For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.
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Where possible, CVE IDs are used to reference the vulnerabilities for further information.
To learn about other security updates, see Apple security updates.
Mac EFI Security Update 2015-002
Available for: OS X Mavericks v10.9.5
Impact: An attacker can exercise unused EFI functions
Description: An issue existed with EFI argument handling. This was addressed by removing the affected functions.
CVE-2015-4860 : Corey Kallenberg, Xeno Kovah, John Butterworth, and Sam Cornwell of The MITRE Corporation, coordinated via CERT