5 Critical Security Flaws in OS X

Tom Ferris has discovered 5 security flaws in Mac OS X 10.4.6 (and probably the other versions).
Through these flaws, malformed zip, html, bmp, gif, and tiff files can cause a DoS (Denial of Service) on the targeted machines.
It is advised that you do not visit untrusted websites and download the files in the vulnerable formats.