#dos

Red Hat Security Advisory 2023-5603-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include denial of service, out of bounds write, and use-after-free vulnerabilities.

Red Hat Security Advisory 2023-5587-01 - Kernel-based Virtual Machine offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems. Issues addressed include buffer overflow, code execution, and denial of service vulnerabilities.

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

Use of default credentials vulnerability in MR-GM2 firmware Ver. 3.00.03 and earlier, and MR-GM3 (-D/-K/-S/-DK/-DKS/-M/-W) firmware Ver. 1.03.45 and earlier allows a network-adjacent unauthenticated attacker to intercept wireless LAN communication, when the affected product performs the communication without changing the pre-shared key from the factory-default configuration.

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.

### Impact The MsQuic server will continue to leak memory until no more is available, resulting in a denial of service. ### Patches The following patch was made: - Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/d364feeda0dd8b729eca6fef149c1ef98630f0cb ### Workarounds Beyond upgrading to the patched versions, there is no other workaround.

October's CVE update is here. Here's which security vulnerabilities to patch now to exorcise your Microsoft systems demons.

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.

### Impact A malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. ### Patches Server administrators are advised to upgrade to Synapse 1.94.0 or later. ### Workarounds Rooms with malicious server ACL events can be [purged and blocked](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version) using the admin API. ### References https://github.com/matrix-org/synapse/pull/16360