TippingPoint Zero Day Initiative

WellinTech KingScada AEserver.exe Remote Code Execution Vulnerability

ZDI-14-071: April 10th, 2014


CVSS Score

Affected Vendors

Affected Products


TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 13214. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of WellinTech KingScada. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the protocol parsing code contained in kxNetDispose.dll. The parent service is called AEserver.exe and listens on port 12401. The process performs arithmetic on an user-supplied value used to determine the size of a copy operation allowing a potential integer wrap to cause a stack buffer overflow. An unauthenticated attacker can leverage this vulnerability to execute code under the context of the SYSTEM user.

Vendor Response

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

Disclosure Timeline

    2014-02-25 - Vulnerability reported to vendor
    2014-04-10 - Coordinated public release of advisory


This vulnerability was discovered by: