A zero-day software vulnerability in the firmware of older Apple computers could be used to slip hard-to-remove malware onto a computer, reports the IDG News Service (http://tinyurl.com/q2pkhpb).

Pedro Vilaca, who studies Mac security, says in his blog (http://tinyurl.com/qeohn2k) that the flaw he found builds on previous ones but this one could be far more dangerous. He says it's possible to tamper with an Apple computer’s UEFI (unified extensible firmware interface). UEFI is firmware designed to improve upon BIOS, which is low-level code that bridges a computer’s hardware and operating system at startup.