Advisory Details

March 22nd, 2016

Apple OS X TTF bdat Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-16-204
ZDI-CAN-3448

CVE ID CVE-2016-1775
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Apple
AFFECTED PRODUCTS OS X
VULNERABILITY DETAILS


This vulnerability allows remote 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 TTF fonts. The issue lies in the handling of the bdat table. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.

VENDOR RESPONSE Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/en-us/HT206167
DISCLOSURE TIMELINE
  • 2015-12-17 - Vulnerability reported to vendor
  • 2016-03-22 - Coordinated public release of advisory
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