From: Mister Coffee (live4java@stormcenter.net)
Date: Fri Jun 25 2004 - 11:30:50 EDT
On Wed, Jun 23, 2004 at 03:06:26PM -0400, Ng, Kenneth (US) wrote:
> Depends on how cheaply the unit was designed. I remember putting in back to
> back diodes on the front gates to protect against stuff like static
> discharge. If this was done, you would have to generate a HELL of a lot of
> EMF to blow these out. Time to bring out the van-de-graf generator :-).
> But in this era of cheaper cheaper cheaper, I bet these aren't there
> anymore. What will probably happen is you'll DOS the box. The AGC on the
> front end will try to cut the signal back as far as it can, probably not
> enough, the decoders won't see a clear signal/sequence, so will probably
> fail to engage. But I wouldn't be surprised if you burned out a front end.
>
<<much snipping>>
>
I'm incluned to agree that a low end unit will probably scatter parts if you hit it with enough power. Which, I suspect, would lead it to "fail closed", with the gate/door/what have you still locked.
As has been mentioned, simply jamming the thing would be a piece of cake. In the context of a pen-test, you could probably combine a Remote Door DOS with a bit of social engineering to gain entrance to a prem, if it was within the scope of your test.
Cheers,
L4J
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