TippingPoint Zero Day Initiative

Microsoft Skype DLL Planting Remote Code Execution Vulnerability

ZDI-16-680: April 6th, 2017

CVSS Score

Affected Vendors

Affected Products


Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Skype. 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 handling of .skype files. By providing a crafted file, an attacker is able 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
    2017-04-06 - Coordinated public release of advisory


This vulnerability was discovered by: