CVE-2012-3723
Apple Mac OS X before 10.7.5 does not properly handle the bNbrPorts field of a USB hub descriptor, which allows physically proximate attackers to execute arbitrary code or cause a denial of service (memory corruption and system crash) by attaching a USB device.
Date published : 2012-09-20
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html