[arch-general] FS#28008 - Bypass screensaver/locker program on xorg 1.11 and up

[Sébastien le Preste de Vauban]

El 20/01/12 04:10, Florian Pritz escribió:
> On 20.01.2012 02:18, David J. Haines wrote:
>> On Thu, Jan 19, 2012 at 8:08 PM, Tavian Barnes
>> <tavianator at tavianator.com>  wrote:
>>> On 19 January 2012 18:23, Dmitry Korzhevin<dkorzhevin at lsupport.net>  wrote:
>>>> a funny bug in the Xorg server that could allow attackers with physical
>>>> access to a machine to bypass the screensaver/screen locker program.
>>>> Most people use those programs to lock their computer when they are
>>>> away. On Gnome, gnome-screensaver is responsible for this. On KDE,
>>>> kscreenlocker is. There is a wide variety of smaller tools doing the
>>>> same thing, e.g. slock, slimlock, i3lock...
>>>>
>>>> Read more:
>>>> http://gu1.aeroxteam.fr/2012/01/19/bypass-screensaver-locker-program-xorg-111-and-up
>>>>
>>>> ctrl+atl+*(on num lock keyboard) confirmed and work in arch linux.
>>> IMO, it's not an X.Org or configuration bug, it's a bug in all the
>>> screen lockers.
>>>
>>> http://seclists.org/oss-sec/2012/q1/217
>>>
>>> --
>>> Tavian Barnes
>> No Happy Hacking Keyboard (1996 IBM Model M, baby!), but I do use a
>> custom keyboard layout that allows me to type international letters
>> and switch entirely to a phonetic Cyrillic layout.
> Please check if your custom layout contains the string "XF86_ClearGrab"
> (maybe also without the underscore) and if yes, replace it with
> "NoSymbol". Don't forget to reload it afterwards.
>
I did that and it solved the problem with the ctrl+atl+* key combo, but 
I realized that ctrl+atl+/ does the same thing =(
I attach my custom xkbcomp file.