Advisory Details

November 10th, 2015

Microsoft Windows VBScript Join Function Type Confusion Remote Code Execution Vulnerability

ZDI-15-537
ZDI-CAN-3327

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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