this post was submitted on 30 Mar 2024
474 points (84.4% liked)

linuxmemes

21311 readers
507 users here now

Hint: :q!

Sister communities:

Community rules (click to expand)

1. Follow the site-wide rules

2. Be civil
  • Understand the difference between a joke and an insult.
  • Do not harrass or attack members of the community for any reason.
  • Leave remarks of "peasantry" to the PCMR community. If you dislike an OS/service/application, attack the thing you dislike, not the individuals who use it. Some people may not have a choice.
  • Bigotry will not be tolerated.
  • These rules are somewhat loosened when the subject is a public figure. Still, do not attack their person or incite harrassment.
    • 3. Post Linux-related content
  • Including Unix and BSD.
  • Non-Linux content is acceptable as long as it makes a reference to Linux. For example, the poorly made mockery of sudo in Windows.
  • No porn. Even if you watch it on a Linux machine.
    • 4. No recent reposts
  • Everybody uses Arch btw, can't quit Vim, and wants to interject for a moment. You can stop now.
    •  

    Please report posts and comments that break these rules!

    Important: never execute code or follow advice that you don't understand or can't verify, especially here. The word of the day is credibility. This is a meme community -- even the most helpful comments might just be shitposts that can damage your system. Be aware, be smart, don't fork-bomb your computer.

    founded 1 year ago
    MODERATORS
    poopsmith@lemmy.world
    zephyr@lemmy.world
    rtxn@lemmy.world
    474
    Arch with XZ (lemmy.world)
    submitted 7 months ago by qwioeue@lemmy.world to c/linuxmemes@lemmy.world
    93 comments fedilink hide all child comments
     
    you are viewing a single comment's thread
    view the rest of the comments
    [–] Rustmilian@lemmy.world 32 points 7 months ago (2 children)

    Arch does not directly link openssh to liblzma, and thus this attack vector is not possible. You can confirm this by issuing the following command:

    ldd "$(command -v sshd)"
    [–] qwioeue@lemmy.world 7 points 7 months ago* (last edited 7 months ago) (4 children)

    Yes, this sshd attack vector isn't possible. However, they haven't decomposed the exploit and we don't know the extent of the attack. The reporter of the issue just scratched the surface. If you are using Arch, you should run pacman right now to downgrade.

    [–] Fubarberry@sopuli.xyz 36 points 7 months ago

    They actually have an upgrade fix for it, at least for the known parts of it. Doing a standard system upgrade will replace the xz package with one with the known backdoor removed.

    [–] HopFlop@discuss.tchncs.de 15 points 7 months ago

    If you are using Arch, you should run pacman right now to downgrade.

    No, just update. It's already fixed. Thats the point of rolling release.

    [–] Trail@lemmy.world 4 points 7 months ago

    Bold of you to assume I hare upgraded in the first place.

    [–] lemmyvore@feddit.nl 3 points 7 months ago

    I switched it with 5.4, just in case.

    [–] bitwolf@lemmy.one 0 points 7 months ago

    Do not use ldd on untrusted binaries.

    I executed the backdoor the other day when assessing the damage.

    objdump is the better tool to use in this case.