Advisory Details

December 8th, 2015

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

ZDI-15-586
ZDI-CAN-3318

CVE ID CVE-2015-6135
CVSS SCORE 4.3, (AV:N/AC:M/Au:N/C:P/I:N/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 21207. 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 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:
https://technet.microsoft.com/en-us/library/security/ms15-124.aspx
DISCLOSURE TIMELINE
  • 2015-09-22 - Vulnerability reported to vendor
  • 2015-12-08 - Coordinated public release of advisory
CREDIT Simon Zuckerbraun - HP Zero Day Initiative
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