Plex vulnerabilities being exploited in the wild to drop a cryptominer (boredhackerblog.info)

106 points by mindracer 8 hours ago

iamjackg an hour ago

Yeah, this happened to me the other day. I completely missed their "please upgrade now" email on Sep 1st and was running a 13 month old version. I got a notification that my home server was at 100% usage, and found the miner right away. At least they were nice enough to name the process "mylovelyminer."

coreyburnsdev 35 minutes ago

I find plex unusable since the latest UI updates in any place but my PC browser. It's so slow that Jellyfin is really my only option now. Did the vibe-code the new changes or what?

Loughla 3 minutes ago

It's not unusable on my shield but it's definitely worse. Not just 'change is bad' worse, but actually worse.

Selecting a season and then the episode gives you the episode summary instead of just playing the episode.

Hitting back on an episode brings up a side menu sometimes and others it leaves the episode like it should.

Why Plex?

whycome 28 minutes ago

There seems to be widespread disdain for it. AFAIK they switched to a shared codebase to make it easy for the devs to deploy to multiple devices. But, it came at the expense of UX for pretty much all devices. They don’t use native video services on things like iPhone.

gdulli 22 minutes ago

The new UI version never made it to the Xbox client so that's what I switched to using about 6 months ago. As a bonus, I got to ditch my Roku altogether.

foobarian 4 hours ago

> internet-facing Plex servers

This is terrifying. Who runs things like this open to the outside?

wolrah 3 hours ago

> This is terrifying. Who runs things like this open to the outside?

Probably the majority of people with a Plex Pass subscription and most Plex users in general.

As far as I see it, Plex's primary purpose is to allow people who have extensive collections of legally obtained digital media to conveniently access it and share access to their friends and family on pretty much any random device from anywhere in the world.

All my home media devices run Kodi, they run Jellyfin, they run all sorts of fully open stuff, but when I travel Plex wins because it runs on basically anything that can stream video and I can sign in to it in seconds without needing to connect a VPN or enter my password on someone else's device.

falkensmaize 3 hours ago

Plex in particular is notoriously insecure. It should never be accessible to the open internet unless via a vpn like WireGuard. Just playing with fire otherwise.

eddythompson80 2 hours ago

DaSHacka 2 hours ago

izacus 2 hours ago

wolrah 2 hours ago

walthamstow 3 hours ago

I don't think any more than 5% of Plex users are using it for legally-obtained content.

ppchain 2 hours ago

To be fair, this is Plex's intended use case. It is not a bizarre or unsupported config to expose Plex to the internet. It is designed to be on the network so that many different invited users can all log in and access your media. This model doesn't work if they all need to be on a tailnet or similar. Maybe Plex is less secure than nginx serving a web page, but its just a matter of a trust threshold.

If it were just me using Plex then it would be different, but I can't realistically expect all my friends and family to get on a tailnet, and so I take the risk with an up-to-date Plex on the internet.

dewey 4 hours ago

Many people, as your TV and sometimes friends have to connect to it and you don't want to explain Tailscale to them.

benoau 4 hours ago

You largely have to for Plex themselves to middleman access to your media collection.

doublepg23 3 hours ago

I'll fully admit I do.

The point of Plex is sharing your library with less ... technical users.

If I didn't want to do that, I'd not even use Jellyfin- SMB share and mpv would be fine with me.

blntechie 4 hours ago

I do run it open to the outside through cloudflare tunnels. I don't want to connect my TVs to tailscale every time to play a movie.

bigstrat2003 4 hours ago

I do. I like to stream music from my server onto my phone when I'm out and about. And it's authenticated, so there's nothing terrifying about exposing it (security vulnerabilities aside, but that can happen to any software you expose).

DaSHacka an hour ago

If it's only your own clients connecting to it, have you looked into Tailscale? Even as a selfhost-all-the-things type of guy, I've been convinced. This is exactly why I started experimenting with it too, due to Android now allowing multiple VPNs at the same time. It replaced my previous setup of hosting parts of my homelab technically exposed to the internet, which were only used by my phone since it already had an always-active mullvad.

thejazzman 3 hours ago

Feeling very validated that I went with Iroh @ https://pixelbrite.site

rumblefrog 3 hours ago

This is my first time hearing about Pixel Brite, what's the history behind it?

happytoexplain 3 hours ago

Essentially every technical person I know.

symlinkk 4 hours ago

Plex themselves literally recommend it and show a warning icon if it’s not accessible outside your local network. I always thought it was insane. To make matters worse their Synology package doesn’t auto update itself. I would guess there are a ton of vulnerable boxes sitting out there.

Orygin 3 hours ago

What get me the most, are the rabid Plex fanbois swearing that having jellyfin open on the internet is such a baaaad idea and you should spend ~50~ ~100~ 500 bucks for a sub to Plex which totally don't expose the same risk

NoMoreNicksLeft 2 hours ago

iAMkenough 3 hours ago

If you’re exposing anything on Synology to the Internet, you’re already playing with fire. Their packages (like Container Manager) are usually very far behind on security patches.

I think the current version of Docker engine Synology uses was end-of-life 2.5 years ago.

thenthenthen 3 hours ago

chrisweekly 3 hours ago

TacticalCoder 3 hours ago

> This is terrifying. Who runs things like this open to the outside?

A budy of mine has got 30 000 movies and series. Better offer than Netflix (what, easily 4x more choice!?). He's got a 42U rack. He gives free access to his server to his friends and family: it's not a business (so what he risks is also very limited in the country he lives in, for he's not making a business out of it).

It's not because you and I don't run Plex servers accessible from the big bad Internet that others don't enjoy doing it.

Now concerning this miner: I've posted about it in the past here on HN but I only run Jellyfin on my LAN and it's only with throwaway containers: I've got a script that sets up movies/series named/organized the way Jellyfin likes it, then that volume is passed read-only to a transient podman container.

When we're done watching the movie, the podman container is deleted. It's over: it doesn't exists anymore.

All that I care about are data: like family pictures and movies (and, say, other movies).

My Jellyfin server is just a temporary "view" on my actual data.

I don't trust it and don't need to trust it: for it's only future after I'm done watching the movie is to be destroyed.

mewse-hn 2 hours ago

I'm finding the idea of spawning then killing Jellyfin over and over again like Groundhog Day really funny

ImPostingOnHN 2 hours ago

Neat! So when you're on your tv stick or whatever, before deciding that you want to watch any movie in particular (so before the ephemeral jellyfin container is running), how does the movie selection process work?

And how did you set up the trigger to automatically spin up the ephemeral jellyfin container when a movie is selected?

Thanks!

xavdid 3 hours ago

I got hit with a cryptominer on my mac mini the other day. I only noticed because I happened to sitting in the room with it and noticed the fans were working overtime. There was a process, "icloud-services", which was using 100% of the CPU. It's sort of an indictment of Apple that my first inclination was "they've got a bug that's got an infinite loop" instead of "this is malicious software".

After a reboot, I traced it back to a folder in `Library/Application Support` which included a `config.json` that mentioned gulf[.]moneroocean[.]stream, so I knew I'd been popped. Cleanup was easy enough (the files themselves, plus the launch daemon), but it's annoying.

I don't do dev work on that machine (it's really just for plex & stuff) so it must have been some sort of vulnerability in Plex (but not the one described in OP) or macOS itself. Interestingly, I was up to date on my Plex install, but my macOS version was behind what was apparently an important security update related to an RCE (Sequoia 15.8).

whycome 27 minutes ago

Well damn. Here I was thinking I’m okay because Plex is up to date even if my OS isn’t…

2OEH8eoCRo0 5 hours ago

Reddit discussion here: https://www.reddit.com/r/PleX/comments/1x95krg/inthewild_exp...

Affects an older version of Plex and was patched in August.

TheCondor an hour ago

Did they start doing automatic updates?

I have a lifetime subscription, I use plex to share the media with the wife and kids on all of our devices, it does the job. I won't bitch about their streaming ambitions, but doing automatic updates and taking security seriously would go far for them.

eddythompson80 35 minutes ago

You can opt-in automatic updates. If you install the non-container package, you can set it to auto upgrade.

With containers it's a questionable/clunky implementation but possible. It only works in one flavor of their official image. On startup it will check if there is an update and download it and replace the application in the container. It breaks the point of containers obviously. It also only runs on startup, so you need to restart the container to get it to run.

peezd 42 minutes ago

Nope, at least not on the platform I'm on. Just get the popup when accessing media when there is an update and can automate it or schedule for evening, but no way to automatically update it.

HaloZero an hour ago

I don't think they force upgrade but it looks like the fix was part of 1.43.3 and my app is on 1.43.4