Advisory Details

This vulnerability allows local attackers to disclose sensitive information on vulnerable installations of Apple macOS. 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 IOSurface. The process does not 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 under the context of the kernel.

• 2016-09-06 - Vulnerability reported to vendor
• 2017-06-21 - Coordinated public release of advisory