PT-2013-26: Information Disclosure in Siemens Simatic WinCC and PCS 7
Siemens Simatic WinCC
Version: 7.0 SP3 and earlier
Siemens Simatic PCS 7
Version: 8.0 and earlier
Severity level: Medium
Impact: Information Disclosure
Access Vector: Remote
Base Score: 4.0
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 specialists of the Positive Research center have detected "Information Disclosure" vulnerability in Siemens Simatic WinCC and PCS 7.
Users with legitimate, non-privileged access to WinCC MS SQL database can retrieve obfuscated user passwords for WebNavigator. For doing this, access to the system is needed either locally or from the adjacent network and the user’s account must have adequate permissions.
How to fix
Update your software up to the latest version
11.07.2012 - Vendor gets vulnerability details
15.03.2013 - Vendor releases fixed version and details
29.03.2013 - Public disclosure
The vulnerability was discovered by Sergey Gordeychik, Positive Research Center (Positive Technologies Company)
Reports on the vulnerabilities previously discovered by Positive Research: