Hackers infect Oracle's credit card reading machines - CNET

When you hand your credit card over at a restaurant a hotel room, you probably don't mean to give your information to hackers, too.

But that appears to be what hackers tried to make happen on card-reading machines sold by Oracle under the Micros Systems brand, which the company said were infected with malware in an undated letter sent to customers.

"Oracle Security has detected and addressed malicious code in certain legacy Micros systems," the letter said.

According to Brian Krebs, a security expert who first reported the breach on Monday, the card readers were used by retailers, restaurants and hotels at more than 330,000 cash registers when Oracle bought Micros in 2014.