Qualcomm Snapdragon X7 LTE-A

[Bjørn Mork]

Benoît <benoit at neviani.fr> writes:

> On Sat, Jan 07, 2017 at 12:53:21PM +0100, Aleksander Morgado wrote:
>>On Sat, Jan 7, 2017 at 10:44 AM, Benoît <benoit at neviani.fr> wrote:
>>> So I guess we support Sierra MC/EM7455 right ?
>>
>>Yes, those are supported by libqmi (and ModemManager, and libmbim when
>>in MBIM mode).
>
> Great :)
>
> Not related to my previous question but always got this question
> somewhere in my mind and always forgot to ask...
> Can we consider a better modem isolation when using libqmi against
> normal Windows drivers (even if I am not using Windows).
> I have heard that some modems have very bad modem isolation with the
> kernel and that be a potential leak/security issue so I am wondering
> if using a modem like the one I mentioned before could be a weak-point
> when I try to use only non-proprietary piece on my computer?

I don't know if you already saw this:
http://laforge.gnumonks.org/blog/20161230-33c3-presentation/

The situation is similar for any LTE modem.  Which means that there
isn't really much the host drivers can do to secure the system. The
modems are powerful systems by themselves, running a big binary firmware
blob you have no control over.  It doesn't really matter if it is based
on lots of GPL software either. The important central piece of it (the
"baseband") is binary only and based on unknown sources.


Bjørn