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Security Update 2019-004 (High Sierra and Sierra)



Apple released security update 2019-004 for macOS 10.13 High Sierra and 10.12 Sierra a week ago, and then withdrew it quickly due to the core panic experienced by MacBook Pros asleep. The company is now retrying the security update, which updates a number of security issues that were also addressed by macOS 1

0.14.6 Mojave (see “Apple Releases macOS 10.14.6, iOS 12.4, watchOS 5.3, tvOS 12.4, and more,” July 22, 2019 ). In particular, the update addresses instances where an external attacker could cause arbitrary code execution or view sensitive information through a Bluetooth corruption issue, a flooding of stacks in the libxslt library and outside the boundaries of the UIFoundation and the Foundation framework. The security updates also update vulnerabilities related to Quick Look and extract zip files. (Free. For 10.13.6 High Sierra, 1.9 GB; for 10.12.6 Sierra, 927.6 MB; Release Notes)

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