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Security Leftovers

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Security
  • How a glitch in the Matrix led to apps potentially exposing encrypted chats

    The Matrix.org Foundation, which oversees the Matrix decentralized communication protocol, said on Monday multiple Matrix clients and libraries contain a vulnerability that can potentially be abused to expose encrypted messages.

    The organization said a blunder in an implementation of the Matrix key sharing scheme – designed to allow a user's newly logged-in device to obtain the keys to decrypt old messages – led to the creation of client code that fails to adequately verify device identity. As a result, an attacker could fetch a Matrix client user's keys.

    Specifically, a paragraph in Matrix E2EE (end-to-end encryption) Implementation Guide, which described the desired key handling routine, was followed in the creation of Matrix's original matrix-js-sdk code. According to the foundation, this SDK "did not sufficiently verify the identity of the device requesting the keyshare," and this oversight made its way into other libraries and Matrix chat clients.

  • How to use iPerf3 to test network bandwidth

    Admins must measure the throughput of their WAN links to ensure they are working properly. One way to do that is by using iPerf, the open source benchmarking utility. The latest version, iPerf3, is a complete rewrite of the code first developed by the National Laboratory for Applied Network Research in the 2000s.

    Like its predecessors, iPerf3 tests the bandwidth between any two networked computers to determine if the available bandwidth is large enough to support the transmission of an application.

    IPerf3 is built on a client-server model and measures maximum User Datagram Protocol, TCP and Stream Control Transmission Protocol throughput between client and server stations. It can also be used to measure LAN and wireless LAN throughput.

  • How to: Run OpenVPN on Windows, Mac, and Linux/Unix - Wi-FiPlanet.com

    Learn what it takes to get an OpenVPN Ethernet tunnel set up between a laptop computer and an office or home machine acting as an OpenVPN server.

  • Josh Bressers: Episode 289 – Who left this 0day on the floor?

    Josh and Kurt talk about an unusual number of really bad security updates. We even recorded this before the Azure OMIGOD vulnerability was disclosed. It’s certainly been a wild week with Apple and Chrome 0days, and a Travis CI secret leak. Maybe this is the new normal.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.