this post was submitted on 10 Jul 2023
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FYI: Lemmy.world and other instances were hacked. Beehaw.org took itself down to mitigate risks (lemmy.world)
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
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Drawing attention on this instance so Admins are aware and can address the propagating exploit.

EDIT: Found more info about the patch.

A more thorough recap of the issue.

GitHub PR fixing the bug: https://github.com/LemmyNet/lemmy-ui/pull/1897/files

If your instance has custom emojis defined, this is exploitable everywhere Markdown is available. It is NOT restricted to admins, but can be used to steal an admin's JWT, which then lets the attacker get into that admin's account which can then spread the exploit further by putting it somewhere where it's rendered on every single page and then deface the site.

If your instance doesn't have any custom emojis, you are safe, the exploit requires custom emojis to trigger the bad code branch.

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[–] [email protected] 0 points 1 year ago (2 children)

And this is why you don't trust tankies. It's very easy to compromise the software and put back doors into it.

Use kbin instead.

And this is not me saying that this is a case of that, this is me saying that this could be the case in the future

[–] [email protected] 0 points 1 year ago

This is the dumbest possible take about the situation, my lord.

[–] [email protected] 0 points 1 year ago

Tbf, there are far more pressing reasons for distrusting Tankies... Instances getting hacked is for sure aggravating, but it isn't the gulag-backed paranoid ultra-corrupt authoritarian hellhole they so admire and wish to expand globally.

[–] [email protected] 0 points 1 year ago (1 children)

I’m greatly surprised how Lemmy and the fediverse society has responded with this. The bug was found yesterday, maybe? And I’ve read about it three, four times (in different servers); a temporal solution was published in hours and it’s already patched on the repo.

Another victory for Open Source and the Fediverse in general.

[–] [email protected] 0 points 1 year ago

This is what happens when the people running a platform actually care about it and it's users