Apple OS X AppleIntelBDWGraphics Memory Corruption Privilege Escalation Vulnerability

July 20th, 2016
ZDI-16-434 ZDI-CAN-3687

CVE ID

CVE-2016-4633

CVSS Score

6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C

Affected Vendors

Apple

Affected Products

OS X

Vulnerability Details


This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Apple OS X. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of the AppleIntelBDWGraphics kernel extension. The issue lies in the failure to properly check user-supplied arguments during an IOKit call. An attacker can leverage this vulnerability to execute code within 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/HT206903

Disclosure Timeline

  • 2016-04-26 - Vulnerability reported to vendor
  • 2016-07-20 - Coordinated public release of advisory

Credit

7CD6CBC56470722CD7DEA01561796431

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