Apple released a security update for Mac OS X this weekend. The security update is called simple "Security Update 10-19-01," and fixes a bug that could allow someone to gain root access to your Mac under certain circumstances. Appleis ReadMe information is rather terse:
Important update that provides increased security for application access privileges. For Security Update 10/19/01 changes to take effect, a restart is required.
You can find the update at Appleis Web site. You can also get the download through the Software Update Control Panel in your Mac OS X System Preferences. As with any security update from Apple, The Mac Observer strongly recommends that you install this one.