHEL 8, and Satellite Client 6 for RHEL 9. Issues addressed include code execution and denial of service vulnerabilities.
Red Hat Security Advisory 2023-5979-01 - Updated Satellite 6.12 packages that fixes important security bugs and several regular bugs are now available for Red Hat Satellite. Issues addressed include a code execution vulnerability.
Red Hat Security Advisory 2023-5976-01 - An update is now available for Service Telemetry Framework 1.5.2. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5971-01 - An update for osp-director-agent-container, osp-director-downloader-container, osp-director-operator-bundle-container, and osp-director-operator-container is now available for Red Hat OpenStack Platform 17.1.1. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5970-01 - An update for collectd-libpod-stats is now available for Red Hat OpenStack Platform 17.1.1. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5965-01 - An update for collectd-libpod-stats and etcd is now available for Red Hat OpenStack Platform 16.2.5. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5952-01 - An update is now available for Red Hat OpenShift Service Mesh 2.4 for RHEL 8.
Red Hat Security Advisory 2023-5951-01 - An update is now available for Red Hat OpenShift Service Mesh 2.3 for RHEL 8.
Red Hat Security Advisory 2023-5935-01 - An update for osp-director-agent-container, osp-director-downloader-container, osp-director-operator-bundle-container, and osp-director-operator-container is now available for Red Hat OpenStack Platform 16.2.5. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5931-01 - Updated Satellite 6.13 packages that fixes Important security bugs and several regular bugs are now available for Red Hat Satellite. Issues addressed include code execution and denial of service vulnerabilities.
Red Hat Security Advisory 2023-5867-01 - An update for grafana is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5866-01 - An update for grafana is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5865-01 - An update for grafana is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5864-01 - An update for grafana is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5863-01 - An update for grafana is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5835-01 - The rhc-worker-script packages provide Remote Host Configuration worker for executing an interpreted programming language script on hosts managed by Red Hat Insights. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5810-01 - Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to individual teams, while automation developers retain the freedom to write tasks that leverage existing knowledge without the overhead. Ansible Automation Platform makes it possible for users across an organization to share, vet, and manage automation content by means of a simple, powerful, and agentless language.
Red Hat Security Advisory 2023-5809-01 - Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to individual teams, while automation developers retain the freedom to write tasks that leverage existing knowledge without the overhead. Ansible Automation Platform makes it possible for users across an organization to share, vet, and manage automation content by means of a simple, powerful, and agentless language.
Red Hat Security Advisory 2023-5805-01 - Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to individual teams, while automation developers retain the freedom to write tasks that leverage existing knowledge without the overhead. Ansible Automation Platform makes it possible for users across an organization to share, vet, and manage automation content by means of a simple, powerful, and agentless language. Issues addressed include a denial of service vulnerability.
Red Hat Security Advisory 2023-5679-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.12.39. Issues addressed include a denial of service vulnerability.
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see ...