Red Hat Security Advisory 2023-5708-01

Ubuntu Security Notice 6754-1 - It was discovered that nghttp2 incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to cause nghttp2 to consume resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that nghttp2 incorrectly handled request cancellation. A remote attacker could possibly use this issue to cause nghttp2 to consume resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Red Hat Security Advisory 2024-0777-03 - An update for jenkins and jenkins-2-plugins is now available for OpenShift Developer Tools and Services for OCP 4.14. Issues addressed include bypass, code execution, cross site request forgery, cross site scripting, denial of service, information leakage, and open redirection vulnerabilities.

Ubuntu Security Notice 6574-1 - Takeshi Kaneko discovered that Go did not properly handle comments and special tags in the script context of html/template module. An attacker could possibly use this issue to inject Javascript code and perform a cross site scripting attack. This issue only affected Go 1.20 in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 23.04. It was discovered that Go did not properly validate the "//go:cgo_" directives during compilation. An attacker could possibly use this issue to inject arbitrary code during compile time.

Red Hat Security Advisory 2023-7625-03 - An update is now available for Red Hat JBoss Core Services. Issues addressed include buffer overflow, denial of service, and information leakage vulnerabilities.

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 2023-7522-01 - Red Hat OpenShift Virtualization release 4.13.6 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 2023-7344-01 - 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 2023-6235-01 - Red Hat OpenShift Virtualization release 4.13.5 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 2023-6154-01 - Secondary Scheduler Operator for Red Hat OpenShift 1.2.0. Issues addressed include a denial of service vulnerability.

A privilege escalation flaw was found in the node restriction admission plugin of the kubernetes api server of OpenShift. A remote attacker who modifies the node role label could steer workloads from the control plane and etcd nodes onto different worker nodes and gain broader access to the cluster.

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 2023-5896-01 - Red Hat OpenShift Container Platform release 4.12.40 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 2023-6061-01 - Red Hat OpenShift Pipelines 1.12.1 has been released. Issues addressed include a denial of service vulnerability.

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 2023-5974-01 - An update for network-observability-console-plugin-container, network-observability-ebpf-agent-container, network-observability-flowlogs-pipeline-container, network-observability-operator-bundle-container, and network-observability-operator-container is now available for NETWORK-OBSERVABILITY-1.4.0-RHEL-9. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5973-01 - Red Hat AMQ Streams 2.5.1 is now available from the Red Hat Customer Portal. 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 2023-5869-01 - An update for the nodejs:18 module is now available for Red Hat Enterprise Linux 8. 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 2023-5838-01 - libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 protocol in C. 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 2023-5805-01 - 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 2023-5707-01 - .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.

Red Hat Security Advisory 2023-5780-01 - A security update for Camel Extensions for Quarkus 2.13.3 is now available. The purpose of this text-only erratum is to inform you about the security issues fixed. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5769-01 - 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 2023-5767-01 - 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 2023-5766-01 - 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 2023-5764-01 - 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 2023-5711-01 - 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.

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.

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

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.

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.

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.