Advisory Details

May 27th, 2016

(Pwn2Own) Apple OS X fontd Sandbox Escape Vulnerability

CVE ID	CVE-2016-1797
CVSS SCORE	4.6, AV:L/AC:L/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. Authentication is not required to exploit this vulnerability. The specific flaw exists within the sandbox policy for the fontd process. The issue lies in the failure to properly ensure the FontValidator binary is either excluded from the policy, or is also sandboxed. An attacker can leverage this in conjunction with other vulnerabilities to execute code outside the context of the Safari sandbox.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/en-us/HT206567
DISCLOSURE TIMELINE	2016-03-16 - Vulnerability reported to vendor 2016-05-27 - Coordinated public release of advisory
CREDIT	lokihardt

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