PT-2013-78: Buffer overflow in SIMATIC WinCC Open Architecture

(PT-2013-78) Positive Technologies Security Advisory
Buffer overflow in SIMATIC WinCC Open Architecture

Vulnerable platform

SIMATIC WinCC Open Architecture
Version: 3.12 and earlier


Severity level

Severity level: High
Impact: Arbitrary Code Execution
Access Vector: Remote

CVSS v2:
Base Score: 9.3
Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C)

CVE: CVE-2014-1697

Platform description

SIMATIC WinCC Open Architecture is a SCADA system for visualizing and operating processes, production flows, machines and plants in all lines of business.

Vulnerability description

The specialists of the Positive Research center have detected a Buffer overflow vulnerability in SIMATIC WinCC Open Architecture.

The SIMATIC WinCC OA integrated Web server at Port 4999/TCP might allow attackers to perform remote code execution by sending specially crafted packets without authentication.

How to fix

Update your software up to the latest version

Advisory status

01.12.2013 - Vendor gets vulnerability details
03.02.2014 - Vendor releases fixed version and details
14.02.2014 - Public disclosure


The vulnerability was detected by Kirill Nesterov, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research:

About Positive Technologies

Positive Technologies is a leading provider of vulnerability assessment, compliance management and threat analysis solutions to more than 1,000 global enterprise clients. Our solutions work seamlessly across your entire business: securing applications in development; assessing your network and application vulnerabilities; assuring compliance with regulatory requirements; and blocking real-time attacks. Our commitment to clients and research has earned Positive Technologies a reputation as one of the foremost authorities on SCADA, Banking, Telecom, Web Application and ERP security, and distinction as the #1 fastest growing Security and Vulnerability Management firm in 2012, as shown in an IDC report*. To learn more about Positive Technologies please visit

*Source: IDC Worldwide Security and Vulnerability Management 2013-2017 Forecast and 2012 Vendor Shares, doc #242465, August 2013. Based on year-over-year revenue growth in 2012 for vendors with revenues of $20M+