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Date: Thu, 22 Aug 2019 20:33:54 +0100
From: Eddie Chapman <eddie@...k.net>
To: oss-security@...ts.openwall.com
Subject: Re: Linux kernel: multiple vulnerabilities in the USB
subsystem x2
On 22/08/2019 20:00, Perry E. Metzger wrote:
> You can argue anything you like. Power charging points have popped up
> around the world, and you're not in a position to stop
> them. Furthermore, I'll note that over the air exploitable bugs in
> things like WiFi stacks and Bluetooth stacks have also appeared over
> time; perhaps it's foolish to have your phone on at all, and yet
> people will continue to turn their phones on, and even to use them.
>
> Perry
Well, I certainly am not deluded enough to think I have the power to
stop power charging points popping up everywhere :-) Or to stop people
making mistakes. Just because something is possible and everyone else
does it doesn't make something less stupid.
It's a similar principle with wifi/bluetooth, which is why I avoid
connecting even to a family member's wifi access point unless it's
absolutely necessary. But USB is a physical interface directly into a
device's circuitry, I think that carries more risk than radio. ok, usb
2.0 is only 2 x power and 2 x data, but radio waves are at least
filtered somewhat after hitting an antenna. Physical interfaces on a
device, on the other hand, the circuit designer does not usually design
them "defensively" (apart from e.g. fuses on the power lines).
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