[原文]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.
Mac OS X contains a flaw that may allow a malicious application to access Keychain items without first requesting that the Keychain be unlocked. The issue is triggered when the application has obtained a reference to a Keychain item prior to the keychain being locked, which may allow the application to continue to use the item. It is possible that the flaw may allow unauthorized access to login information resulting in a loss of confidentiality.
Install Apple Security Update 2006-003, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.