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Re: [Full-disclosure] Sniffing RFID ID's ( Physical Security )

To summarize the thread...

My question is:
Is it possible to sniff the data from RFID access control cards and write
the contents to a generic RFID card? Then use the copied RFID card to gain
access inside the target building?

This is more just theory at this point.

I have read about encryption used for credit cards and the more recent uses
for RFID.. but is any of this security built into your standard RFID access
cards implementations?

Out of a couple hundred companies I have visited I only remember a handful
that required an additional PIN to be entered. So if this is possible then
companies may want to look at their current installation.

JP
Packetfocus.com

On 6/27/06, Brate Sanders <brate_sanders@xxxxxxxxxxx> wrote:




----- Original Message ----
From: Josh L. Perrymon <joshuaperrymon@xxxxxxxxx>
To: full-disclosure@xxxxxxxxxxxxxxxxx; dailydave@xxxxxxxxxxxxxxxxxxxxx
Sent: Tuesday, 27 June, 2006 9:41:23 AM
Subject: [Full-disclosure] Sniffing RFID ID's ( Physical Security )

My ideas on RFID risk in its current implementation:
I'm thinking a lot of the risk with RFID would be within ID cards and
physical security. I have been in 100's of companies that use RFID ID cards
for physical security to access a building. Just rock up and swipe your
badge in front of the reader right???

What if an attacker was sitting at the cafe downstairs sniffing RFID (
Well, sending out RFID signals to power the chips and get a response ).
Wouldn't it be trivial to obtain the STATIC ID codes stored on the RFID
chips and write them to a generic chip? THis new card could easily be used
to walk right in  to the target company? As we all know.. once your inside
it's trivial to root the entire network.  Just insert your usb/ CD with an
autorun backdoor sploit connecting outside OR plug in a small wireless AP.

Go back down to the coffee shop and hack away.




I am sure RFID has a lot of issues and problems associated with it. But if
you can walk into a building do something and walk out to hack later, the
company has a lot of security issues it needs to handle before starting to
worry about securing their RFID access mechanism.

There may be some scenarios where a bad design or implementation is
causing a problem or data loss/theft. But what specific problem have you
seen or are concerned about? Or at least care to share the reasons for your
concern?




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