this post was submitted on 18 Jun 2026
352 points (99.2% liked)

Blahaj Lemmy Meta

2887 readers
460 users here now

Blåhaj Lemmy is a Lemmy instance attached to blahaj.zone. This is a group for questions or discussions relevant to either instance.

founded 3 years ago
MODERATORS
 

Firstly, apologies to everyone for the extended downtime. Unfortunately, it was for a pretty bad reason. We were hacked.

The bad news is that it was a comprehensive attack, and the attackers had privileged access to our database system, across all of our services (except for writefreely, which doesn't use postgres). From what we can tell, the attacker did not do anything with that access, so we don't believe any user data was accessed, but we can't be certain of that. For lemmy, the impact of this should be minimal. If you registered with a real email address, they may have that. User passwords are encrypted in the database, so if you were using a secure, non trivial password, it should be safe, but you should still change it. You should also reset your 2 factor authentication if you had it enabled, as the seeds for these are not encrypted.

Our understanding is that the attacker used a peertube exploit, then a postgres exploit and then a kernel exploit to systematically gain access to different layers of our database server. A side effect of the hack was that it filled up our database servers hard drive, and caused it to fail over to our backup, which we believe mitigated some of the potential fall out.

We have had to reset activitypub keypairs for every account and community on lemmy, so there may be some federation hicoughs for a day or so, until remote servers have dropped any cached copies of our users public keys. This is uncharted territory though, so hopefully it's as smooth as we think it will be, but we can't be sure!

As stated earlier, our writefreely instance is still up and running as it wasn't impacted by this attack. Vernissage (our pixelfed replacement) has been brought back online, as has our matrix server.

We will be bringing up Sharkey, and then Piefed hopefully later today, but we have to rotate keypairs on those services too, which is also uncharted territory, so the timelines are hopes, not guarantees. At this point in time, we don't plan on bringing pixelfed back online, as it was slated for shutdown in August in any case. If people still need access to pixelfed to export data, we can spin it up briefly if needed, so please reach out if this is you. We also won't be bringing peertube back up at this point. It was not heavily utilised, and it was the source of the attack, so Kaity is a bit gun shy about spinning it back up on shared database infrastructure. If there is a strong desire to bring peertube back, we can consider doing that on isolated hardware, but at the current utilisation level, it doesn't seem worth the cost/effort to run it isolated.

in any case, you can read a fuller explanation of the attack by Kaity here https://pen.blahaj.zone/supakaity/weve-been-hacked

top 47 comments
sorted by: hot top controversial new old
[–] ianhclark510@lemmy.blahaj.zone 3 points 31 minutes ago

It’s good to be back

[–] Goldholz@lemmy.blahaj.zone 7 points 2 hours ago

Had a feeling that this was the fact. Glad to be back

[–] peanuts4life@lemmy.blahaj.zone 3 points 2 hours ago

So happy you're back! I was so desperate as to visit Reddit a few times. It was horrible. You're amazing! ❤️❤️❤️

[–] birdwing@lemmy.blahaj.zone 19 points 7 hours ago* (last edited 1 hour ago)

Thank you so much, Ada and Will. Appreciate the transparency! :3

To all curious, for the future: if you cannot go to your account on the Blåhaj instance or open up any stuff from there, check the desktop website of the instance, just go to lemmy.blahaj.zone (or its piefed equivalent).

Chances are, that there may be something on it. If you have an alt, I'd recommend one on an instance that's mutually federated with the Blåhaj one.

For changing passwords, your app may not support it - use the desktop environment.

Consider donating to the Blåhaj instance! (Put the donation spot in the sidebar too!)

Guess we now know where the database problems where coming from.

[–] mathemachristian@lemmy.blahaj.zone 5 points 6 hours ago (1 children)

Are IP addresses stored? And if so are they affected?

[–] ada@lemmy.blahaj.zone 7 points 6 hours ago (2 children)

It looks like IP addresses are stored in the DB in lemmy. It's possible that the attacker had access to those IPs, but we don't believe they accessed them.

This is the sort of thing we would turn off if we could :\

[–] florencia@lemmy.blahaj.zone 1 points 1 hour ago

I would like to bring up my onion service post from earlier https://lem.lemmy.blahaj.zone/post/22655537

Neither side of the connection knows the ip address.

I don't know anything about server management.

[–] mathemachristian@lemmy.blahaj.zone 4 points 5 hours ago (2 children)

I believe IP addresses are anonymized on hexbear although I dont know how it's done.

[–] ada@lemmy.blahaj.zone 4 points 5 hours ago

We could do that by direct DB manipulation.

[–] birdwing@lemmy.blahaj.zone 4 points 5 hours ago* (last edited 1 hour ago)

I just use a VPN. Paid one, but not one that's advertised everywhere.

[–] yoriaiko@lemmy.blahaj.zone 10 points 8 hours ago

Thx for resurrecting us back.

[–] cadmiumsandbox@lemmy.blahaj.zone 20 points 10 hours ago

thank you for all your hard work Kaity, Ada, and the rest of team, and for the transparency. even tho this was a horrible thing, the honesty and work makes me hopeful in a dark world. lots of love <333

[–] AbsolutelyNotAVelociraptor@piefed.social 134 points 15 hours ago* (last edited 14 hours ago) (1 children)

The feeling when a small hobby non-profit project gets hacked and the owners quickly respond to the users and say "hey, we got hacked but don't worry, your passwords are safe because they were encrypted!!"

But a damn multi-billion company gets hacked, takes months to tell the users and their answer is: "so... a few months ago, we got hacked, but it wasn't that bad so we didn't think about telling you until someone found our database for sale in a forum. Also, change your passwords, email, physical adress, bank account, credit cards and if you sent it to us, your SSN, because we didn't think it was important so it was all stored in a plain wordpad file without any encryption".

I know this must have been awful for you guys, but damn if it feels good to know that even if the fucker got access to your database, they couldn't do shit because you were competent and took measures to protect your users in a way a multi-billion company doesn't.

[–] southsamurai@sh.itjust.works 43 points 13 hours ago

See, this is why I respect the hell out of you Ada. Well, one of the reasons, because there are plenty more. But this is a perfect example of the kind of person you are, as well as the kind of admin. Transparency, rapid response, and you even opened up with an apology for someone else having screwed things up.

That goes for the entire blahaj team, but you are very much the face of it, and I just wanted to say something that I very often think, that we're all damn lucky you're here.

[–] Sunshine@piefed.ca 26 points 13 hours ago

Fingers crossed this gets sorted out, blahaj.zone is such a blessing.

[–] swizzle9144@lemmy.blahaj.zone 19 points 13 hours ago* (last edited 13 hours ago)

Thank you for your hard work and transparency, Blahaj Zone team!

[–] Vibi@lemmy.blahaj.zone 65 points 16 hours ago

Thank you 🫂 I've been through some disastrous code deployments, but I know those experiences could never truly compare to something like this- stress, fear, accountability, and just feeling violated. You all must have put in sooo much effort and had to make some difficult decisions. Thank you for all of your time and knowledge to creating and supporting this space for us 🩷

[–] SnotFlickerman@lemmy.blahaj.zone 28 points 15 hours ago* (last edited 15 hours ago)

Getting hacked is never an if, it's a when.

So sorry that you've had to shoulder all this. I really do hope you took breaks and didn't overwhelm yourselves. I understand remediating the hack itself quickly was important, but I hope you took a break and got good rest before you brought everything back online. Even in such a serious situation, I want to know my admins are still caring for themselves, too. It's hard to do this stuff on such a small scale when we have literal nation state actors doing hacks, it's a literal 24/7 threat.

Anyway, please be kind to yourselves. Thanks so much for all the hard work and bringing a beautiful community together.

[–] sixtoe@lemmy.blahaj.zone 15 points 14 hours ago (1 children)

Were your services containerized? Just curious. Systems architect here. Find me on LinkedIn. Curious if you need or want a hand. - Opal Wild

[–] ada@lemmy.blahaj.zone 10 points 13 hours ago (1 children)

Mostly no. Our smaller ones were.

[–] sixtoe@lemmy.blahaj.zone 3 points 11 hours ago (1 children)

Your passion project is community. You're doing well and good. Thank you for protecting me and protecting us. If you need, I'm free as in beer and sex. 💖🫶

[–] Sentau@discuss.tchncs.de 1 points 2 hours ago (1 children)

Slightly off topic but what is the exact meaning of the 'free as in sex' phrase? I know 'free as in speech' (which is ironic because speech is not that free nowadays) and 'free as in beer' but it is first time coming across the sex version.

[–] TechieDamien@lemmy.ml 2 points 1 hour ago

I suspect it is a reference to something Linus Torvalds said, something asking the lines of "software is like sex; it is better when it's free".

[–] BeanGoblin@lemmy.blahaj.zone 31 points 16 hours ago

Sounds like a real mess. It must be a lot of work running infrastructure like this, so you should know we appreciate all the work you guys do.

[–] kayzeekayzee@lemmy.blahaj.zone 33 points 16 hours ago

Thank you all for everything you're doing to keep users safe and the servers functional ~

[–] Zizzy@lemmy.blahaj.zone 31 points 16 hours ago

Thank you so much kaity and ada for everything you do and your moral integrity. I don't envy any of this.

[–] sharkweek@sopuli.xyz 14 points 14 hours ago

Fuuuuck.

Glad everything could be straightened out, but dog damnit that sounds like a shitload of work just because someone decided to be an asshole >:-(

[–] spidertrolled@lemmy.blahaj.zone 16 points 15 hours ago

o7 Admiring your tenacity, welcome back.

People wishing to manage their lemmy account should use the Lemmy UI (web) frontend.

[–] neuracnu@lemmy.blahaj.zone 17 points 15 hours ago

I've waded through my share of critical incidents and systems recoveries. The work can be deeply stressful and infuriating as you gradually uncover inevitable missteps, find the footprints of malicious actors and dream up countless hindsight mitigations that would have prevented all this.

Bless you, kind friends. I know how hard this is. Your work and diligence has value, and this entire community appreciates it.

[–] Catoblepas@lemmy.blahaj.zone 21 points 16 hours ago

Thank you both for working so hard to deal with this! I’ve changed my password, hopefully nothing more will come of it. I hope other instances are also on the lookout for this hack.

[–] enbee@lemmy.blahaj.zone 17 points 16 hours ago

Thank you for bringing my favorite source of memes back online. You two are much appreciated!

[–] Ioughttamow@fedia.io 8 points 14 hours ago

Ouch, that’s rough. Good work and good luck!

[–] Maeve@kbin.earth 10 points 15 hours ago

Oof! I'm really sorry that happened, to our blaj kindred. Hopefully everyone and everything successfully mitigates damage and restored to the fullest extent.

[–] florencia@lemmy.blahaj.zone 5 points 13 hours ago (1 children)

Status of Blahaj registration links?

[–] ada@lemmy.blahaj.zone 4 points 12 hours ago (1 children)

Can you give me some more details on what you've run in to?

[–] florencia@lemmy.blahaj.zone 1 points 1 hour ago

Just wondering if those links were exposed to the adversary? I know there is a statement on them when we received them telling us not to share them with anybody.

[–] BeardededSquidward@lemmy.blahaj.zone 7 points 14 hours ago (2 children)

This is a reminder from someone in IT with an interest in security, use discrete, unique passwords for accounts you are concerned about. Finance, health, banking, etc. use different passwords. For places you don't care about use a throw away only for those sites that don't have PII or HIPPA.

[–] birdwing@lemmy.blahaj.zone 2 points 7 hours ago

This, very much this!

[–] Serinus@lemmy.world 1 points 12 hours ago (1 children)

Use a password manager. Keepass if you're paranoid, Bitwarden if you're slightly less paranoid.

Idk how the built-in OS and browser ones are these days. Browser seems a little loose.

Browser ones aren't to be trusted. But yeah a password manager is pretty much a requirement at this point. Just make the master password hard to crack.

[–] Shadow@lemmy.ca 8 points 16 hours ago* (last edited 16 hours ago) (1 children)

Thanks for sharing all the technical details!

Did you have ssh keys configured between your machines, or is all of blahaj on a single server? (Wondering how they got from postgres -> root -> other servers)

[–] ada@lemmy.blahaj.zone 15 points 14 hours ago

We run our instances across multiple servers, but the postgres databases are all hosted together on a single server, though technically not a single server, as, at the time of the attack, we also hosted a backup database server, which was spec'd to backup our instances, but not serve them. Their access was limited to the main postgres server, but that server holds the databases for all of our instances. It looks like the script they used in the postgres exploit to give them local access interfered with the cleanup/backup process, so WOL files would get written, but not deleted, which filled up the disk on the main machine, and ultimately, caused it to fail over to the backup machine.

In theory, they could have used the same script/exploit on the backup machine, but because it wasn't spec'd to serve all of our instances at once, everything fell over at this point. That is what alerted us to the issue, and also limited the attackers available time in the system.