mailing list archives
Re: Cisco, haven't we learned anything? (technician reset)y
From: Martin Hannigan <hannigan () world std com>
Date: Thu, 12 Jan 2006 21:41:18 -0500 (EST)
On Thu, 2006-01-12 at 21:05:52 -0500, Steven M. Bellovin proclaimed...
How much entropy is there in a such a serial number? Little enough
that it can be brute-forced by someone who knows the pattern? Using
some function of the serial number and a vendor-known secret key is
better -- until, of course, that "secret" leaks. (Anyone remember how
telephone credit card number verification worked before they could do
full real-time validation? The Phone Company took a 10-digit phone
number and calculated four extra digits, based on that year's secret.
Guess how well that secret was kept....)
I believe the Netscreen default password of a serial number can only be
entered over the console (and possibly modem/aux) port(s).
Yes. Sorry, I left that out.
Re: Cisco, haven't we learned anything? (technician reset) Gadi Evron (Jan 12)
Re: Cisco, haven't we learned anything? (technician reset) Fergie (Jan 12)
- Re: Cisco, haven't we learned anything? (technician reset), (continued)