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Security Leftovers

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  • Security updates for Wednesday [LWN.net]

    Security updates have been issued by Fedora (golang-github-gosexy-gettext, golang-github-hub, oci-seccomp-bpf-hook, and popub), Oracle (kernel and kernel-container), SUSE (python2-numpy), and Ubuntu (check-mk and pyjwt).

  • Takeaways from the White House Cyber Workforce and Education Summit [Ed: "Jim Zemlin, Executive Director of the Linux Foundation, was invited to participate," but he knows absolutely nothing about security and his wife is a Microsofter]

    Today the White House convened the White House Cyber Workforce and Education Summit to gather government and private-sector leaders to discuss how to address the labor shortage and other challenges for U.S. cybersecurity. The meeting included the nation’s top cybersecurity and workforce policy decision makers, including the National Cyber Director and the Cabinet secretaries from the Departments of Commerce, Homeland Security, and Labor and the Under Secretary of Education.

  • TeamViewer installs suspicious font only useful for web fingerprinting [Ed: Proprietary software is in general suspicious and you probably ought to avoid it any time you can]

    So, here’s a bit of a mystery: Why does TeamViewer – the popular remote desktop program – install a font it doesn’t use on your computer? The abstract font (shown in the above image) doesn’t seem to serve any purpose in the software. Intentional or not, it enables websites to detect if you have TeamViewer installed on your computer.

  • Securing Containers At Scale - Container Journal

    While containers deliver speed and agility to software development and deployment, they also add a layer of complexity that invites unprecedented security concerns, including how to manage vulnerabilities in a dynamic container deployment environment. The question then becomes how to ensure the technologies you are using to secure software within containers are keeping pace with both business and security? This is a question DevOps teams have been tasked with as they continually rethink their approach to application security (AppSec) and how to build and ship software in a containerized world.

    In addition to scanning container images before production, DevOps teams today also need to find and maintain continual visibility into their containers. Because containerized applications grow older, they are continually subject to new security vulnerabilities. Even though security patches are helpful, they do not guarantee the stability or security of a container. This must be handled through automation and better container management.

  • New Luna ransomware encrypts Windows, Linux, and ESXi systems [Ed: Windows has back doors as a ramp, Linux hasn't; but this is an attempt to give an illusion of parity, courtesy of a Microsoft boosting site]

    A new ransomware family dubbed Luna can be used to encrypt devices running several operating systems, including Windows, Linux, and ESXi systems.

More in Tux Machines

today's howtos

  • How to Change Comment Color in Vim – Fix Unreadable Blue Color

    Are you annoyed about the comment color in vim? The dark blue color of the comment is often hard to read. In this tutorial, we learn how to change the comment color in Vim. There are few methods we can use to look vim comment very readable.

  • How to Add Repository to Debian

    APT checks the health of all the packages, and dependencies of the package before installing it. APT fetches packages from one or more repositories. A repository (package source) is basically a network server. The term "package" refers to an individual file with a .deb extension that contains either all or part of an application. The normal installation comes with default repositories configured, but these contain only a few packages out of an ocean of free software available. In this tutorial, we learn how to add the package repository to Debian.

  • Making a Video of a Single Window

    I recently wanted to send someone a video of a program doing some interesting things in a single X11 window. Recording the whole desktop is easy (some readers may remember my post on Aeschylus which does just that) but it will include irrelevant (and possibly unwanted) parts of the screen, leading to unnecessarily large files. I couldn't immediately find a tool which did what I wanted on OpenBSD [1] but through a combination of xwininfo, FFmpeg, and hk I was able to put together exactly what I needed in short order. Even better, I was able to easily post-process the video to shrink its file size, speed it up, and contort it to the dimension requirements of various platforms. Here's a video straight out of the little script I put together: [...]

  • Things You Can And Can’t Do

    And it got me thinking about what you can and can’t do — what you do and don’t have control over.

  • allow-new-zones in BIND 9.16 on CentOS 8 Stream under SELinux

    We run these training systems with SELinux enabled (I wouldn’t, but my colleague likes it :-), and that’s the reason I aborted the lab: I couldn’t tell students how to solve the cause other than by disabling SELinux entirely, but there wasn’t enough time for that.

  • Will the IndieWeb Ever Become Mainstream?

    This is an interesting question, thanks for asking it, Jeremy. I do have some history with the IndieWeb, and some opinions, so let’s dive in.

    The short answer to the question is a resounding no, and it all boils down to the fact that the IndieWeb is really complicated to implement, so it will only ever appeal to developers.

  • How to Install CUPS Print Server on Ubuntu 22.04

    If your business has multiple personal computers in the network which need to print, then we need a device called a print server. Print server act intermediate between PC and printers which accept print jobs from PC and send them to respective printers. CUPS is the primary mechanism in the Unix-like operating system for printing and print services. It can allow a computer to act as a Print server. In this tutorial, we learn how to set up CUPS print server on Ubuntu 22.04.

Open Hardware: XON/XOFF and Raspberry Pi Pico

  • From XON/XOFF to Forward Incremental Search

    In the olden days of computing, software flow control with control codes XON and XOFF was a necessary feature that dumb terminals needed to support. When a terminal received more data than it could display, there needed to be a way for the terminal to tell the remote host to pause sending more data. The control code 19 was chosen for this. The control code 17 was chosen to tell the remote host to resume transmission of data.

  • Raspberry Pi Pico Used in Plug and Play System Monitor | Tom's Hardware

    Dmytro Panin is at it again, creating a teeny system monitor for his MacBook from scratch with help from our favorite microcontroller, the Raspberry Pi Pico. This plug-and-play system monitor (opens in new tab) lets him keep a close eye on resource usage without having to close any windows or launch any third-party programs. The device is Pico-powered and plugs right into the MacBook to function. It has a display screen that showcases a custom GUI featuring four bar graphs that update in real-time to show the performance of different components, including the CPU, GPU, memory, and SSD usage. It makes it possible to see how hard your PC is running at a glance.

Security Leftovers

How to Apply Accent Colour in Ubuntu Desktop

A step-by-step tutorial on how to apply accent colour in Ubuntu desktop (GNOME) with tips for Kubuntu and others. Read more