full-disclosure - Hackers View Visa/MasterCard Accounts

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Message-ID: <005401c2d762$9721b250$6401a8c0@rms2>
From: rms at computerbytesman.com (Richard M. Smith)
Subject: 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

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com] On Behalf Of Jason
Coombs
Sent: Tuesday, February 18, 2003 4:29 AM
To: full-disclosure@...ts.netsys.com
Subject: [Full-Disclosure] Hackers View Visa/MasterCard Accounts

So, anyone know whether this was a simple "real-time credit card
processing
oracle" attack where a tool throws fake orders at sites that provide
real-time credit card authorizations until a valid card number and
expiration date are found?

Any third-grader with a copy of Microsoft .NET or Java 2 class libraries
could whip up the code needed to bang away at the typical e-commerce
site
logging rejected orders due to invalid credit card payment and revealing
card numbers and expiration dates that can be used for fraud in a
variety of
ways.

There must be such credit card "hacking" tools circulating for the
benefit
of script kiddies -- anyone looked into this before? If so, will you
share
some references?

Jason Coombs
jasonc@...ence.org

--

Hackers View Visa/MasterCard Accounts

Mon February 17, 2003 11:17 PM ET

NEW YORK (Reuters) - More than five million Visa and MasterCard accounts
throughout the nation were accessed after the computer system at a third
party processor was hacked into, according to representatives for the
card
associations.

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