Apple has released security updates for Safari, OS X Yosemite (and previous OS X versions), and iOS.
The OS X update contains fixes for 77 vulnerabilities, many of which can be exploited by attackers to gain admin or root privilege, crash applications, perform unauthenticated access to the system, execute arbitrary code, intercept network traffic, and so on.
It also includes fixes for vulnerabilities in the Mac EFI (Extensible Firmware Interface), one of which could allow a malicious app with root privileges to modify EFI flash memory when it resumes from sleep states.
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