CVE-2023-44487: CVE-2023-44487 - HTTP/2 Rapid Reset Attack

Red Hat Security Advisory 2024-4631-03 - Red Hat OpenShift Dev Spaces 3.15 has been released.

Red Hat Security Advisory 2024-2633-03 - Updated container image for Red Hat Ceph Storage 6.1 is now available in the Red Hat Ecosystem Catalog.

Red Hat Security Advisory 2024-0837-03 - Red Hat OpenShift Container Platform release 4.14.13 is now available with updates to packages and images that fix several bugs and add enhancements.

Red Hat Security Advisory 2024-0273-03 - Red Hat OpenShift Virtualization release 4.12.9 is now available with updates to packages and images that fix several bugs and add enhancements.

Red Hat Security Advisory 2023-7608-03 - Red Hat OpenShift Container Platform release 4.12.45 is now available with updates to packages and images that fix several bugs and add enhancements.

Red Hat Security Advisory 2023-7481-01 - Red Hat OpenShift Container Platform release 4.11.54 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 2023-7288-01 - 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 2023-6233-01 - Red Hat OpenShift Container Platform low-latency extras release 4.12, which provides an update for cnf-tests-container, performance-addon-operator-must-gather-rhel8-container, NUMA-aware secondary scheduler and numaresources-operator, is now available. Issues addressed include a denial of service vulnerability.

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 2023-6105-01 - An update is now available for Red Hat JBoss Core Services. 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 2023-6057-01 - 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 2023-5978-01 - JBoss EAP XP 4.0.0.GA security release on the EAP 7.4.13 base is now available. See references for release notes. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5715-01 - An update for the nginx:1.20 module is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5712-01 - An update for the nginx:1.20 module is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.

Ubuntu Security Notice 6427-2 - USN-6427-1 fixed a vulnerability in .NET. This update provides the corresponding update for .NET 8. It was discovered that the .NET Kestrel web server did not properly handle HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service.

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 2023-5864-01 - 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 2023-5841-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5840-01 - Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. 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 2023-5803-01 - Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5802-01 - Migration Toolkit for Runtimes 1.2.1 ZIP artifacts. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5706-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23. Issues addressed include a denial of service vulnerability.

Debian Linux Security Advisory 5522-3 - A regression was discovered in the Http2UpgradeHandler class of Tomcat 9 introduced by the patch to fix CVE-2023-44487 (Rapid Reset Attack). A wrong value for the overheadcount variable forced HTTP2 connections to close early.

Red Hat Security Advisory 2023-5770-01 - nghttp2 contains the Hypertext Transfer Protocol version 2 client, server, and proxy programs as well as a library implementing the HTTP/2 protocol in C. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5768-01 - nghttp2 contains the Hypertext Transfer Protocol version 2 client, server, and proxy programs as well as a library implementing the HTTP/2 protocol in C. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5765-01 - Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5714-01 - nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5713-01 - nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5708-01 - .NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation. New versions of .NET that address a security vulnerability are now available. The updated versions are .NET 6.0 to SDK 6.0.123 and Runtime 6.0.23. Issues addressed include a denial of service vulnerability.

Debian Linux Security Advisory 5522-2 - The patch to address CVE-2023-44487 (Rapid Reset Attack) was incomplete and caused a regression when using asynchronous I/O (the default for NIO and NIO2). DATA frames must be included when calculating the HTTP/2 overhead count to ensure that connections are not prematurely terminated.

Plus, many of the world’s largest cloud providers are warning of a vulnerability that attackers exploited in August to launch the largest distributed denial-of-service attack on record.

Cisco Talos is actively tracking the novel distributed denial-of-service (DDoS) attacks cloud services provider Cloudflare disclosed earlier this week. The techniques described in Cloudflare’s blog post resulted in a record-breaking DDoS attack and could facilitate much larger attacks in the future.  CVE-2023-44487 CVE-2023-44487, a vulnerability in the

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 ...

Debian Linux Security Advisory 5522-1 - Several security vulnerabilities have been discovered in the Tomcat servlet and JSP engine.

By Deeba Ahmed Google, Cloudflare, and AWS Disclosed Digital History’s Largest Ever DDoS Attack- Courtesy HTTP/2 Zero-day. This is a post from HackRead.com Read the original post: Google, Cloudflare, and AWS Disclose Largest DDoS Attack in History

Microsoft has released its Patch Tuesday updates for October 2023, addressing a total of 103 flaws in its software, two of which have come under active exploitation in the wild. Of the 103 flaws, 13 are rated Critical and 90 are rated Important in severity. This is apart from 18 security vulnerabilities addressed in its Chromium-based Edge browser since the second Tuesday of September. The two

Microsoft today issued security updates for more than 100 newly-discovered vulnerabilities in its Windows operating system and related software, including four flaws that are already being exploited. In addition, Apple recently released emergency updates to quash a pair of zero-day bugs in iOS.

swift-nio-http2 is vulnerable to a denial-of-service vulnerability in which a malicious client can create and then reset a large number of HTTP/2 streams in a short period of time. This causes swift-nio-http2 to commit to a large amount of expensive work which it then throws away, including creating entirely new `Channel`s to serve the traffic. This can easily overwhelm an `EventLoop` and prevent it from making forward progress. swift-nio-http2 1.28 contains a remediation for this issue that applies reset counter using a sliding window. This constrains the number of stream resets that may occur in a given window of time. Clients violating this limit will have their connections torn down. This allows clients to continue to cancel streams for legitimate reasons, while constraining malicious actors.

Amazon Web Services (AWS), Cloudflare, and Google on Tuesday said they took steps to mitigate record-breaking distributed denial-of-service (DDoS) attacks that relied on a novel technique called HTTP/2 Rapid Reset. The layer 7 attacks were detected in late August 2023, the companies said in a coordinated disclosure. The cumulative susceptibility to this attack is being tracked as CVE-2023-44487,

Summary Summary Beginning in September 2023, Microsoft was notified by industry partners about a newly identified Distributed Denial-of-Service (DDoS) attack technique being used in the wild targeting HTTP/2 protocol. This vulnerability (CVE-2023-44487) impacts any internet exposed HTTP/2 endpoints. As an industry leader, Microsoft promptly opened an investigation and subsequently began working with industry partners for a coordinated disclosure and mitigation plan.