Research > Zero-Day Tracker > 20110902
Apple Mac OS X Keychain Certificate Security Bypass
Apple OS X 10.6.8 and prior
OS X does not properly handle the Extended Validation certificate attribute of Certificate Authority certificates. Within the Keychain, if a user has marked an Extended Validation certificate as not to be trusted, OS X will still trust it.
This vulnerability allows an attacker to spoof an Extended Validation certificate, for use within a man-in-the-middle attack. This would permit attackers to monitor and/or modify traffic that is normally encrypted.
No mitigation has been provided.
9.2.2011 - Public Information Released
9.9.2011 - Apple releases Security Update 2011-005 for Snow Leopard and Lion
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