MacOS X SoftwareUpdate Arbitrary Package Installation Vulnerability Solution:
Look for updates from Apple on http://www.info.apple.com/support/downloads.html.
Apple has released fixes.
Apple Mac OS X 10.1
Apple Mac OS X 10.1.1
Apple Mac OS X 10.1.2
Apple Mac OS X 10.1.3
Apple Mac OS X 10.1.4
Apple Mac OS X 10.1.5