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[DSECRG-12-002] WAGO PLC 750 - unauthorized firmware download [0-day]

It is possible to download firmware from web interface of the PLC without authentication.

Digital Security Research Group [DSecRG] Advisory #DSECRG-00244

Application: WAGO
Versions Affected: WAGO 750-841 and 758-874 maybe others
Vendor URL:
Bugs: Unauthorized access
Exploits: YES
Reported: 22.11.2011
Second: 07.12.2011
Vendor response:
Date of Public Advisory:
Author: Alexandr Polyakov from DSecRG (research center of ERPScan)

It is possible to download firmware from web interface of PLC without authentication.

Product Description

Since its market introduction in 1995, the WAGO-I/O-SYSTEM 750 has morphed into one of the most important modular fieldbus systems for industry, production and process automation.


It is possible to download firmware by using request http://ip:80/PLC/Default.PRG without authentication.


Fix Information
Disable unauthorized access.

About DSecRG
The main mission of DSecRG is to conduct researches of business critical systems such as ERP, CRM, SRM, BI, SCADA, banking software and others. The result of this work is then integrated in ERPScan Security Scanner. Being on the top edge of ERP and SAP security DSecRG research helps to improve quality of ERPScan consulting services and protects you from the latest threats.
Contact: research [at] dsecrg [dot] com

About ERPScan
ERPScan is an innovative company engaged in the research of ERP security. It develops products for ERP system security assessment. Apart from this, the company provides consulting services for secure configuration, development and implementation of ERP systems, and conducts comprehensive assessment and penetration testing of custom solutions.
Our flagship products are "ERPScan Security Scanner for SAP" and "ERPScan Online" service which can help customers to perform automated security assessments and compliance checks for SAP solutions

Contact: info [at] erpscan [dot] com

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