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.

you are viewing a single comment's thread
view the rest of the comments

[–] linearchaos@lemmy.world 2 points 1 year ago

I work for a mobile game company. Millions of clients. We deal with this a lot. You can't even predict that they'll stay in the same class A. I wouldn't be surprised if they worked out a way to hand off ipv4 to 6 and vice-versa.

Then you have ISP's and large work networks who send everyone out under the same NAT/PAT, 10's of thousands of users all coming from one address.

IMO Providing a public service then trying to identify individuals by network without screwing someone over is a fools errand.

If you're dipping logs and see one jackass doing something on x IP, you always have to go back and see how many ip's that jackass is coming from and also how much viable traffic is coming from that ip.