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Apple patched a zero-day vulnerability in its MacOS that can bypass critical anti-malware capabilities and which a variant of the notorious Mac threat Shlayer adware dropper already has been exploiting for several months.
Security researcher Cedric Owens first discovered the vulnerability, tracked as CVE-2021–30657 and patched in macOS 11.3, an update dropped by Apple on Monday. The vulnerability is particularly perilous to macOS users because it allows an attacker to very easily craft a macOS payload that goes unchecked by the strict security features built into the OS specifically to keep malware out.
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