The protected range register in the EFI component in Apple OS X before 10.11 has an incorrect value, which allows attackers to cause a denial of service (boot failure) via a crafted app that writes to an unintended address.
Base Score: 7.1
Impact Score: 6.9
Exploitability Score: 8.6
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions up to 10.10.5 (inclusive)
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