this post was submitted on 10 Jul 2023
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Lemmy.World Announcements

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Lemmy.world (and some others) were hacked (lemmy.world)
submitted 2 years ago* (last edited 2 years ago) by ruud@lemmy.world to c/lemmyworld@lemmy.world
724 comments fedilink hide all child comments
 

While I was asleep, apparently the site was hacked. Luckily, (big) part of the lemmy.world team is in US, and some early birds in EU also helped mitigate this.

As I am told, this was the issue:

  • There is an vulnerability which was exploited
  • Several people had their JWT cookies leaked, including at least one admin
  • Attackers started changing site settings and posting fake announcements etc

Our mitigations:

  • We removed the vulnerability
  • Deleted all comments and private messages that contained the exploit
  • Rotated JWT secret which invalidated all existing cookies

The vulnerability will be fixed by the Lemmy devs.

Details of the vulnerability are here

Many thanks for all that helped, and sorry for any inconvenience caused!

Update While we believe the admins accounts were what they were after, it could be that other users accounts were compromised. Your cookie could have been 'stolen' and the hacker could have had access to your account, creating posts and comments under your name, and accessing/changing your settings (which shows your e-mail).

For this, you would have had to be using lemmy.world at that time, and load a page that had the vulnerability in it.

(page 7) 50 comments
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[–] padjakkels@lemmy.world 4 points 2 years ago

Thanks for the quick reaction and TRANSPARENCY!!

[–] ReepusVanguard@lemmy.dbzer0.com 4 points 2 years ago (1 children)

My main is locked up and it sucks, i hope this all gets fixed.

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[–] stink_pickle@lemmy.world 4 points 2 years ago* (last edited 2 years ago) (2 children)

Um, probably coincidence or a false posi, but malwarebytes is labeling lemmy.~~world~~today as being compromised / malicious when following external links, it's only popped up twice, but here's a slightly redacted log file:

-Log Details- Protection Event Date: 7/10/23 Protection Event Time: 1:24 PM

-Software Information- Version: 4.5.33.272 Components Version: 1.0.2069 Update Package Version: 1.0.72209 License: Premium

-System Information- OS: Windows 11 (Build 22621.1928) CPU: x64 File System: NTFS User: System

-Blocked Website Details- Malicious Website: 1 , C:\Program Files\Google\Chrome Beta\Application\chrome.exe, Blocked, -1, -1, 0.0.0, ,

-Website Data- Category: Compromised Domain: lemmy.today

(end)

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[–] dreadedsemi@lemmy.world 4 points 2 years ago

I hope devs will examine all parts of the code that display content to make sure proper sanitization

[–] TheFonz@lemmy.world 4 points 2 years ago (1 children)

Seem to have a hard time loging in

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[–] Molecular0079@lemmy.world 3 points 2 years ago

Thanks for the post-mortem and the quick fix! Glad you guys around to help battle test Lemmy's code.

[–] Jakdracula@lemmy.world 3 points 2 years ago (4 children)

I’d like to logout, then log back in, because I can’t upvote / downvote- how do I logout? I can’t seem to find a logout button.

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[–] Simodeus@lemmy.world 3 points 2 years ago* (last edited 2 years ago) (1 children)

It seems that I lost all my subs. There were not many but still annoying.

E: Still subbed but can't see those in Voyager.

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[–] Saad07@lemmy.world 3 points 2 years ago

So that was why the logo and name was changed to israel. And for some reason getting redirected to a gif that was from lemmy

[–] binary45@lemmy.world 3 points 2 years ago (2 children)

Is that why I got logged off?

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