TippingPoint Zero Day Initiative
 

(Pwn2Own) Apple macOS AppleMultitouchDevice Use-After-Free Privilege Escalation Vulnerability

ZDI-17-364: May 18th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

    macOS

Vulnerability Details


This vulnerability allows local attackers to escalate privileges 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 the handling of the AppleMultitouchDevice kext. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code under the context of the kernel.

Vendor Response

Apple has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2017-03-17 - Vulnerability reported to vendor
    2017-05-18 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    360 Vulcan Team