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Hackers can steal 2FA codes and private messages from Android phones (arstechnica.com)

submitted 1 week ago by along_the_road@beehaw.org to c/technology@beehaw.org

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[–] thingsiplay@beehaw.org 20 points 1 week ago (4 children)

Pixnapping attacks begin with the malicious app invoking Android programming interfaces that cause the authenticator or other targeted apps to send sensitive information to the device screen. The malicious app then runs graphical operations on individual pixels of interest to the attacker. Pixnapping then exploits a side channel that allows the malicious app to map the pixels at those coordinates to letters, numbers, or shapes.

It works like screenshotting the 2FA tool. It's an Android issue.

Little bit off-topic: Linux PC

BTW this is a reminder why we need a secure Wayland solution on our desktop Linux PC. Because this sort of stealing under X11 is possible too.

[–] Midnitte@beehaw.org 4 points 1 week ago (2 children)

Authenticator app just needs to implement FLAG_SECURE, no?

Seems more like an app dev issue

[–] jherazob@beehaw.org 4 points 1 week ago (1 children)

Looks like this works regardless of that

[–] Midnitte@beehaw.org 4 points 1 week ago

Looks like you might be right - though I imagine disabling the ability to draw over apps with that security flag in place would do a lot to mitigate... but... im also not a security researcher

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