Advisory Details

December 8th, 2015

Microsoft Internet Explorer CAttrArray Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2015-6143
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
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 ['20988']. 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 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 vulnerability relates to how Internet Explorer processes style attributes. By manipulating a document's elements an attacker can force an array allocated by a CAttrArray object 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	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/en-us/library/security/ms15-124.aspx
DISCLOSURE TIMELINE	2015-09-17 - Vulnerability reported to vendor 2015-12-08 - Coordinated public release of advisory
CREDIT	Zheng Huang of Baidu Scloud XTeam

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