PT-2012-43: Arbitrary Files Reading in Siemens Simatic WinCC WebNavigator
Siemens Simatic WinCC WebNavigator
Version: 7.0 SP3 and earlier
Severity level: Medium
Impact: Arbitrary Files Reading
Access Vector: Remote
Base Score: 5.0
Simatic WinCC is a part of Siemens SIMATIC HMI software that aimed to provide connection between an operator and PLCs that manage technological processes. The WebNavigator component of WinCC gives the users the possibility to control their plants via the web browser with the same look-and-feel like local operator stations.
The specialists of the Positive Research center have detected "Arbitrary Files Reading" vulnerability in Siemens Simatic WinCC WebNavigator.
Arbitrary file reading over the web interface was possible on the web folder on certain directories and files. An attacker with access to the WebNavigator web server can read data like log files and configuration files, which might have sensitive content.
How to fix
Update your software up to the latest version
16.07.2012 - Vendor is notified
16.07.2012 - Vendor gets vulnerability details
10.09.2012 - Vendor releases fixed version and details
13.09.2012 - Public disclosure
The vulnerability was discovered by Sergey Bobrov, Positive Research Center (Positive Technologies Company)
Reports on the vulnerabilities previously discovered by Positive Research: