Apple Security Update 2009-001 Released
Security Update 2009-001 covers a wide range of vulnerabilities, ranging from information disclosure to denial of service attacks and system compromises. The particulars can be found in the Apple Knowledgebase:
http://support.apple.com/kb/HT3438
Most OS X systems will be able to grab this update via the standard Software Update mechanism, but you can grab it manually if you like, for both servers and workstations, here:
http://support.apple.com/downloads/
Please update any vulnerable systems as soon as possible.
This announcement posted Friday, February 13, 2009