Apple Mac OS X Mach Port Inheritance Privilege Escalation Vulnerability

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Mach ports (http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming/boundaries/chapter_14_section_4.html) are used to provide inter-process communication (IPC) facilities on Mac OS X.

http://www.securiteam.com/securitynews/6Q00E2KKAO.html