this post was submitted on 28 Aug 2023
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cross-posted from: https://jamie.moe/post/113630

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] 153 points 1 year ago (19 children)

Someone is trying really hard to hurt Lemmy by continually attacking the most popular instance. Is this all coming from right-wingers upset that their nazi instances were defederated across basically the whole fediverse?

[–] [email protected] 125 points 1 year ago (3 children)

The simplest explanation is 4chan types just doing it for the lulz.

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[–] [email protected] 58 points 1 year ago (7 children)

My tin foil hat is telling me it’s one of the other social media companies funding a hacking group to do it. They stand to have the most to lose, and they’ve seemingly decided to enjoy changing the narrative regarding multiple topics. Lemmy stands directly against what the bigger social medias stand for.

I have no evidence to back this though. As a business owner I just know that things become very consistent when people are being paid, and very inconsistent when they aren’t. These attacks are seemingly very consistent/organized.

[–] [email protected] 53 points 1 year ago (15 children)

You think a company that is posed to go public is going to attack a competitor with a minuscule amount of traffic with extremely illegal material that could put them in prison for even having?

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[–] [email protected] 21 points 1 year ago

You have a massively inflated view of Lemmy's importance in the social media market.

[–] [email protected] 18 points 1 year ago (2 children)

There must be room under that tinfoil hat for the both of us, because this was my first thought too.

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[–] [email protected] 116 points 1 year ago* (last edited 1 year ago) (2 children)

So, from memory there has been:

  • This recent attack
  • Regular DDOS attacks
  • Frequent attempts to spam community creation
  • That one time the instance got hacked and set to redirect to shock sites

Am I missing anything?

This seems like more than just a few trolls. Maybe someone really doesn't want to see user-owned social media take off.

[–] [email protected] 87 points 1 year ago (1 children)

I see where you're going with this, but no, people really are just absolutely horrible. The fact is that with other social media they're just already very set up in managing this so we never see it. Lemmy wants to be open, this is the flipside of that openness.

[–] [email protected] 21 points 1 year ago (4 children)

It's generally easy to crap on what's 'bad' about big players, while underestimating or undervaluing what they are doing right for product market fit.

A company like Meta puts hundreds of people in foreign nations through PTSD causing hell in order to moderate and keep clean their own networks.

While I hope that's not the solution that a community driven effort ends up with, it shows the breadth of the problems that can crop up with the product as it grows.

I think the community will overcome these issues and grow beyond it, but jerks trying to ruin things for everyone will always exist, and will always need to be protected against.

To say nothing for the far worse sorts behind the production and more typical distribution of such material, whom Lemmy will also likely eventually need to deal with more and more as the platform grows.

It's going to take time, and I wouldn't be surprised if the only way a federated social network eventually can exist is within onion routing or something, as at a certain point the difference in resources to protect against content litigation between a Meta and someone hosting a Lemmy server is impossible to equalize, and the privacy of hosts may need to be front and center.

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[–] [email protected] 38 points 1 year ago

It is very reminiscent of the trolls in the earlier web.

[–] [email protected] 70 points 1 year ago (1 children)

big F in chat for those of you dealing with this. my #1 fear about setting upand instance.

[–] [email protected] 44 points 1 year ago (2 children)

It impacts everyone when this shit happens. It takes time for mods/admins to take down. And you can’t unsee it.

I hope nobody else has the misfortune of stumbling on that shit

[–] [email protected] 42 points 1 year ago (4 children)

There have been studies which found playing tetris for an hour or two after seeing something traumatic can prevent it taking root in our longterm memory.

I tried it once after accidentally clicking a link on reddit that turned out to be gore, I can't remember exactly what it was now (about 9 months later) so it must have worked

[–] [email protected] 30 points 1 year ago (2 children)

This advice is a few hours too late for me. Hope it helps others

[–] [email protected] 18 points 1 year ago (1 children)

Don't worry, life with hold many more traumas

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[–] [email protected] 69 points 1 year ago (1 children)

Why do these deranged fucks do this

[–] [email protected] 20 points 1 year ago (3 children)

You really think the trolls would pass up on this golden opportunity?

[–] [email protected] 70 points 1 year ago (7 children)

This isn't trolling, this is just disgusting crime.

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[–] [email protected] 27 points 1 year ago

Archive.org gets crapped up this way, too. Repulsive people posting repulsive stuff, "troll" is too kind a word.

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[–] [email protected] 67 points 1 year ago

I literally am going to give up social media in general if this doesn't stop

Seen it last night late around 3am shit made me sick I honestly almost cried but I just closed the app and tried not to think about it

Whatever the goal is it's a stark reminder that there is monsters creeping in the shadows every where you go

[–] [email protected] 61 points 1 year ago (1 children)

Likely scum moves from reddit patriots to destroy or weaken the fediverse.

I remember when Murdoch hired that Israeli tech company in Haifa to find weaknesses is TV smart cards and then leaked it to destroy their market by flooding counterfit smart cards.

They are getting desperate along with those DDOS attacks.

[–] [email protected] 28 points 1 year ago (1 children)

Could be, but more likely it's just the result of having self hosted services, you have individuals exposing their own small servers to the wilderness of internet.

These trols also try constantly to post their crap to mainstream social media but they have it more difficult there. My guess is that they noticed lemmy is getting a big traction and has very poor media content control. Easy target.

Moderating media content is a difficult task and for sure centralized social media have better filters and actual humans in place to review content. Sadly, only big tech companies can pay for such infrastructure to moderate media content.

I don't see an easy way for federated servers to cope with this.

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[–] [email protected] 44 points 1 year ago* (last edited 1 year ago) (1 children)

I got lucky. I am not subscribed to this community, and I am the only person on my instance. But what if I was subscribed and hadn't seen this post? This is too much responsibility for me.

I just shut down my instance until we can disable cached images. If that never happens, then I'm not bringing it back up.

Shout-out to https://github.com/wescode/lemmy_migrate. I moved my subscriptions over in a minute or two, and now, other than not having my post history, it's exactly the same.

[–] [email protected] 18 points 1 year ago (3 children)

It is coming, don't worry.

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[–] [email protected] 42 points 1 year ago (8 children)

Yup. Nope.

Pictrs is just completely disabled now. Rather be safe, then sorry.

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[–] [email protected] 34 points 1 year ago* (last edited 1 year ago) (1 children)

How desperate to destroy Lemmy must you be to spam CSAM on communities and potentially get innocent people into trouble?

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[–] [email protected] 30 points 1 year ago (5 children)
[–] [email protected] 41 points 1 year ago* (last edited 1 year ago) (1 children)

Child sexual abuse material - underage porn. For obvious reasons, you don't want this to be something you're hosting automatically out of your basement server.

[–] [email protected] 26 points 1 year ago* (last edited 1 year ago) (8 children)

That's what I thought. Back in my days it was called CP.

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[–] [email protected] 29 points 1 year ago

i’d love for a good tech journalist to look into how and why this is happening and do a full write-up on it. come on ars, verge, vice

[–] [email protected] 25 points 1 year ago* (last edited 1 year ago)

Self hoster here, im nuking all of pictrs. People are sick. Luckily I did not see anything, however I was subscribed to the community.

  • Did a shred on my entire pictrs volume (all images ever):

sudo find /srv/lemmy/example.com/volumes/pictrs -type f -exec shred {} \;

  • Removed the pictrs config in lemmy.hjson

  • removed pictrs container from docker compose

Anything else I should to protect my instance, besides shutting down completely?

[–] [email protected] 20 points 1 year ago (3 children)

I went ahead and just deleted my entire pictrs cache and will definitely disable caching other servers images when it becomes available.

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[–] [email protected] 20 points 1 year ago (1 children)

To be clear, if no one on a given instance sub to that particular /c, the content won't federate to said instance, correct?

[–] [email protected] 17 points 1 year ago (1 children)

At this point, the community is clean. So unless more is posted, then you should be good. If someone searched for the community and caused a preview to load while the content was active though, then it could be an issue.

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[–] [email protected] 19 points 1 year ago

blocked lemmyshitpost some time age because it is trash anyway

[–] drcobaltjedi 18 points 1 year ago (2 children)

I was looking into self hosting. What can I do to avoid dealing with this? Can I not cache images? Would I get in legal trouble for being federated with an instance being spammed?

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[–] [email protected] 17 points 1 year ago (9 children)

I checked and there shouldn't be any images stored on the server when running lemmy 1.18.4. The post was made in high emotional distress and shouldn't be taken at a face value. If the posts are bothering you I advise purging the posts in question. (I have already done that)

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