CVE-2016-4644

Name of the Vulnerable Software and Affected Versions iOS versions prior to 9.3.3 tvOS versions prior to 9.2.2 OS X El Capitan versions prior to 10.11.6 and Security Update 2016-004

Description A downgrade issue existed with HTTP authentication credentials saved in Keychain. This issue was addressed by storing the authentication types with the credentials.

Recommendations For iOS versions prior to 9.3.3, update to version 9.3.3 or later. For tvOS versions prior to 9.2.2, update to version 9.2.2 or later. For OS X El Capitan versions prior to 10.11.6 and Security Update 2016-004, update to version 10.11.6 and apply Security Update 2016-004.