The new iOS 4.3 and Apple TV 4.2 updates address a host of security vulnerabilities, official notes show. The majority of the fixes are associated with v4.3, and in particular Safari and/or its underlying WebKit rendering engine; Apple remarks for example that in iOS 4.2.1, clearing cookies sometimes has no effect. The v4.3 update also copes with vulnerabilities in FreeType, TIFF images, libxml, Wi-Fi networking and the handling of IPv6 addresses.
