There's not much cardholders can do to avoid the attacks, but Visa has advised fuel merchants to encrypt data while it's transferred or support chip-equipped cards. The other problem is that the POS systems aren't firewalled off from other, less critical parts of the network, allowing thieves to gain lateral access once the network is breached. The data is apparently sent in an unencrypted form to the vendor's main network, where the thieves have figured out how to intercept it. ![]() The hack doesn't appear to affect more secure chip cards, but many of the service stations haven't replaced card readers at the pumps yet. They then installed POS scraping software that exploited the lack of security with old-school mag stripes in card readers that can't read chips. In each case, the attackers gained access to the POS networks via malicious emails and other unknown means. ![]() The company's fraud disruption teams are investigating several incidents in which a hacking group known as Fin8 defrauded fuel dispenser merchants. Cybercrime groups are actively exploiting a weakness in gas station point-of-sale (POS) networks to steal credit card data, Visa has revealed.
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