full-disclosure - Hackers View Visa/MasterCard Accounts

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From: jasonc at science.org (Jason Coombs)
Subject: Hackers View Visa/MasterCard Accounts

AVS gives the merchant a clue as to whether or not there is high risk posed
by a particular alleged-customer.

Merchants are free to ignore AVS, and many don't even bother to use it.

Anyway, it doesn't impact the "declined" or "authorized" result given to a
shopper at an e-commerce site that implements real-time processing.

Jason Coombs
jasonc@...ence.org

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com]On Behalf Of Richard M.
Smith
Sent: Tuesday, February 18, 2003 5:30 AM
To: full-disclosure@...ts.netsys.com
Subject: RE: [Full-Disclosure] Hackers View Visa/MasterCard Accounts

Wouldn't the AVS system used by the credit card companies catch this
kind of hack?  The AVS system does a rudimentary check to make sure that
the billing address given on a order is correct one for the credit card.

Richard