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WARNING: Lemmy Self-Hosters, There Have Been CSAM Attacks taking place against !lemmyshitpost@lemmy.world (jamie.moe)

submitted 1 year ago* (last edited 1 year ago) by Jamie@jamie.moe to c/selfhosted@lemmy.world

162 comments fedilink hide all child comments

cross-posted from: https://jamie.moe/post/113630

There have been users spamming CSAM content in !lemmyshitpost@lemmy.world causing it to federate to other instances. If your instance is subscribed to this community, you should take action to rectify it immediately. I recommend performing a hard delete via command line on the server.

I deleted every image from the past 24 hours personally, using the following command: sudo find /srv/lemmy/example.com/volumes/pictrs/files -type f -ctime -1 -exec shred {} \;

Note: Your local jurisdiction may impose a duty to report or other obligations. Check with these, but always prioritize ensuring that the content does not continue to be served.

Update

Apparently the Lemmy Shitpost community is shut down as of now.

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[–] hitagi@ani.social 3 points 1 year ago

images hosted on the same server as the federated community will directly link

https://ani.social/post/288601 - This image is uploaded from a user on the same instance as the federated community (lemmy.world) but the image is cached.

images uploaded somewhere other than the federated community will be copied into cache

https://ani.social/post/285354 - This image is uploaded from a user on a different instance (lemm.ee) from the federated community (lemmy.world) but the image is not cached.

The behaviour is pretty weird. Hopefully we can disable image caching/copying-over-locally so we don't have to deal with problematic images hosted by other instances.