Advisory Details

November 20th, 2017

Microsoft Windows VBScript Join Function Integer Overflow Remote Code Execution Vulnerability

ZDI-17-916
ZDI-CAN-5112

CVE ID CVE-2017-11869
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 29794. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. 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 Join function in VBScript. By performing actions in VBScript, an attacker can trigger an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code under the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11869
DISCLOSURE TIMELINE
  • 2017-09-01 - Vulnerability reported to vendor
  • 2017-11-20 - Coordinated public release of advisory
CREDIT Anonymous
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