Advisory Details

May 18th, 2017

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

ZDI-17-364
ZDI-CAN-4610

CVE ID CVE-2017-2543
CVSS SCORE 6.9, AV:L/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS Apple
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.
ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/en-us/HT207797
DISCLOSURE TIMELINE
  • 2017-03-17 - Vulnerability reported to vendor
  • 2017-05-18 - Coordinated public release of advisory
CREDIT 360 Vulcan Team
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