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submitted 11 months ago* (last edited 11 months ago) by dcx to c/announcements

Update: Federation and community creation are now back online!

Hey all, there's a hack floating around which spreads via federated comments and steals users' Lemmy auth tokens. Lemmy.world and other large instances have been hacked, so we're taking some precautions until this is fixed:

  • We're logging everyone out so that auth tokens reset
  • We're closing off federation and community creation until this is patched

FYI, there are no indications that anyone on our instance has been hacked. We did find ten comments with the code injection attack, which we've now scrubbed. But it's very unlikely that this will cause harm at this stage. There are several steps between this and hacking the entire instance. (Also FYI for nontechnical users, the hack affected Lemmy logins and nothing else. Web browsers run all websites in a kind of "jail")

Sorry for the inconvenience – growing pains. Updates to come as we learn more!

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[-] piece_of_cake 2 points 11 months ago

Thank you. I was bewildered by the earlier announcement but you have laid it out a lot clearer here.

[-] dcx 1 points 11 months ago

Sorry about that, it took us a while to figure out what was going on!

At the end of the day we're a community project, not a commercial one, so we don't have full time sysadmin hands on deck 24/7 etc. (But ultimately I think this is totally fine for what we are! And ultimately non-commercial is more sustainable for online communities IMO)

[-] Annoyed_Crabby 1 points 11 months ago

I'm sorry if my statement cause you any confusion (シ_ _)シ

[-] aerir 1 points 11 months ago

No wonder I couldn't see the posts from here today from my instance. Anyway RC2 is out, which should fix this XSS vulnerability

[-] ruk_n_rul 1 points 11 months ago

Ah, didn't realize there's a site sticky. Sorry about the other post. Everyone pening dealing with this ig. Sucks to not be on PC.

Still not sure if comments loaded from other instances with custom emoji (the vector of this exploit) can trigger the exploit here, but since we defederated there shouldn't be a way for it to get in, I hope.

[-] dcx 1 points 11 months ago

No problemo. Seriously, thanks for the concern! And yeah we think we're as safe as we can make us for the time being.

this post was submitted on 10 Jul 2023
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