Along with Mac OS X 10.6.8 for Snow Leopard users, Apple released Security Update 2011-004 for Leopard users on Thursday. The update improves protection against the Mac Defender trojan horse and other potential security issues.
The update includes the same security fixes from the Snow Leopard 10.6.8 update along with improved AirPort network security, a fixes for maliciously crafted ColorSync profiles, maliciously crafted PDFs that take advantage of a CoreGraphics issue, and a Windows ID flaw in Samba, all of which could let an attacker run arbitrary code on the victim’s Mac.
Security Update 2011-004 is available for Leopard and Leopard Server via the Software Update application, or as a downloadable installer at the Apple Support Web site.