Keychain in Apple Mac OS X 10.3.9 and 10.4.6 might allow an application to bypass a locked Keychain by first obtaining a reference to the Keychain when it is unlocked, then reusing that reference after the Keychain has been locked. This vulnerability is addressed in the following product release:
Apple, Mac OS X, 10.4.6 (2006-003)
Publication date: Sat, 13 May 2006 02:02:00 +0000