Advisory Details

October 11th, 2016

Microsoft Windows JavaScript Spread Operator Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2016-3386
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 processing of the JavaScript spread operator, as implemented in chakra.dll. By performing actions in JavaScript an attacker can trigger an overflow of a stack-based buffer. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/library/security/MS16-119
DISCLOSURE TIMELINE	2016-07-29 - Vulnerability reported to vendor 2016-10-11 - Coordinated public release of advisory
CREDIT	Richard Zhu (fluorescence)

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