linux-kernel - Re: Ubuntu RT2X00 WIFI USB Driver Kernel NULL pointer Dereference&Use-After-Free Vulnerability

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Message-ID: <2024080557-mouse-overload-bb56@gregkh>
Date: Mon, 5 Aug 2024 08:55:10 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: LidongLI <wirelessdonghack@...il.com>
Cc: kvalo@...nel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-wireless@...r.kernel.org,
	mark.esler@...onical.com, stf_xl@...pl
Subject: Re: Ubuntu RT2X00 WIFI USB Driver Kernel NULL pointer
 Dereference&Use-After-Free Vulnerability

On Mon, Aug 05, 2024 at 10:20:30AM +0800, LidongLI wrote:
> Hi Greg,
> 
> We tried it, and after configuring the udev rules, I can run the proof of concept (PoC) and reproduce the previous issue without using sudo
> 

What did you do exactly with a new udev rule?  Did you give it userspace
permission to unbind/reset the device?

As it is today, this requires root permissions and it looks to just be a
race with the existing kernel driver setting the device up and userspace
trying to reset the device at the same time, not anything that can
normally happen in a system from what I can tell.

thanks,

greg k-h