Red Hat Security Advisory 2023-5840-01

Ubuntu Security Notice 7067-1 - It was discovered that HAProxy did not properly limit the creation of new HTTP/2 streams. A remote attacker could possibly use this issue to cause HAProxy to consume excessive resources, leading to a denial of service.

Red Hat Security Advisory 2024-1454-03 - Red Hat OpenShift Container Platform release 4.13.38 is now available with updates to packages and images that fix several bugs and add enhancements.

Red Hat Security Advisory 2024-0660-03 - Red Hat OpenShift Container Platform release 4.13.32 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 2024-0642-03 - An update is now available for Red Hat OpenShift Container Platform 4.14. Issues addressed include denial of service and traversal vulnerabilities.

Red Hat Security Advisory 2023-7607-03 - Red Hat OpenShift Container Platform release 4.12.45 is now available with updates to packages and images that fix several bugs.

Red Hat Security Advisory 2023-7478-01 - Red Hat OpenShift Container Platform release 4.11.54 is now available with updates to packages and images that fix several bugs.

Red Hat Security Advisory 2023-7334-01 - An update for rh-varnish6-varnish is now available for Red Hat Software Collections. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-6251-01 - Red Hat OpenShift Virtualization release 4.11.7 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 2023-6217-01 - Red Hat OpenShift Container Platform low-latency extras release 4.14, which provides an update for cnf-tests-container, dpdk-base-container, NUMA-aware secondary scheduler and numaresources-operator is now available. Issues addressed include a denial of service vulnerability.

Hello everyone! October was an interesting and busy month for me. I started a new job, worked on my open source Vulristics project, and analyzed vulnerabilities using it. Especially Linux vulnerabilities as part of my new Linux Patch Wednesday project. And, of course, analyzed Microsoft Patch Tuesday as well. In addition, at the end of […]

Red Hat Security Advisory 2023-6144-01 - An update for custom-metrics-autoscaler-adapter-container, custom-metrics-autoscaler-admission-webhooks-container, custom-metrics-autoscaler-container, custom-metrics-autoscaler-operator-bundle-container, and custom-metrics-autoscaler-operator-container is now available for the Custom Metric Autoscaler operator for Red Hat OpenShift. Issues addressed include a denial of service vulnerability.

Ubuntu Security Notice 6438-2 - USN-6438-1 fixed vulnerabilities in .Net. It was discovered that the fix for [CVE-2023-36799] was incomplete. This update fixes the problem. Kevin Jones discovered that .NET did not properly process certain X.509 certificates. An attacker could possibly use this issue to cause a denial of service. 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 2023-6079-01 - Red Hat Integration Camel for Spring Boot 3.20.3 release and security update is now available. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5980-01 - Updated Satellite 6.11 packages that fix several bugs are now available for Red Hat Satellite. Issues addressed include code execution and denial of service vulnerabilities.

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.

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 2023-5950-01 - An update is now available for Red Hat OpenShift Service Mesh 2.2 for RHEL 8.

Red Hat Security Advisory 2023-5929-01 - An update for tomcat is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.

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 2023-5849-01 - 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 2023-5837-01 - 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 2023-5809-01 - 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 2023-5801-01 - Migration Toolkit for Runtimes 1.2.1 Images. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5783-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector, the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library. This release of Red Hat JBoss Web Server 5.7.5 serves as a replacement for Red Hat JBoss Web Server 5.7.4. This release includes bug fixes, enhancements and component upgrades, which are documented in the Release Notes, linked to in the References section. Issues addressed include a denial of service vulnerability.

Red Hat Security Advisory 2023-5710-01 - .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 2023-5765-01 - 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 2023-5711-01 - 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.

Red Hat Security Advisory 2023-5709-01 - .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 7.0 to SDK 7.0.112 and Runtime 7.0.12. 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 ...

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 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.

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.