Bugtraq mailing list archives
RE: Defeating Citibank Virtual Keyboard protection using screenshot method
From: "Rogier Mulhuijzen" <rogier.mulhuijzen () office casema nl>
Date: Wed, 16 May 2007 10:49:50 +0200
Seth wrote:
What is included in the "signed" stuff, and when is that challenge/response done?
The Challenge/Response is done when you log in and for transactions.
If malware is running on the user's computer, can it change the destination of a funds transfer invisibly to the user, and still have the verification work? That is, user enters "Pay 100 to Credit Card". The malware sends the bank "Pay 100 to Bad Guy". The bank tells the user "Verify transfer of 100 from your account". Oops.
The account number you're sending to is used in making the challenge. So if you were to change the account number, the user would surely notice that suddenly the challenge isn't matching the account number. Imipak wrote:
Something like this? http://business.guardian.co.uk/story/0,,2077984,00.html
"Account holders at Barclays, NatWest and Nationwide will be given a calculator-style gadget which, once they insert their debit card, will produce a randomly generated number which they will have to key in as well as their usual passwords and identification numbers." That sounds like what we (ABNAMRO customers) have. Except that we enter the challenge on the device as well. Cheers, Rogier This e-mail message and its attachments are subject to the disclaimer published at the following website of Casema: http://www.casema.nl/disclaimer
Current thread:
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method, (continued)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Rogier Mulhuijzen (May 10)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Nick FitzGerald (May 11)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Omar A. Herrera (May 11)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Hugo van der Kooij (May 12)
- Re: Defeating Citibank Virtual Keyboard protection using screenshot method Seth (May 15)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Glynn Clements (May 15)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Nick FitzGerald (May 11)
- Re: Defeating Citibank Virtual Keyboard protection using screenshot method Bojan Zdrnja (May 16)
- RE: Defeating Citibank Virtual Keyboard protection using screenshot method Rogier Mulhuijzen (May 10)
- Message not available
- Defeating Citibank Virtual Keyboard protection using screenshot method aditya kuppa (May 17)
- Re: Defeating Citibank Virtual Keyboard protection using screenshot method Bojan Zdrnja (May 17)