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    <fireside:genDate>Sat, 11 Apr 2026 07:45:27 -0500</fireside:genDate>
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    <title>LINUX Unplugged - Episodes Tagged with “Compression Libraries”</title>
    <link>https://linuxunplugged.com/tags/compression%20libraries</link>
    <pubDate>Sun, 31 Mar 2024 18:00:00 -0700</pubDate>
    <description>An open show powered by community LINUX Unplugged takes the best attributes of open collaboration and turns it into a weekly show about Linux.
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    <itunes:type>episodic</itunes:type>
    <itunes:subtitle>Weekly Linux talk show with no script, no limits, surprise guests and tons of opinion.</itunes:subtitle>
    <itunes:author>Jupiter Broadcasting</itunes:author>
    <itunes:summary>An open show powered by community LINUX Unplugged takes the best attributes of open collaboration and turns it into a weekly show about Linux.
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  <itunes:category text="Tech News"/>
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  <title>556: The xz Backdoor Exposed 🚨</title>
  <link>https://linuxunplugged.com/556</link>
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  <pubDate>Sun, 31 Mar 2024 18:00:00 -0700</pubDate>
  <author>Jupiter Broadcasting</author>
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  <itunes:episodeType>full</itunes:episodeType>
  <itunes:author>Jupiter Broadcasting</itunes:author>
  <itunes:subtitle>We're breaking down the attack: how it works, how it was hidden, and why time was running out for the attacker.</itunes:subtitle>
  <itunes:duration>1:10:03</itunes:duration>
  <itunes:explicit>no</itunes:explicit>
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  <description>We're breaking down the attack: how it works, how it was hidden, and why time was running out for the attacker. 
</description>
  <itunes:keywords>Jupiter Broadcasting, Linux Podcast, Linux Unplugged, xz, backdoor, remote code execution, OpenSSH, Debian, Fedora, Ubuntu, Kali Linux, Arch Linux, Gentoo, openSUSE, Alpine, NixOS, Jia Tan, trust model, burnout, systemd, transparency, open source, HUMINT, compression libraries,</itunes:keywords>
  <content:encoded>
    <![CDATA[<p>We&#39;re breaking down the attack: how it works, how it was hidden, and why time was running out for the attacker.</p><p>Sponsored By:</p><ul><li><a rel="nofollow" href="http://tailscale.com/linuxunplugged">Tailscale</a>: <a rel="nofollow" href="http://tailscale.com/linuxunplugged">Tailscale is a programmable networking software that is private and secure by default - get it free on up to 100 devices!</a></li><li><a rel="nofollow" href="https://1password.com/unplugged">1Password Extended Access Management</a>: <a rel="nofollow" href="https://1password.com/unplugged">Secure every sign-in for every app on every device.</a></li></ul><p><a rel="payment" href="https://jupitersignal.memberful.com/checkout?plan=52946">Support LINUX Unplugged</a></p><p>Links:</p><ul><li><a title="💥 Gets Sats Quick and Easy with Strike" rel="nofollow" href="https://strike.me/">💥 Gets Sats Quick and Easy with Strike</a></li><li><a title="📻 LINUX Unplugged on Fountain.FM" rel="nofollow" href="https://www.fountain.fm/show/dWiuBeqpDSM86AwXRXov">📻 LINUX Unplugged on Fountain.FM</a></li><li><a title="oss-security mailing list" rel="nofollow" href="https://www.openwall.com/lists/oss-security/2024/03/29/4">oss-security mailing list</a> &mdash; Backdoor in upstream xz/liblzma leading to ssh server compromise.
</li><li><a title="Fedora Announcement" rel="nofollow" href="https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users">Fedora Announcement</a></li><li><a title="Debian Announcement" rel="nofollow" href="https://security-tracker.debian.org/tracker/CVE-2024-3094">Debian Announcement</a></li><li><a title="Ubuntu Announcement" rel="nofollow" href="https://discourse.ubuntu.com/t/xz-liblzma-security-update/43714">Ubuntu Announcement</a></li><li><a title="Kali Linux Announcement" rel="nofollow" href="https://www.kali.org/blog/about-the-xz-backdoor/">Kali Linux Announcement</a></li><li><a title="Arch Linux Announcement" rel="nofollow" href="https://archlinux.org/news/the-xz-package-has-been-backdoored/">Arch Linux Announcement</a></li><li><a title="Gentoo Announcement" rel="nofollow" href="https://bugs.gentoo.org/928134">Gentoo Announcement</a></li><li><a title="openSUSE Tumbleweeed Announcement" rel="nofollow" href="https://news.opensuse.org/2024/03/29/xz-backdoor/">openSUSE Tumbleweeed Announcement</a></li><li><a title="NixOS Unstable Discussion" rel="nofollow" href="https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405">NixOS Unstable Discussion</a></li><li><a title="Why does it take two weeks for NixOS to replace xz?" rel="nofollow" href="https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405/5">Why does it take two weeks for NixOS to replace xz?</a></li><li><a title="Andres Freund on Mastodon" rel="nofollow" href="https://mastodon.social/@AndresFreundTec/112180406142695845">Andres Freund on Mastodon</a> &mdash; I was doing some micro-benchmarking at the time, needed to quiesce the system to reduce noise. Saw sshd processes were using a surprising amount of CPU, despite immediately failing because of wrong usernames etc....
</li><li><a title="rwmj on Hacker News" rel="nofollow" href="https://news.ycombinator.com/item?id=39865810">rwmj on Hacker News</a> &mdash; Very annoying - the apparent author of the backdoor was in communication with me over several weeks trying to get xz 5.6.x added to Fedora 40 &amp; 41 because of its "great new features"
</li><li><a title="A Microcosm of the interactions in Open Source projects" rel="nofollow" href="https://robmensching.com/blog/posts/2024/03/30/a-microcosm-of-the-interactions-in-open-source-projects/">A Microcosm of the interactions in Open Source projects</a> &mdash; Make no mistake. This is the way it works. It needs to change.
</li><li><a title="Devuan GNU/Linux on X" rel="nofollow" href="https://twitter.com/devuanorg/status/1774029432979653069?t=ASJqAbm5fVHDKeq7CLKqjw">Devuan GNU/Linux on X</a> &mdash; Devuan is not affected by the latest vulnerability caused by systemd.
</li><li><a title="systemd PR: Dynamically load compression libraries" rel="nofollow" href="https://github.com/systemd/systemd/pull/31550#issuecomment-1972737923">systemd PR: Dynamically load compression libraries</a></li><li><a title="Matteo Croce on X" rel="nofollow" href="https://twitter.com/teknoraver85/status/1774452847188312163">Matteo Croce on X</a> &mdash; I'm the author of such PR. While I absolutely didn't know that libxz had a backdoor, I really think that libraries should be loaded on-demand when rarely used, hence my change :)
</li><li><a title="Ryan C. Gordon on X" rel="nofollow" href="https://twitter.com/icculus/status/1774310925035524333">Ryan C. Gordon on X</a> &mdash; This is probably how the xz thing happened, right?
</li><li><a title="Jan Wildeboer on the Fediverse" rel="nofollow" href="https://social.wildeboer.net/@jwildeboer/112184074379919145">Jan Wildeboer on the Fediverse</a> &mdash; Again the FOSS world has proven to be vigilant and proactive in finding bugs and backdoors, IMHO.</li><li><a title="Unplugged Core Membership" rel="nofollow" href="https://unpluggedcore.com/">Unplugged Core Membership</a></li><li><a title="TXLF is coming up! " rel="nofollow" href="https://2024.texaslinuxfest.org/">TXLF is coming up! </a> &mdash; April 12 - 13 in Austin, Texas.
</li><li><a title="LFNW coming up!" rel="nofollow" href="https://linuxfestnorthwest.org/">LFNW coming up!</a> &mdash; April 26 - 28
</li><li><a title="Mobile Game Ads Are Boosting Podcast Follower Counts" rel="nofollow" href="https://www.bloomberg.com/news/newsletters/2024-03-28/mobile-game-ads-are-boosting-podcast-follower-counts">Mobile Game Ads Are Boosting Podcast Follower Counts</a> &mdash; Wondery, iHeart and Lemonada Media are all using a non-public product from MowPod - which gives extra lives and game credits to gamers if they follow shows on Apple Podcasts from game apps.
</li><li><a title="MowPod&#39;s podcast promotion tools: tales from the bar" rel="nofollow" href="https://podnews.net/article/mowpod-promotion">MowPod's podcast promotion tools: tales from the bar</a></li><li><a title="fortydeux&#39;s NixOS Configs" rel="nofollow" href="https://github.com/fortydeux/Fortydeux-NixOS-System-Flake/">fortydeux's NixOS Configs</a></li><li><a title="Prism Launcher" rel="nofollow" href="https://prismlauncher.org/">Prism Launcher</a> &mdash; An Open Source Minecraft launcher with the ability to manage multiple instances, accounts and mods.
</li><li><a title="World Backup Day — March 31st" rel="nofollow" href="https://www.worldbackupday.com/en/">World Backup Day — March 31st</a> &mdash; One small accident or failure could destroy all the important stuff you care about.
</li><li><a title="Updating Our Fiddly Bits | LINUX Unplugged 494" rel="nofollow" href="https://www.jupiterbroadcasting.com/show/linux-unplugged/494/">Updating Our Fiddly Bits | LINUX Unplugged 494</a></li></ul>]]>
  </content:encoded>
  <itunes:summary>
    <![CDATA[<p>We&#39;re breaking down the attack: how it works, how it was hidden, and why time was running out for the attacker.</p><p>Sponsored By:</p><ul><li><a rel="nofollow" href="http://tailscale.com/linuxunplugged">Tailscale</a>: <a rel="nofollow" href="http://tailscale.com/linuxunplugged">Tailscale is a programmable networking software that is private and secure by default - get it free on up to 100 devices!</a></li><li><a rel="nofollow" href="https://1password.com/unplugged">1Password Extended Access Management</a>: <a rel="nofollow" href="https://1password.com/unplugged">Secure every sign-in for every app on every device.</a></li></ul><p><a rel="payment" href="https://jupitersignal.memberful.com/checkout?plan=52946">Support LINUX Unplugged</a></p><p>Links:</p><ul><li><a title="💥 Gets Sats Quick and Easy with Strike" rel="nofollow" href="https://strike.me/">💥 Gets Sats Quick and Easy with Strike</a></li><li><a title="📻 LINUX Unplugged on Fountain.FM" rel="nofollow" href="https://www.fountain.fm/show/dWiuBeqpDSM86AwXRXov">📻 LINUX Unplugged on Fountain.FM</a></li><li><a title="oss-security mailing list" rel="nofollow" href="https://www.openwall.com/lists/oss-security/2024/03/29/4">oss-security mailing list</a> &mdash; Backdoor in upstream xz/liblzma leading to ssh server compromise.
</li><li><a title="Fedora Announcement" rel="nofollow" href="https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users">Fedora Announcement</a></li><li><a title="Debian Announcement" rel="nofollow" href="https://security-tracker.debian.org/tracker/CVE-2024-3094">Debian Announcement</a></li><li><a title="Ubuntu Announcement" rel="nofollow" href="https://discourse.ubuntu.com/t/xz-liblzma-security-update/43714">Ubuntu Announcement</a></li><li><a title="Kali Linux Announcement" rel="nofollow" href="https://www.kali.org/blog/about-the-xz-backdoor/">Kali Linux Announcement</a></li><li><a title="Arch Linux Announcement" rel="nofollow" href="https://archlinux.org/news/the-xz-package-has-been-backdoored/">Arch Linux Announcement</a></li><li><a title="Gentoo Announcement" rel="nofollow" href="https://bugs.gentoo.org/928134">Gentoo Announcement</a></li><li><a title="openSUSE Tumbleweeed Announcement" rel="nofollow" href="https://news.opensuse.org/2024/03/29/xz-backdoor/">openSUSE Tumbleweeed Announcement</a></li><li><a title="NixOS Unstable Discussion" rel="nofollow" href="https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405">NixOS Unstable Discussion</a></li><li><a title="Why does it take two weeks for NixOS to replace xz?" rel="nofollow" href="https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405/5">Why does it take two weeks for NixOS to replace xz?</a></li><li><a title="Andres Freund on Mastodon" rel="nofollow" href="https://mastodon.social/@AndresFreundTec/112180406142695845">Andres Freund on Mastodon</a> &mdash; I was doing some micro-benchmarking at the time, needed to quiesce the system to reduce noise. Saw sshd processes were using a surprising amount of CPU, despite immediately failing because of wrong usernames etc....
</li><li><a title="rwmj on Hacker News" rel="nofollow" href="https://news.ycombinator.com/item?id=39865810">rwmj on Hacker News</a> &mdash; Very annoying - the apparent author of the backdoor was in communication with me over several weeks trying to get xz 5.6.x added to Fedora 40 &amp; 41 because of its "great new features"
</li><li><a title="A Microcosm of the interactions in Open Source projects" rel="nofollow" href="https://robmensching.com/blog/posts/2024/03/30/a-microcosm-of-the-interactions-in-open-source-projects/">A Microcosm of the interactions in Open Source projects</a> &mdash; Make no mistake. This is the way it works. It needs to change.
</li><li><a title="Devuan GNU/Linux on X" rel="nofollow" href="https://twitter.com/devuanorg/status/1774029432979653069?t=ASJqAbm5fVHDKeq7CLKqjw">Devuan GNU/Linux on X</a> &mdash; Devuan is not affected by the latest vulnerability caused by systemd.
</li><li><a title="systemd PR: Dynamically load compression libraries" rel="nofollow" href="https://github.com/systemd/systemd/pull/31550#issuecomment-1972737923">systemd PR: Dynamically load compression libraries</a></li><li><a title="Matteo Croce on X" rel="nofollow" href="https://twitter.com/teknoraver85/status/1774452847188312163">Matteo Croce on X</a> &mdash; I'm the author of such PR. While I absolutely didn't know that libxz had a backdoor, I really think that libraries should be loaded on-demand when rarely used, hence my change :)
</li><li><a title="Ryan C. Gordon on X" rel="nofollow" href="https://twitter.com/icculus/status/1774310925035524333">Ryan C. Gordon on X</a> &mdash; This is probably how the xz thing happened, right?
</li><li><a title="Jan Wildeboer on the Fediverse" rel="nofollow" href="https://social.wildeboer.net/@jwildeboer/112184074379919145">Jan Wildeboer on the Fediverse</a> &mdash; Again the FOSS world has proven to be vigilant and proactive in finding bugs and backdoors, IMHO.</li><li><a title="Unplugged Core Membership" rel="nofollow" href="https://unpluggedcore.com/">Unplugged Core Membership</a></li><li><a title="TXLF is coming up! " rel="nofollow" href="https://2024.texaslinuxfest.org/">TXLF is coming up! </a> &mdash; April 12 - 13 in Austin, Texas.
</li><li><a title="LFNW coming up!" rel="nofollow" href="https://linuxfestnorthwest.org/">LFNW coming up!</a> &mdash; April 26 - 28
</li><li><a title="Mobile Game Ads Are Boosting Podcast Follower Counts" rel="nofollow" href="https://www.bloomberg.com/news/newsletters/2024-03-28/mobile-game-ads-are-boosting-podcast-follower-counts">Mobile Game Ads Are Boosting Podcast Follower Counts</a> &mdash; Wondery, iHeart and Lemonada Media are all using a non-public product from MowPod - which gives extra lives and game credits to gamers if they follow shows on Apple Podcasts from game apps.
</li><li><a title="MowPod&#39;s podcast promotion tools: tales from the bar" rel="nofollow" href="https://podnews.net/article/mowpod-promotion">MowPod's podcast promotion tools: tales from the bar</a></li><li><a title="fortydeux&#39;s NixOS Configs" rel="nofollow" href="https://github.com/fortydeux/Fortydeux-NixOS-System-Flake/">fortydeux's NixOS Configs</a></li><li><a title="Prism Launcher" rel="nofollow" href="https://prismlauncher.org/">Prism Launcher</a> &mdash; An Open Source Minecraft launcher with the ability to manage multiple instances, accounts and mods.
</li><li><a title="World Backup Day — March 31st" rel="nofollow" href="https://www.worldbackupday.com/en/">World Backup Day — March 31st</a> &mdash; One small accident or failure could destroy all the important stuff you care about.
</li><li><a title="Updating Our Fiddly Bits | LINUX Unplugged 494" rel="nofollow" href="https://www.jupiterbroadcasting.com/show/linux-unplugged/494/">Updating Our Fiddly Bits | LINUX Unplugged 494</a></li></ul>]]>
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