On a few machines, the cellular connections to the processing servers could be attacked by using encryption keys found in the modem firmware. MORE: The One Router Setting Everyone Should Change (But No One Does) Some had known security flaws in the network hardware or software that could also be exploited, as not all the ATMs had patched the known flaws. Other models secured the traffic using faulty VPNs whose encryption could be cracked. You'd need only to tap into the network traffic, either wired or wirelessly, to grab the card data. Fifteen out of 26 ATMs failed to encrypt communications with processing servers, although some did so over Ethernet rather than wirelessly. "Tested ATMs frequently featured poor firewall protection and insufficient protection for data transmitted between the ATM and processing center," the report noted.īecause of this, not all of the attacks required physical access to the machines. Some of the connections are dedicated direct links, while others go out over the internet. But Positive Technologies found that the computer, its network connections or the interface connecting the computer to the safe could almost always give you cash or a customer's ATM-card information.īefore it can give a user cash, the ATM computer must talk to a server at a far-off transaction processing center, using either a wired Ethernet connection or a cellular modem. The safe contains the cash, and the cash dispenser is directly attached to the safe, which you'd need heavy equipment or explosives to crack open. Open up the cabinet with a drill, a lock pick or a key - one key will often open all units of a given model - and you get physical access to the computer. The computer often runs Windows and has regular keyboard, mouse and network inputs. An ATM consists of a computer and a safe enclosed in a cabinet.
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