Apple Security Advisory 2013-03-14-1 - OS X Mountain Lion version 10.8.3 and Security Update 2013-001 addresses multiple vulnerabilities. These updates address a canonicalization issue with HFS and Apache, a buffer overflow in libtiff, an authentication bypass, and more.
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Apple Security Advisory 2013-01-28-1 - iOS 6.1 Software Update is now available and addresses multiple security vulnerabilities.
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