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September 29, 2017 08:00 pm

Critical EFI Code in Millions of Macs Isn't Getting Apple's Updates

Andy Greenberg, writing for Wired:At today's Ekoparty security conference, security firm Duo plans to present research on how it delved into the guts of tens of thousands of computers to measure the real-world state of Apple's so-called extensible firmware interface, or EFI. This is the firmware that runs before your PC's operating system boots and has the potential to corrupt practically everything else that happens on your machine. Duo found that even Macs with perfectly updated operating systems often have much older EFI code, due to either Apple's neglecting to push out EFI updates to those machines or failing to warn users when their firmware update hits a technical glitch and silently fails. For certain models of Apple laptops and desktop computers, close to a third or half of machines have EFI versions that haven't kept pace with their operating system system updates. And for many models, Apple hasn't released new firmware updates at all, leaving a subset of Apple machines vulnerable to known years-old EFI attacks that could gain deep and persistent control of a victim's machine.

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