Description
The Security - Keychain component in Apple OS X before 10.9.4 does not properly implement keystroke observers, which allows physically proximate attackers to bypass the screen-lock protection mechanism, and enter characters into an arbitrary window under the lock window, via keyboard input.
References
- http://support.apple.com/kb/HT6296
- 1030505 vdb-entry
- APPLE-SA-2014-06-30-2 vendor-advisory