From the look of it Apple has released a bunch of updates for OS X. A number of security issues are detailed. As always, SANS has some good details and links to more info on each of the ~13 issues. Many of them are legacy bugs if you will from older *nix-based systems. This is as good a time as any for the now familiar lesson – NO operating system is invulnerable, you must keep any software install updated with current security patches.