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Security vulnerability on Lemmy (slrpnk.net)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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As you might have heard several Lemmy instances have been attacked via a security vulnerability in the browser frontend related to custom emoji.

While SLRPNK was vulnerable to it, we seem to have not been actively targeted and I took the instance down as a precaution as soon as I learned about it.

I have applied all the currently known mitigations, which means that everyone got logged out of their account and needs to log back in manually.

As of writing this the API is working again and can be used with apps like Jerboa safely.

I am still contemplating if I want to re-enable the web frontend now or wait for a release that fixes the issues found.

Edit: the main issue was fixed and I restarted the web ui with it.

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

Hmm, yes that might be good. For now there is also my personal Fediverse account: https://outmo.de/kris but it runs on the same infra so if there is a more serious issue it will be down too.

But generally speaking if there are issues that effect more than slrpnk.net other Lemmy instances will also be down or at least talk about it.

I think the next step is to complete my plans for the infra that will allow easier access for external sysadmins so that we can reduce the bus factor. I'll keep you all posted when this will be possible.

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

Very nice, thank you for all your work!