Cybersecurity

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Signal under fire for storing encryption keys in plaintext (stackdiary.com)

submitted 4 months ago by kid@sh.itjust.works to c/cybersecurity@sh.itjust.works

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[–] uhh_matt@sh.itjust.works 31 points 4 months ago (2 children)

Ah yes, the old "your data isn't safe when an attacker has full access to your pc account" vulnerability

[–] Sethayy@sh.itjust.works 9 points 4 months ago (1 children)

Yeah fuck security in layers, my first layer is 100% bulletproof so I got no reason to worry

[–] BearOfaTime@lemm.ee 3 points 4 months ago* (last edited 4 months ago) (1 children)

Exactly, which is why your drives should be encrypted.

Once you lose physical control of a device, all bets are off, drive encryption at least slows down attackers significantly.

I have far more sensitive, and a greater volume of data, on the drive than just comms.

[–] Sethayy@sh.itjust.works 4 points 4 months ago* (last edited 4 months ago) (2 children)

Drive encryption wouldn't do anything to mitigate this though? A process running on your PC needs access to your drive, and so with the current setup you have either the option to trust 100% every software with your signal encryption keys, or to simply not use them.

Seems like a pretty big security flaw that we have actual solutions to.

You could maybe form a hackey way to allow only the signal process to an encrypted FUSE filesystem that decrypts its own keys on the fly, but again there's already ways to do this in software that isn't like using a wrench to plug a leak. (and this setup would just have it's own set of keys that need to be protected now, probably by a traditional method like kwallet)

[–] douglasg14b@programming.dev 2 points 4 months ago (1 children)

I mean... Every serious operating system already has some form of keyring feature right?

[–] Sethayy@sh.itjust.works 4 points 4 months ago

Ie. what signal should be using, yet isnt

[–] sun_is_ra@sh.itjust.works 1 points 4 months ago (1 children)

there is SELinux which give more fine tuned permissions for each app but it was too complicated for me

[–] Sethayy@sh.itjust.works 2 points 4 months ago

And if you're using SELinux as a kwallet/keyring replacement, you're using it wrong (but again security in layers doesn't stop you from using both)

[–] douglasg14b@programming.dev 2 points 4 months ago

Not necessarily. There are many paths to exfiltrated data that don't require privileged access, and can be exploited through vulnerabilities in other applications.