Apple Security Advisory 2015-06-30-1 - iOS 8.4 is now available and addresses denial of service, an incorrect issued certificate, arbitrary code execution, and various other flaws.
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Apple Security Advisory 2015-05-06-1 - Safari 8.0.6, Safari 7.1.6, and Safari 6.2.6 are now available and address memory corruption, information compromise, and unauthorized access vulnerabilities.
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