Advisory Details

March 10th, 2016

Microsoft Internet Explorer Hidden Browser Window Restriction Bypass Vulnerability

CVE ID
CVSS SCORE	6.4, AV:N/AC:L/Au:N/C:P/I:P/A:N
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Internet Explorer
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['19855']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to create an invisible browser window on vulnerable installations of Microsoft Internet Explorer. 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 window.close() method. By issuing a particular sequence of script commands, an attacker can invoke window.close() and then continue executing script for an indefinite amount of time after the window has already been closed, and even after all browser windows have been closed. The user has no visual indication that script from the attacker's web page is still executing and there is no conventional UI available for stopping it.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/library/security/MS16-023
DISCLOSURE TIMELINE	2015-05-06 - Vulnerability reported to vendor 2016-03-10 - Coordinated public release of advisory
CREDIT	Simon Zuckerbraun - Trend Micro Zero Day Initiative

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