About the security content of the Mac OS X 10.4.6 Update
For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.
For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key."
Where possible, CVE IDs are used to reference the vulnerabilities for further information.
To learn about other Security Updates, see "Apple Security Updates."
Mac OS X v10.4.6 Update
Available for: Mac OS X 10.4.5
Impact: Firmware password can be bypassed on Intel-based Macintosh computers
Description: Intel-based Macintosh computers support the firmware password feature. Prior to this update, a person with physical access to the computer could bypass the firmware password and access Single User Mode. This update addresses the issue by enhancing the security provided by the firmware password. Credit to David Pugh of the University of Michigan for reporting this issue.