Advisory Details

July 10th, 2018

Apple macOS APFS methodVolumeCreate Use-After-Free Privilege Escalation Vulnerability

ZDI-18-602
ZDI-CAN-6132

CVE ID CVE-2018-4268
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 APFS. 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 vulnerability to escalate privileges and execute code as 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/HT208937
DISCLOSURE TIMELINE
  • 2018-04-25 - Vulnerability reported to vendor
  • 2018-07-10 - Coordinated public release of advisory
  • 2018-07-10 - Advisory Updated
CREDIT Mac
BACK TO ADVISORIES