Gatekeeper bypasses such as this could be leveraged as a vector for initial access by malware and other threats and could help increase the success rate of malicious campaigns and attacks on macOS.Īfter carefully reviewing the implications, we shared the vulnerability with Apple in July 2022 through Coordinated Vulnerability Disclosure (CVD) via Microsoft Security Vulnerability Research (MSVR). We developed a proof-of-concept exploit to demonstrate the vulnerability, which we call “Achilles”. On July 27, 2022, Microsoft discovered a vulnerability in macOS that can allow attackers to bypass application execution restrictions imposed by Apple’s Gatekeeper security mechanism, designed to ensure only trusted apps run on Mac devices.

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