Cybersecurity

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WhatsApp, Signal, untraceable security risk (www.techradar.com)

submitted 10 hours ago by Spot@startrek.website to c/cybersecurity@sh.itjust.works

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Three billion WhatsApp users are at risk - an expert has developed a tool that could spy on everyone, and you would never know about it

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[–] pcouy@lemmy.pierre-couy.fr 1 points 3 hours ago

I believe Signal has already fixed it, while meta said they won't fix this in WhatsApp.

This side channel can be used to infer more than a rough timezone, specifically, an attacker could continuously monitor :

the number of devices linked to the target’s account, along with fingerprints that allow differentiation between operating systems and browsers
the locked or unlocked state of the target’s phone
whether the phone is connected via Wi-Fi or a mobile network
whether the WhatsApp application or browser tab is running in the foreground or background.

In addition, an attacker could deliberately drain the target’s phone battery and consume their mobile data allowance

I've tested this on myself and can confirm all of this can be done reliably