TippingPoint Zero Day Initiative

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

ZDI-15-586: December 8th, 2015


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 21207. For further product information on the TippingPoint IPS:

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 CreateObject 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 arbitrary code in the context of the current process.

Vendor Response

Microsoft has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2015-09-22 - Vulnerability reported to vendor
    2015-12-08 - Coordinated public release of advisory


This vulnerability was discovered by:
    Simon Zuckerbraun - HP Zero Day Initiative