Advisory Details

May 19th, 2016

(Pwn2Own) Apple Safari ArrayStorage DFG Optimization Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2016-1857
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Apple
AFFECTED PRODUCTS	Safari
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['24032']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari. 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 ArrayBuffer objects. By triggering certain JavaScript optimizations, an attacker can force an ArrayBuffer in memory to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS	Apple has issued an update to correct this vulnerability. More details can be found at: https://support.apple.com/en-us/HT206568
DISCLOSURE TIMELINE	2016-03-16 - Vulnerability reported to vendor 2016-05-19 - Coordinated public release of advisory
CREDIT	Liang Chen of KeenLab Tencent Zhen Feng of KeenLab Tencent wushi of KeenLab Tencent

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