Re: un-hibernating laptop using old network settings

["Erick B." <erickbe () yahoo com>]

Comments inline...

--- Andrew Daviel <andrew () andrew triumf ca> wrote:
> Recently a laptop brought onsite here from another
> site triggered
> an IDS alert.
>
> It seems the laptop was placed in hibernate mode at
> the other site then awakened on our network. It
> proceeded to use in-RAM
> network settings and sent a flurry of DNS requests
> to offsite servers.
> I believe it was running DHCP and don't fully
> understand how it was
> able to find the new gateway without changing the
> DNS settings too.
>
> Clearly laptops using static settings are going to
> use old values if
> the owner forgets, but I thought DHCP fixed that.

The laptop could learn its IP and gateway, etc via
DHCP but have DNS entries staticly configured. Maybe
this is what happened. 

> I have a feeling that there might be more subtle
> security issues
> relating to hibernating a system in a trusted
> environment and awakening it
> in an untrusted one, apart from user education
> issues, but can't put my
> finger on any just now.
>
> -- 
> Andrew Daviel, TRIUMF, Canada
> Tel. +1 (604) 222-7376
> security () triumf ca


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