Advisory Details

December 8th, 2015

Microsoft Windows VBScript InStrB Function Use-After-Free Information Disclosure Vulnerability

ZDI-15-593
ZDI-CAN-3141

CVE ID	CVE-2015-6136
CVSS SCORE	4.3, AV:N/AC:M/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Microsoft Microsoft
AFFECTED PRODUCTS	Internet Explorer Windows
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['20814']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose the contents of memory on applications using the VBScript scripting language 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 implementation of the VBScript InStrB function. By supplying specially crafted parameters, an attacker can disclose the contents of memory. An attacker can use this information in conjunction with other vulnerabilities to execute code in the context of the 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 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	2015-08-31 - Vulnerability reported to vendor 2015-12-08 - Coordinated public release of advisory
CREDIT	Simon Zuckerbraun - HP Zero Day Initiative

BACK TO ADVISORIES