Advisory Details

July 1st, 2015

Apple OS X morx nSubtables Memory Corruption Remote Code Execution Vulnerability

ZDI-15-287
ZDI-CAN-2735

CVE ID CVE-2015-3679
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 font collection files. The issue lies in the parsing of the 'morx' table. An attacker can leverage this vulnerability to execute code under the context of the current user.
ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT201222
DISCLOSURE TIMELINE
  • 2015-02-26 - Vulnerability reported to vendor
  • 2015-07-01 - Coordinated public release of advisory
CREDIT Pawel Wylecial
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