I think for a while leading up to the recent session stealing hack, there has been a massive amount of positivity from Lemmy users around all kinds of new Lemmy apps, frontends, and tools that have been popping up lately.
Positivity is great, but please be aware that basically all of these things work by asking for complete access to your account. When you enter your Lemmy password into any third party tool, they are not just getting access to your session (which is what was stolen from some users during the recent hack), they also get the ability to generate more sessions in the future without your knowledge. This means that even if an admin resets all sessions and kicks all users out, anybody with your password can of course still take over your account!
This isn’t to say that any current Lemmy app developers are for sure out to get you, but at this point, it’s quite clear that there are malicious folks out there. Creating a Lemmy app seems like a completely easy vector to attack users right now, considering how trusting everybody has been. So please be careful about what code you run on your devices, and who you trust with your credentials!
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How many password managers have you been trying out this week?
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This is why password managers are so heavily pushed. Imagine if you used the same password for Lemmy that you used for your email? Both are now compromised. A unique password for all accounts is the bare minimum you must do.
Although it is worth noting that the recent Lemmy hack didn’t come from a password compromise, but from session token harvesting, which a password change would not really protect against.
Forgive me if I’m mistaken, but wouldn’t logging out of the compromised session be all it would take to end the attack in this case?
Only if logging out actively invalidates session tokens, which appears to have not been the case. https://github.com/LemmyNet/lemmy/issues/3364
Lol this is not how the hack worked. JWT cookies are encrypted. They don’t contain your password at all. There was no way to reverse engineer from your cookie to your password.
Correct me if I’m wrong, but Lemmys tokens have no expiration, right? So they are effectively username and password combined.
The decoding algorithm can change, which is exactly what happened, invalidating all previously generated tokens. They cannot be decoded to a password though since they are encrypted, meaning shared passwords wouldn’t be an issue (though you should use a password manager to not have this issue in the first place).
That’s not how tokens work. Tokens are (usually short-lived) credentials that are passed to a client after it authenticated e.g. with username + password. But the password is never contained in a token. They are also not encrypted, but signed, meaning the Lemmy instance can verify that the plain-text token ist authentic. Also, not the decoding algorithm has changed, but the signing key was rotated, meaning all JWTs created before the signing key rotation would not look authentic anymore
Right. I was simplifying it by saying it was encrypted, but it’s just an auth token from the service after verifying that the user is authenticated.
And correct. I’m just an idiot and didn’t do research to explain it, even though I’ve used JWT tokens in my applications before. Hahaha. Thanks for the detailed correction!
I literally just got one last week. It’s so nice! I guess I was hesitant because centralized passwords always put me off, but it’s not hard to setup 2FA on all your important stuff.
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Sorry, but that’s literally every online service. For example if you buy a new virtual server it takes like 5 minutes till a Chinese IP starts to try root passwords.
If someone actually wanted to harm Lemmy they’d just DDOS the biggest instances for a month (which would be easy, it’s mostly single servers after all) or attack it with so much spam and large images that storage would break.
We need moderation tools
Here’s hoping Sync and Boost lead the way
Here’s hoping Sync and Boost lead the way
Or better yet, let’s hope Free Software apps lead the way and ditch the proprietary ones.
Well, Sync and Boost were well established already. It’s probably gonna take some time for the new foss ones to catch up
I’m getting CS-nerd excited about how this is all going to play out. Federated moderation is hard and so many awful, clunky things have been tried before. Are we actually going to see a web-of-trust or reputation system that reaches widespread adoption? It’s gotta be silent and noninteractive as there’s no way to expect normal people to put up with the complexity.
The difference is that when you buy a vps you aren’t handing over all your access creds to random developers.
And “harming lemmy” may be an intent that sparks a DDoS but there are other intentions that should make users wary. Harvesting creds of people who reuse passwords across accounts is an easy example that could have more serious implications to the individual user.
Dude, you can’t trust any Lemmy instance at all. It doesn’t even matter that the code is open source, the instance owner could just compile their own version that sends them every password in plaintext. There is zero guarantee that your password is safe.
Anyone who reuses passwords has been pwned a dozen times already. Just check your own logins here: https://haveibeenpwned.com/
If you reuse passwords online you have a problem, it’s simple as that. Even big companies had breaches that leaked user data, no company is safe. For example one of my old passwords got stolen from Adobe. One from Unreal Engine. And my old logins are currently shared in 2,844 separate data breaches. Not using a password manager with a random password per service nowadays is madness.
Using open source apps, especially with more than one contributor, is currently the best option to be safe from this kind of attack.
Edit: I’m not saying that FOSS is 100% secure because it’s FOSS. I’m just saying it’s the best option we currently have.
It helps, but it’s still not a silver bullet. For example, a Lemmy app could contain no malicious code in its open source repository, but malicious code could still be added to a binary release in an app store.
Voyager (formerly wefwef) is a self-hostable web app, so it doesn’t have this problem. Of course this only means you can inspect the code you’re running. You still have to able to understand the code to be sure it’s not doing anything malicious.
Vojager can be easily modified and deployed. It is actually quite riskier than others if you don’t use trusted deployments
A random deployment is certainly risky, but no riskier than a random apk. I’d argue the random deployment is less risky because it’s easier to inspect it in the browser and see what it’s doing with your password. But of course both are to avoid. Self-hosting or compiling your own clients if you can, official deployments or releases otherwise.
That’s why F-Droid is the safest Android app repository. If I’m not mistaken, every app they offer is rebuilt from the public source code by the repo package maintainer.
Also if it’s a desktop app they could just put the malicious code in the binary download 99% of people will use, or if it’s a web app, they just put it in their hosted version, etc.
Yeah, downloading from fdroid or izzyondroid kinda solves that.
Izzy directly sends over the APKs from GitHub releases. F-Droid does their own builds which is partly why they’re so slow to update.
I know?
both have my trust in not messing with the files.
The safest option would be for Lemmy to implement OAuth and apps that aren’t in some “official front end for xyz website mode” to authorize via OAuth with the backend instead of via credentials.
Most if not all Mastodon/Pleroma apps already use OAuth by default. I’m surprised that Lemmy hasn’t implemented it yet. I wonder if KBin does already?
No, because open source apps need to have enough eyes on them to spot malicious code. And highly complex ones need proper audits and even that might not be enough to catch every fancy vulnerability.
I doubt a malicious actor would open source their app tho
That’s fair, but sometimes a malicious actor will attempt to covertly contribute code that introduces a security vulnerability.
It has happened before. Or somewhat more likely, a contributor provides code that the maintainer merges without looking too hard.
lgtm
How can an idiot like me tell though, everything is pretty new. I just assume every account I make is a throwaway for now.
Well I recommend to stay away from any closed source apps. Also make sure your password is unique to lemmy and use an email address that is not your primary email.
Be careful of clicking links and DMs.
Well I recommend to stay away from any closed source apps. Also make sure your password is unique to lemmy and use an email address that is not your primary email.
Be careful of clicking links and DMs. If using the browser use noscript and block scripts by default.
OSS does not guarantee security, ever. Please let’s not fall into false sense of security.I
But in this case, if an app is open source, there is a higher chance of discovering that it sends your credentials somewhere else than in closed source app
That assumes people are looking at that and know what they’re doing and aren’t malicious actors. None of this is guaranteed. Famous examples of major OSS security vulnerabilities have already shown this.
Oauth2 login support for apps would certainly be very welcome.
I really want this. I haven’t tried any of the apps (other than the one I made) yet because I don’t want to give anyone my password. Oauth support would be so nice.
My lemmy account is made with a throwaway email and with a randomly generated password just in case it ever gets leaked
I didn’t even attach an email to mine.
Same, I was on world when it got hacked, rotated the simple login email, and rotated the password post hack (and deactivated the old email) just to be on the safe side.
Mine is just my porn email, so good luck hackers
Thanks for the heads up. My password is %f22N$CBTNgW, can you let me know if it was leaked?
pls also check
hunter2What is it? I only see ******. I think Lemmy is hiding personal info now.
I’ll keep an eye out 👀
Pretty funny but if you enter you actual password it will hide it. My pass is ************, which should show up as asterisks for you.
Try it out. Pretty cool security feature honestly.
hunter2
We need your full name, date of birth and zip code to check
I’ll make sure to let you know if I see it anywhere.
I am using the Liftoff app. It looks pretty safe but I don’t really know.
It’s open source and pretty popular (for a Lemmy app at least) so it should be pretty safe
Are there any known apps that should be avoided? I’m using Mlem and Memmy.
Not yet, this post is just a warning that it might happen
Not sure about the other apps, but Memmy keeps your password stored in the app. But generally speaking I don’t think Gavin is a malicious person. He spent 3 weeks with beta tests before he was even comfortable pushing it to Apple App Store and the code is reviewed by Apple before being included to watch for malicious scripting. I am not saying people don’t get malicious scripts passed through Apple, but from what I have seen of Gavin’s work, he doesn’t seem the type that would do that.
Closed source ones.
It’s not about any specific app.
They are just using many words to say ‘remember logging in on these apps means giving them your full username/password.’
We really need a better way to log in from 3rd parties. It’d be nice if we could crowd fund features, I’d def pay up for some sort of app-password system or other
I agree with this completely.
Obviously you should only input account credentials into an app you trust, but shouldn’t a properly designed Lemmy app not store the credentials in plain text at all? (And definitely never send them somewhere else) Authorize the user through the API and then it’s just an authenticated session, no need to store the username/password at all until you sign out.
I suppose if you have fast user switching it might need to store it. Hmmmm.
Indeed, this is a real weak spot with Lemmy’s security. I honestly think we need to place more emphasis on implementing OAuth2, when I have the time I’ll have to take a look at that again to see if I’m able to.
1password is probably the most valuable subscription I pay for.
If anyone’s looking for a free and open source option, Bitwarden is also great.
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I think their point is password managers make it very easy to have completely unique passwords, and if your Lemmy password is compromised you can change it without worrying about any other accounts being compromised. Not that a manager would magically protect you from ever being compromised.
I think you misunderstood us lol… we’re not saying your password will not get leaked by the app… we’re saying it’s gonna be unique and random bullshit generated so the hacker won’t be able to get to your other accounts since passwords are different.
You’re correct, but by maintaining distinct passwords with a password manager you make sure only the one account is compromised. 2FA also helps, you may have the username and password, but the 2FA code that you were given needs to be used immediately or else it will expire, and an expired 2FA code won’t allow you to successfully breach the account you’re trying to break into to.
KeePassXC is free and completely offline
And if you want it to be online, you can just share your .kdbx file between your computers using Syncthing or whatever.
Also Password Store! Syncs over Git and on Android you can use a Yubikey so that the private key isn’t even on your phone.
But yes, KeePassXC is way more user friendly. Anything touching PGP/GPG is an automatic red flag for family.
Me reading this post on an alpha app on testflight: chuckles I’m in danger.
Kidding aside, I used a dedicated email (and password) for my account and don’t plan to post any personal info on here.
Thanks for this!!
I feel like it raises somewhat the general issue of how much we’re willing to live with complete mysterious anonymity from all of the developers and admins in the fediverse. I’m not saying that every admin or developer should have their real identity revealed and linked here. But there’s a tension or issue here in how much it’s normal and accepted and how much the fediverse in general wants to grow and attract users that are accustomed to trusting large companies that provide a different kind of base level trustworthiness than makes sense “out here”.
If not links to real life identities (however trustworthy that can be in the limit), at least some connection to a broader online presence such that it becomes more likely the actor has something to lose in acting in bad faith (the lemmy core devs being a good example).
I don’t have a solution … but it seems to be a growing pain as this whole thing kind of grows from “hacker project” to “mainstream social media”.
The solution has been the same for the last 20 years: Use a password manager, do not reuse passwords. That’s it, you’re done.
Even if the Lemmy instance admin steals your password (which would be easy!) they can’t do anything with it.
What about the app Memmy for iPhone ?
Preface: I have no opinion. Have not installed, and will not install because I don’t need it.
If you have to ask, it’s probably worth investigating further.
The first thing I would do is search around for any mention of the app name and variants on the word “password”.
Never install anything that you don’t trust, and dissociate from your “real” email/identity for those that you aren’t sure about. Whoever owns the software potentially owns your credentials.
Memmy is good!
I don’t think this one is going to fall in the “malicious” category.
It’s on the iOS App Store, so I’m under the impression that a code review would’ve snuffed that out.
Apple doesn’t review it that thoroughly. They could easily send people’s credentials up to some server and Apple would likely not catch it.
What I mean is don’t just trust it because it’s in the App Store.
I personally use it because it has an active GitHub and is one of the more popular mobile clients. Also I don’t really care if my accounts get hacked in the first place lol so I’m also trying out Mlem beta and Wefwef. But even with that said I wouldn’t just try out any random new client that came along.
It’s not about any specific app.
They are just using many words to say ‘remember logging in on these apps means giving them your full username/password.’
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It does indeed, Bitwarden is open source and selfhostable tho :)
Trying to break Lemmy, yeah, let’s prosecuted those bastards, but… WHAT. COULD. BE. MORE. WORTHLESS. than my account?
You are welcome to the scintillating points I have made. Bask in their brilliance.
