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The meeting will open at 6:00p.m. Central Time.

The presentation(s) will begin at 6:30p.m. Central Time.

April 18, 2024 Meetup

St. Louis Linux Users Group

Create a striking and moody image representing a security issue for a blog announcement titled 'The XZ Hack: Unveiling the Near-Miss in xz and liblzma'. The image should have a gradient background transitioning from dark blue to black, symbolizing sophistication and ominousness. In the center, a high-resolution image of a lock that's half-broken with glowing red crack lines emanating from it should be placed, symbolizing compromise in security and vulnerability. At the top-left, subtly blend the logo of a utility unit and at the bottom-left, place a logo honoring open-source operating systems. A grayscale logo of a tech news site should be positioned at the bottom right. Overlaid faintly across the image horizontally should be binary code, representing underlying data. A shadowy image of a hacker should be blended into the background on one side, suggesting the undetected threat. Red accents or highlights around the broken lock and a soft white glow around the logos should be present to draw focus.

The XZ Hack

Presented By: Andrew Denner

The backdoor in xz and liblzma is a serious near miss that thankfully did not make it into most production linux distributions and could have been far worse if it hadn't been caught by a developer noticing his ssh login took an extra half a second.

This hack is an impressive long con by someone who had been given maintainer status in the tool. We will cover how it worked from a high level, how it almost was a far more serious issue than it is, and what it means for the FOSS world. (Also why this issue is causing me to loose sleep over it)

(This was noted in an ArsTechnica article on March 29 (ie ~ 20 days ago.) Same day, stlLUG members were posting it in our DISCUSS email-list. On April 11, there was a ~5min on-air interview with the MS engineer who discovered it, including comments about open-src vs closed-src. This interview was on the general public's NPR radio. The backdoor seems to have been loose in the public since at least Feb 23?)

CVE-2024-3094.

security

Spread the word

Goofy Profile Picture of Tux

@LovesToLS • 1h ago

🔍 Uncover the secrets of 'The XZ Hack' on 2024-04-18 with Andrew Denner! Learn how a half-second delay in SSH login helped identify a major security flaw before it could wreak more havoc! #CVE20243094 #FOSS #Linux #SLUUG https://www.meetup.com/saint-louis-unix-users-group/events/298136396/

Meeting Artifacts and Media

Meeting Agenda

At 6:00p.m. Central Time the meeting opens. Participants are encouraged to join at this time to if they need to test their microphone, screen sharing, and video camera.

At 6:30p.m. Central Time we attempt a quick welcome, introductions, announcements, current events of interest, and a general CALL FOR HELP (Questions and Answers) segment.

At 6:45p.m. Central Time the presentation begins.