“With all of the security improvements Apple has made in the past few years I was pretty surprised that this simple technique worked," Owens says, “So I immediately reported this to Apple given the potential for real world attackers to use this technique to bypass Gatekeeper. Attackers could craft their malware strategically to trick the operating system into letting it run even if it failed key safety checks along the way. The logic flaw Owens found lay not in those systems but rather in macOS itself. And the company's software notarization process mandates that all applications go through an automated vetting process. ![]() Apple's Gatekeeper mechanism requires developers to register with Apple and pay a fee so their software will be able to run on Macs. Security researcher Cedric Owens discovered the bug in mid-March while looking for ways around macOS defenses. ![]() ![]() But a vulnerability in the operating system, publicly disclosed and patched today, was exploited to bypass all of them. With macOS malware on the rise, Apple has been busy in recent years adding layers of protections that make it a lot more difficult for malicious software to run on Macs.
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