Advisory Details

August 29th, 2016

Apple OS X AppleHDA Buffer Overflow Privilege Escalation Vulnerability

CVE ID	CVE-2016-1820
CVSS SCORE	6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	OS X
VULNERABILITY DETAILS	This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Apple OS X. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the AppleHDA kernel extension. The issue lies in the failure to validate a user-supplied size prior to copying data into a kernel buffer. A local attacker can leverage this vulnerability to escalate privileges and execute code within the context of the kernel.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/en-us/HT206567
DISCLOSURE TIMELINE	2016-03-11 - Vulnerability reported to vendor 2016-08-29 - Coordinated public release of advisory
CREDIT	Jack Tang and Moony Li of Trend Micro

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