TippingPoint Zero Day Initiative

Microsoft .NET Framework mscoreei DLL Planting Remote Code Execution Vulnerability

ZDI-16-234: April 12th, 2016


CVSS Score

Affected Vendors

Affected Products

    .NET Framework

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft .NET Framework. User interaction is required to exploit this vulnerability in that the target must visit a malicious web page or open a malicious directory or device.

The specific flaw exists within the handling of a specific named DLL used by .NET Framework. By providing a directory with this specific DLL, an attacker is able to force the process to load an arbitrary DLL. This allows an attacker to execute arbitrary code in the context of the process.

Vendor Response

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

Disclosure Timeline

    2016-03-29 - Vulnerability reported to vendor
    2016-04-12 - Coordinated public release of advisory


This vulnerability was discovered by: