AppleWebKit suffers from a bypass in the pop-up blocker via a cross-origin or sandboxed iframe.
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Ubuntu Security Notice 3200-1 - A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.
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WebKitGTK+ has been updated to address a large quantity of vulnerabilities ranging from memory corruption to arbitrary code execution.
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Apple Security Advisory 2017-01-23-2 - macOS 10.12.3 is now available and addresses suffers from code execution and various other security vulnerabilities.
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Apple Security Advisory 2017-01-23-1 - iOS 10.2.1 is now available and addresses logic issues, code execution, and multiple other security vulnerabilities.
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