Apple has released another bundle of security updates for Mac OS X. There are fixes that address issues with the operating system's e-mail client and Safari, the default Web browser, as well as other fixes.
Updates are available for OS X 10.4.5 and 10.3.9 and the same version numbers of OS X Server. Mac users can upgrade manually through Apple Downloads or through Software Update.
Without these fixes, it is possible for an attacker to trigger a condition that allows the execution of unwanted programs on the user's system, using a specially crafted e-mail message. It is also possible for Safari to automatically open a file that appears to be a safe file type but is actually an application of the attacker's choosing without these fixes.