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

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.