Penetration Testing mailing list archives
Faxing and PCI DSS compliance
From: jw <rx.jeff () yahoo com>
Date: Thu, 24 Jan 2008 12:15:32 -0800 (PST)
Well, let me be more specific. Let's say your company utilizes another company's service where you can receive faxes via email in the form of PDF sent to you. So let's say your customer faxes you full 16 digit cc# with expiration on their regular fax machine. What is your company's PCI liability on this as that fax, with cc info gets to you in the following manner: customer fax cc# --> 3rd party fax service --> to your company in PDF via email So in essence, should your company be liable for non-compliance even though this is not something you can control? j cwright () bdosyd com au wrote: JW, Your first problem will stem from having to encrypt the numbers in transit. The fax to email gateway will have to sign these emails. A set of competating controls could be implemented for this (protected network with firewalls, IDS etc which could take the place of encrption, but this would be a significant investment in itself. The PCI-DSS requirement 3 states "not sending PAN in unencrypted e-mails". 4.2 also specifically states "4.2 Never send unencrypted PANs by e-mail". So as I said, there are possible compensating controls, but I believe that they are going to be far more of an investment then encryption. Next in this case the fax server and email system would have to be on a firewalled segment and not (as is common) on the same network as all the users. With physical faxes, 9.6 applies "Physically secure all paper and electronic media (including computers, electronic media, networking and communications hardware, telecommunication lines, paper receipts, paper reports, and faxes) that contain cardholder data." You would have to have a minimum level of security on the virtualised process as for paper handling. So this would cover (as with the above) encryption, destruction after use etc. Regards, Dr Craig Wright (GSE-Compliance) --- in reply to --- Speaking of faxes.. how do y'all deal with PCI compliance with respect to FAX to email/web applications? For example, if you have a customer who insists on faxing full credit card info on their regular fax machine to a company that is utilizing a service that converts that fax to PDF and emails it to you? j ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ------------------------------------------------------------------------ This list is sponsored by: Cenzic Need to secure your web apps NOW? Cenzic finds more, "real" vulnerabilities fast. Click to try it, buy it or download a solution FREE today! http://www.cenzic.com/downloads ------------------------------------------------------------------------
Current thread:
- Re: Faxing and PCI DSS compliance Nervous (Jan 23)
- <Possible follow-ups>
- Faxing and PCI DSS compliance jw (Jan 25)
- Re: Faxing and PCI DSS compliance Dennis Opacki (Jan 28)
- Re: Faxing and PCI DSS compliance rajat swarup (Jan 28)
- Re: Faxing and PCI DSS compliance David M. Zendzian (Jan 28)