this post was submitted on 01 Mar 2024
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A security breach exposed two-factor authentication (2FA) codes/password reset links for millions of users on platforms like Facebook, Google, and TikTok.

Key Points:

  • YX International, an SMS routing company, left an internal database exposed online without a password.
  • The database contained one-time 2FA codes and password reset links for various tech giants.
  • YX International secured the database and claims to have "sealed the vulnerability."
  • The company wouldn't confirm how long the database was exposed or if anyone else accessed it.
  • Representatives from Meta, Google, and TikTok haven't commented yet.

Concerns:

  • This leak highlights the vulnerabilities of SMS-based 2FA compared to app-based methods.
  • The lack of information regarding the leak's duration and potential access by others raises concerns.

Gemini Recommendations:

  • Consider switching to app-based 2FA for increased security.
  • Be cautious of suspicious communications and avoid clicking unknown links.
  • Stay informed about potential security breaches affecting your online accounts.
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[–] wesker@lemmy.sdf.org 72 points 8 months ago (24 children)

It's a great recommendation to use app-based 2FA, except that lots of services seem to insist on and only offer SMS OTP.

For instance out of all the financial establishments I do business with, only one offers the option. The big name players don't, it's only some tiny little mom & pop CU that does.

It's very much a business adoption issue.

[–] ozymandias117@lemmy.world 42 points 8 months ago (2 children)

App-based is also unacceptable if it’s a proprietary implementation

TOTP/HOTP are the best standards right now

[–] wesker@lemmy.sdf.org 6 points 8 months ago (1 children)

I like a combo of Yubikey and Bitwarden, personally.

[–] ozymandias117@lemmy.world 11 points 8 months ago

Yeah, Yubikey fits - it implements TOTP/HOTP, and bitwarden is great

Just “app-based” worried me about apps rolling their own implementations instead of using standards

[–] rolling_resistance@lemmy.world 3 points 8 months ago (1 children)

Have you ever used HOTP before? Convenience-wise, it's much worse than TOTP. It's not supported by popular apps, you can't use it on several devices unless there's synchronization, you never know if the code you're looking at was used already.

[–] ozymandias117@lemmy.world 3 points 8 months ago

Yeah, it’s much less convenient. I prefer TOTP, but I will pick HOTP over Cisco Duo’s proprietary implementation that I can’t use without their specific app if those are my only options

[–] Poggervania@kbin.social 2 points 8 months ago (1 children)

Not sure if you do business with them, but Charles Schwab does have a app-based MFA option - although that’s limited to Symantec’s own TOTP MFA.

[–] wrekone@lemmyf.uk 3 points 8 months ago

A lot of sites say they only support one specific MFA app. But in my experience, any MFA app that can read the QR code will work.

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[–] scytale@lemm.ee 52 points 8 months ago (3 children)

It's infuriating that my bank still uses SMS 2FA.

[–] Zoidberg@lemm.ee 13 points 8 months ago

It's a circus out there...

One of my financial institutions supports yubikeys, but does not have the option to turn off sms 2fa. A chain is as strong as the weakest link, as usual.

Another only has sms 2fa and bizarrely allows me to specify any phone number at login time to receive the code. WTF?

Most only have 2fa via sms. When you talk about using an authenticator app people bitch and moan because they have to cut and paste those digits into the login page. Oh, the humanity...

Don't even get me started on sites with "roll your own" schemes, like forcing you to install their app (which requires all permissions under the sun) just to accept a push message and allow you to login on their website.

[–] Wes_Dev@lemmy.ml 6 points 8 months ago* (last edited 8 months ago) (3 children)

What if you don't have an Android or Apple smartphone, or refuse to get one on privacy concerns?

I know SMS isn't very secure, but how is one supposed to use 2FA if they can't, or won't, accept spyware to do so?

[–] DeadlineX@lemm.ee 6 points 8 months ago (2 children)

A lot of services now accept physical security keys for logging in. These keys use FIDO similar to how a phone-based passkey works. You just plug the dude in and then you are good to go.

Obviously not every company works with these just yet, but a lot of major companies do. Honestly most of the big tech companies support them.

GitHub and Bitwarden are the two I’m immediately thinking of, but that’s likely because I just used my passkey for those lol.

It’s way more secure than SMS MFA, and I prefer it to a phone app because I don’t have to look at then enter a code while hoping the time doesn’t run out for that code, forcing me to wait for a new one.

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[–] scytale@lemm.ee 5 points 8 months ago (1 children)

That's fine if you don't want to use a smartphone, but SMS should not be the only option available. They should provide multiple options for 2FA so customers can choose what they are comfortable with.

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[–] LastElemental@lemmy.world 4 points 8 months ago (3 children)

You can use TOTP 2FA on a browser too, there’s plugins for it. It’s not some super secret algorithm, smartphone apps are just the most common way of handling it. I suppose there’s progress to be made in terms of accessibility and education for the general public in terms of options for TOTP.

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[–] aphlamingphoenix@lemm.ee 4 points 8 months ago (3 children)

Mine uses SMS 2FA AND had a 16-character password limit. I need to switch banks already. Any suggestions for a decent bank or credit union that uses modern password cryptography and app-based TOTP?

[–] Dark_Arc@social.packetloss.gg 2 points 8 months ago

Well Capital One still uses SMS 2FA ... BUT if you're going to be using budget apps they allow OAuth which was the big selling point for me (i.e. not giving my bank account password to a third party)

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[–] miss_brainfarts@lemmy.blahaj.zone 50 points 8 months ago (4 children)

Aegis Authenticator, in case someone was wondering what to use

[–] MasterHound@lemmy.world 10 points 8 months ago* (last edited 8 months ago) (4 children)

I still use Authy, I know it's frowned upon in the privacy community but it's worked well enough for me so far. With them shutting down their desktop app though I see no reason not to switch to Aegis at some point in the near future. Just a pain in the backside setting it all up again as Authy doesn't let you export your 2FA.

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[–] ahriboy@lemmy.dbzer0.com 9 points 8 months ago* (last edited 8 months ago) (1 children)

For iOS, 2FAS, ente or Strongbox.

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[–] gapbetweenus@feddit.de 3 points 8 months ago (5 children)

I'm not that tech savy, so I was under the impression sms 2FA was the best way to go - why is app based authentication better?

[–] nekusoul@lemmy.nekusoul.de 23 points 8 months ago* (last edited 8 months ago) (3 children)

Someone already explained it, but here's a ranking of the different methods which are commonly used in terms of security, from bad to good:

  • No 2FA
  • SMS/Phone-based TOTP (TOTP = the normally 6 digit code)
  • App-based TOTP
  • Hardware-token-based TOTP
  • Hardware-token (Fido2/WebAuthn/Passkeys)
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[–] InEnduringGrowStrong@sh.itjust.works 13 points 8 months ago (1 children)

On top of all the other good answers, someone can also just SIM hijack your phone number by social engineering your phone provider into activating a new SIM card.
And it's usually much easier than one would think/hope.

[–] gapbetweenus@feddit.de 3 points 8 months ago (1 children)

I'm convinced, will switch to app authentication.

Make sure you backup your vault and/or keep the backup "paper codes" somewhere safe.
Aegis, for example, can automatically backup an encrypted vault.

[–] boatswain@infosec.pub 11 points 8 months ago (1 children)

SMS-based can be intercepted, while app-based are calculated on your phone. If you're using SMS -based, all someone needs to do is take over your phone, and they're getting your 2FA codes. Here's how easy that is: https://m.youtube.com/watch?v=lc7scxvKQOo

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[–] elxeno@lemm.ee 10 points 8 months ago (1 children)

Cause SMS is not encrypted, so your phone provider and any routing company like this one can read your texts, phone numbers can be spoofed (not sure about this one), or stolen via social engineering (someone calls your phone provider claiming it's you and u lost your phone or something, then gets access to your number).

There's probably a lot more issues with it, i don't remember them atm, but should be pretty easy to find with a search if you're still curious.

[–] FuryMaker@lemmy.world 3 points 8 months ago

Also, physical phone stolen, and the thief just pops the simcard out and puts it in another phone.

[–] kmartburrito@lemmy.world 4 points 8 months ago (1 children)

SMS 2fa has been recommended NOT to use since 2016.

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[–] theredhood@lemm.ee 2 points 8 months ago

I'm using ente auth also open source and decent.

[–] _number8_@lemmy.world 30 points 8 months ago (1 children)

oh so even this bullshit that's 20 times more annoying isn't secure? good good

[–] Passerby6497@lemmy.world 34 points 8 months ago (1 children)

it's sms 2fa, it was never secure. We've had reports of sms 2fa being bypassed for over a decade, but those were mostly sim swap attacks.

Unless your code is being generated locally, it's not secure. Email has the same problem because that can be hijacked to intercept the code. A hardware dongle or TOTP app are the only real secure options for 2fa IMHO.

[–] kmartburrito@lemmy.world 8 points 8 months ago* (last edited 8 months ago) (2 children)

Yep SMS two factor authentication usage was officially suggested to no longer utilize by NIST in 2016, and in practice before that, to your point.

This shit is old, people! It's trivial to compromise. Start transitioning where you can to passkeys and start using an app based MFA, like Duo or Authy, both free.

[–] atrielienz@lemmy.world 5 points 8 months ago

My bank literally said no. I asked about using a yubikee or something like Google authenticator and they literally said, enable a pass phrase. That's what they told me.

[–] Classy@sh.itjust.works 2 points 8 months ago

My stupid work app requires us to change our password every 6 months, no special characters so it's harder to use PW generators, and they don't even support 2FA. Nice that an app that stores my 401k and W-2 documents uses such amateur data security policy.

[–] Tronn4@lemmy.world 21 points 8 months ago

Oh boy! Can't wait to get another year of credit monitoring! /s

[–] Snapz@lemmy.world 6 points 8 months ago

Well at least they SEALED it and nobody captured the information when it was live because of course they did and you can't fix something like this after the damage is done.

DON'T WORRY EVERYONE!

[–] TheBat@lemmy.world 4 points 8 months ago (1 children)

Why tf Google is outsourcing security?

[–] Rednax@lemmy.world 16 points 8 months ago (5 children)

Google is not a mobile phone network provider. SMS routing is not really their cup of tea. It is an industry with lots of established players, lota of local issues, and little to gain for Google. If it where up to Google, everyone would be using their app instead of SMS.

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