full-disclosure - [inbox] Breaking LoJack for Laptops

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Date: Wed Dec 28 15:01:18 2005
From: nocfed at gmail.com (nocfed)
Subject: [inbox] Breaking LoJack for Laptops

On 12/27/05, Michael Holstein <michael.holstein@...ohio.edu> wrote:
> > Don't a lot of systems include just this? Any system which supports
> > PXE boot can pretty much do all of the above from the BIOS.
>
> True, but Intel's PXE spec expects it to fetch the instructions from the
> TFTP server, and get all the details about what to fetch via DHCP. To do
> the "LoJack" trickery would require a very custom BIOS .. one that a
> laptop manafacturer would be pretty unlikley to provide to a software
> vendor, IMHO.
>
> ~Mike.
>

Would really need to implement this within the actual Firmware on the
NIC for it to be fully effective as bootp will just not work in a
non-bootp environment.  This could then send an innocent DNS query(or
whatever you so choose) to 'phone home' every 6-12 hours using the
information in buffer.  The single UDP packet would contain all of the
information needed and not need a reply of any kind.  The information
could be stored on-chip and would not need an OS to be booted into to
be effective.  So, as long as the machine has power and a network
connection... you get the picture.