At the same time that Apple
released an update to Leopard (10.5), the company also fixed a number of
security issues for users running Tiger (10.4).
Security Update 2009-02 updates several areas of Tiger, including Apache, CoreGraphics, CUPS, Disk images, Flash Player plug-in, Help Viewer, Spotlight, X11, and more. It fixes problems ranging from keeping PDFs opened in CoreGraphics from executing malicious code to preventing maliciously crafted Mach-O executables from causing the Finder to repeatedly terminate and relaunch.
There are four version of the update, one each for Tiger client
Intel, as well as Tiger Server
Universal. All require you to be running 10.4.11, and the proper update should show up using Tiger’s Software Update mechanism.