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Security Leftovers

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Security
  • Security updates for Tuesday

    Security updates have been issued by Fedora (expat and radare2), Oracle (thunderbird), Red Hat (389-ds-base, keepalived, libssh2, perl, and vim), Scientific Linux (thunderbird), SUSE (bzip2, kernel, podofo, systemd, webkit2gtk3, and xrdp), and Ubuntu (bash, nss, redis, squid, squid3, and Zipios).

  • Explainer: What is post-quantum cryptography?

    Few of us give much thought to the tiny padlock symbol that appears in our web browsers every time we use an e-commerce site, send and receive emails, or check our bank or credit card accounts. But it’s a signal that the online services are using HTTPS, a web protocol that encrypts the data we send across the internet and the responses we receive. This and other forms of encryption protect all kinds of electronic communications, as well as things like passwords, digital signatures, and health records.

  • Monitoring Linux Logs with Kibana and Rsyslog

    f you are a system administrator, or even a curious application developer, there is a high chance that you are regularly digging into your logs to find precious information in them.

    Sometimes you may want to monitor SSH intrusions on your VMs.

    Sometimes, you might want to see what errors were raised by your application server on a certain day, on a very specific hour. Or you may want to have some insights about who stopped your systemd service on one of your VMs.

    If you pictured yourself in one of those points, you are probably on the right tutorial.

    In this tutorial, we are to build a complete log monitoring pipeline using the ELK stack (ElasticSearch, Logstash and Kibana) and Rsyslog as a powerful syslog server.

    Before going any further, and jumping into technical considerations right away, let’s have a talk about why do we want to monitor Linux logs with Kibana.

  • Critical Vulnerability Found In Ad Inserter WordPress Plugin [Ed: Well, ads are malicious, many are literally malware, so people who put this crap in their site ask for if not deserve the worst.]

    On July 12, Wordfence team(Another popular security plugin for WordPress), discovered a vulnerability called RCE — Remote Code Execution in Ad inserter. This vulnerability can allow an attacker to run any arbitrary PHP code on the site.

    The vulnerability was found in Ad preview module of the plugin where you can preview the ads position, size, etc. before publishing it. This action can only be executed by the WordPress administrators and to ensure this, the plugin writer used WordPress function ‘check_admin_referer()‘ which ensures that the action is being performed by the administrator.

    Wordfence threat intelligence team who discovered this vulnerability said the ‘check_admin_referer()‘ function is not enough protection. check_admin_referer() is designed to protect against CSRF (Cross-site request forgery) and the way it ensures this is by checking if nonce (a one-time token) exists in the request.

  • Wanna work on Debian LTS (and get funded)?

    If you are in Curitiba and are interested to work on Debian LTS (and get paid for that work), please come and talk to me, Debian LTS is still looking for more contributors!

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today's howtos

Wine 4.0.2 Released

  • Wine Announcement

    The Wine maintenance release 4.0.2 is now available.

  • Wine 4.0.2 Released With 66 Bug Fixes

    Wine 4.0.2 is out today as the second stable point release to this year's Wine 4.0 cycle. As is customary for Wine stable point releases, only bug fixes are allowed in while new features come by way of the bi-weekly development releases that will lead up to the Wine 5.0 release in early 2020.

  • The stable Wine 4.0.2 release is now available

    If you prefer to walk on the calmer side of life, the Wine 4.0.2 release has been made available today. As it's just a "maintenance" release, there's no big new features which are reserved for the current 4.xx series currently at 4.14 released on August 17th. With that in mind they noted 66 bugs being marked as solved. These bugs include issues with Worms 2, Warframe, Rogue Squadron 3D, Settlers III, Mass Effect, F.E.A.R. 2: Project Origin, The Sims and plenty more.

  • Linux Gaming FINALLY Doesn't SUCK!

28 facts about Linux for its 28th birthday

Nearly three decades ago, Linus Torvalds sent the email announcing Linux, a free operating system that was "just a hobby" and not "big and professional like GNU." It's fair to say that Linux has had an enormous influence on technology and the world in general in the 28 years since Torvalds announced it. Most people already know the "origin story" of Linux, though. Here's 28 things about Linux (the kernel and larger ecosystem) you may not already know. 1 - Linux isn't very useful alone, so folks took to creating Linux distributions to bundle user software with it, make it usable and easier to install. The first Linux distribution was Softlanding Linux System (SLS), first released in 1992 and using the .96p4 Linux kernel. You could buy it on 5.25" or 3.5" floppies, or CD-ROM if you were high-tech. If you wanted a GUI, you needed at least 8MB of RAM. 2 - SLS didn't last, but it influenced Slackware Linux, which was first released in 1993 and is still under development today. Slackware is the oldest surviving Linux distribution and celebrated its 26th birthday on July 17th this year. 3 - Linux has the largest install base of any general purpose operating system. It powers everything from all 500 of the Top 500 Supercomputers to Android phones, Chomebooks, and all manner of embedded devices and things like the Kindle eBook readers and smart televisions. (Also the laptop used to write this post.) Read more

Quick Guide to The Awesome GNOME Disk Utility

GNOME Disk Utility is an awesome tool to maintain hard disk drives that shipped with Ubuntu. It's called simply "Disks" on start menu on 19.04, anyway. It's able to format hard disks and USB sticks, create and remove partitions, rename partitions, and check disk health. Not only that, it also features writing ISO into disk and vice versa, create ISO image of a disk. This tutorial explains in brief how to use it for 8 purposes. Let's go! Read more