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CitiBank's C2IT.com Cross Site Scripting Bugs
08 January 2002
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Summary

CitiBank's online cash site, C2IT.com, has substantial vulnerabilities to Cross Site Scripting. The site is similar to PayPal in that it lets users attach Bank and Credit Card account to this online system. Users can then "send" cash to any user via their email address.

The site leaves nearly every form field un-filtered. The site also displays credit card numbers, bank account numbers, security codes and other data with no obfuscation. This info is then available to javascript through cross site scripting. Citibank was notified 4 months ago about problems with their sites and many times since, however, no noticeable actions have been taken yet.

This alert documents two sample attacks: -Gaining access to user's credit card and bank account numbers -Scripting cash transfers out of users accounts and/or credit cards

Details

http://www.devitry.com/c2it-security.html

I'm not posting the javascript examples here as many email servers now reject email with even the hint of javascript in them. (Hmm, maybe that is a bad thing if someone is not actually getting what may be an important email?)

-dave

devitry.com




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