Advisory Details

November 10th, 2015

Microsoft Windows VBScript Join Function Type Confusion Remote Code Execution Vulnerability

CVE ID	CVE-2015-6055
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Windows
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['21187']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code in applications using the VBScript scripting language running on vulnerable installations of Microsoft Windows. Microsoft Internet Explorer is an affected application. 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 Join function in VBScript. By passing unexpected arguments to this function, an attacker can cause an integer to be incorrectly interpreted as a pointer to an object in memory. An attacker can leverage this vulnerability to execute arbitrary code in 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/MS15-108
DISCLOSURE TIMELINE	2015-09-22 - Vulnerability reported to vendor 2015-11-10 - Coordinated public release of advisory
CREDIT	Simon Zuckerbraun - HPE Security Zero Day Initiative

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