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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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WARNING: Lemmy Self-Hosters, There Have Been CSAM Attacks taking place against [email protected] (jamie.moe)

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

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There have been users spamming CSAM content in [email protected] 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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[–] [email protected] 3 points 1 year ago (2 children)

Would rm be okay if you regularly fstrim?

[–] alanceil 4 points 1 year ago* (last edited 1 year ago) (1 children)

No, fstrim just tells your drive it doesn't need to care about existing data when writing over it. Depending on your drive, direct access to the flash chips might still reveal the original data.

If you want ensure data deletion, as OP said, you'll need to zero out the whole drive and then fstrim to regain performance. Also see ATA Secure Erase. Some drives encrypt by default and have Secure Erase generate a new key. That will disable access to the old data without having to touch every bit.

[–] [email protected] 2 points 1 year ago

TRIM tells the SSD to mark an LBA region as invalid and subsequent reads on the region will not return any meaningful data. For a very brief time, the data could still reside on the flash internally. However, after the TRIM command is issued and garbage collection has taken place, it is highly unlikely that even a forensic scientist would be able to recover the data.

From: https://en.m.wikipedia.org/wiki/Trim_(computing)#Operation

So: probably yes.