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

725 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.

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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

[–] aqua@lemmy.world 3 points 2 years ago (10 children)

Should I change passwords or no?

[–] hyorvenn@lemmy.world 3 points 2 years ago (1 children)

If you have to ask, just change it. It's free and quick, and it's good practice.

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

May I ask was is the JWS coockinand if it is automatically changed or if we have to change it in a way?

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

Damnit, spez.

[–] Tom2day@lemmy.world 2 points 2 years ago

Thanks.

[–] medvedev@lemmy.world 2 points 2 years ago

thanks to admin team for resolving that quickly

[–] gabriele97@lemmy.g97.top 2 points 2 years ago (1 children)

How are you preventing it to happen again until a patch is released from devs?

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

Is that why Liftoff wasn't loading?

[–] antik@lemmy.world 2 points 2 years ago (10 children)

Most likely. Have you tried re-adding your account to Liftoff?

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

I lost some of my post history. Is there a data issue that's come from this? Why are my comments gone?

[–] pgetsos@kbin.social 2 points 2 years ago (1 children)

If it is only recent post history, maybe it was purged along with many malicious comments/posts

[–] mourkeer@lemmy.world 2 points 2 years ago

I know but this was over a week of comments lost.

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

Is there a rough time range when it happened? and any news about other big instances like lemmy.ml? Are those safe? Currently they are not on the same version as lemmy.world.

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[–] Nomadic@lemmy.world 2 points 2 years ago

Maybe there needs to be a quick rundown how to actually log out and in on clients, seems you can't with jerboa without just wiping the app, and wefwef, you need to delete all accounts.

I see some instances are throwing server errors

[–] sheetmysharts@lemmy.world 2 points 2 years ago

Thanks to everyone involved for the quick response 👍

[–] chokidar@lemmy.world 2 points 2 years ago

Well done on acting on it so quickly. I think I did see some of the fake announcements you were referring too but were taken down very quickly. Keep up the good work team and thanks for everything you are doing!

[–] donut4ever@sh.itjust.works 2 points 2 years ago (6 children)

Still unable to log in. Is this everyone or just me?

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

Is this why I had to sign in and out of my account on liftoff?

I couldn't comment untill I did that. There may be others!

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[–] BugleFingers@lemmy.world 2 points 2 years ago

Because I am obsessed with bugles, any comment or post I make that does not manage to fit bugles in somewhere (because I always have room for bugles) will be an imposter!

Thank you for the transparency and keeping my nefarious bugle consumption private!

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