Advisory Details

November 5th, 2018

Apple macOS IntelFBClientControl doAtribute Uninitialized Memory Information Disclosure Vulnerability

ZDI-18-1343
ZDI-CAN-6146

CVE ID CVE-2018-4351
CVSS SCORE 4.7, AV:L/AC:M/Au:N/C:C/I:N/A:N
AFFECTED VENDORS Apple
AFFECTED PRODUCTS macOS
VULNERABILITY 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 the handling of IntelFBClientControl's doAttribute method. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to execute code in 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/HT209139
DISCLOSURE TIMELINE
  • 2018-06-14 - Vulnerability reported to vendor
  • 2018-11-05 - Coordinated public release of advisory
  • 2018-11-05 - Advisory Updated
CREDIT Appology Team @ Theori
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