Advisory Details

June 21st, 2017

Apple OS X CoreStorage Privilege Escalation Vulnerability

ZDI-16-688
ZDI-CAN-3877

CVE ID CVE-2016-7603
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 CoreStorage. The issue lies with the failure to validate user-supplied arguments which can cause a null pointer dereference. An attacker can leverage this vulnerability to escalate privileges and execute 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/HT207423
DISCLOSURE TIMELINE
  • 2016-08-25 - Vulnerability reported to vendor
  • 2017-06-21 - Coordinated public release of advisory
CREDIT daybreaker@Minionz
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