Language Selection

English French German Italian Portuguese Spanish

Security: Patches, Linux Format Special and POWER9 Problems

Filed under
Security
  • Security updates for Friday

    Security updates have been issued by CentOS (firefox), Fedora (chromium, microcode_ctl, mingw-libxml2, seamonkey, and xen), openSUSE (slurm_18_08 and tor), Oracle (thunderbird), SUSE (buildah, firefox, go1.14, go1.15, krb5, microcode_ctl, perl-DBI, podman, postgresql12, thunderbird, ucode-intel, wireshark, wpa_supplicant, and xen), and Ubuntu (firefox and phpmyadmin).

  • Cyber insecurity | Linux Format

    Each year we proclaim it’s time to learn how to hack. But why? Jonni always gets angry at the subversion of the term ‘hacking’ and I can understand why. Hacking is fun, as is finding out how systems work and how to get them to do things they were never meant to do.

    With open source and the Linux ecosystem there’s an abundance of hacking fun to be had, and it’s no wonder all the key tools for learning how to hack – and actually hack – are developed and run out of Linux systems.

    For this year’s look at the world of hacking Jonni’s introducing you to the metasploit framework. This is a playground where you can learn, explore and develop hacking skills. It’s usually paired with Kali Linux, and we’re putting these on the Linux Format DVD, which makes a welcome return.

  • IBM POWER9 CPUs Need To Flush Their L1 Cache Between Privilege Boundaries Due To New Bug

    CVE-2020-4788 is now public and it's not good for IBM and their POWER9 processors... This new vulnerability means these IBM processors need to be flushing their L1 data cache between privilege boundaries, similar to other recent CPU nightmares.

    While IBM POWER9 allows speculatively operating on completely validated data in the L1 cache, when it comes to incompletely validated data that bad things can happen. Paired with other side channels, local users could improperly obtain data from the L1 cache.

    CVE-2020-4788 was made public this morning and is now causing all stable Linux kernel series to receive the mitigation that amounts to hundreds of lines of new code. The mitigation is flushing the L1 data cache for IBM POWER9 CPUs across privilege boundaries -- both upon entering the kernel and on user accesses.

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.