Advisory Details

July 20th, 2016

Apple OS X WindowServer _XFlushRegion Out-Of-Bounds Read Privilege Escalation Vulnerability

CVE ID	CVE-2016-4652
CVSS SCORE	3.3, AV:L/AC:M/Au:N/C:P/I:N/A:P
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	OS X
VULNERABILITY DETAILS	This vulnerability allows local attackers to disclose sensitive information on vulnerable installations of Apple OS X. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the CoreGraphics module. The issue lies in the failure to properly validate user-supplied data which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges in the context of WindowServer.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/en-us/HT206903
DISCLOSURE TIMELINE	2016-06-14 - Vulnerability reported to vendor 2016-07-20 - Coordinated public release of advisory
CREDIT	aca055c25829115b84ad07e72a4eff16

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