Apple released Safari 3.2.3 and a new public beta of Safari 4 late on Tuesday. The updates provide several security fixes for both versions of Apple's Web browser application.
The updates address issues where an attacker could potentially could cause Safari to crash or execute arbitrary code when a user visits a maliciously crafted Web site. The updates also patch security-related issues when loading maliciously crafted URL feeds, and correct a memory corruption issue in WebKit that could lead to arbitrary code execution when visiting maliciously crafted Web sites.
Safari 3.2.3 and the Safari 4 beta updates are available via Apple's Software update application. Mac OS X 10.5.7 must be installed before the Safari beta 4 update will be available.