PT-2014-12: Information Disclosure in Siemens SIMATIC WinCC
Vulnerable platform
SIMATIC WinCC
Version: 7.2 and earlier
SIMATIC PCS7
Version: 8.0 and earlier
Link:
http://www.siemens.com/
Severity level
Severity level: Medium
Impact: Information Disclosure
Access Vector: Remote
CVSS v2:
Base Score: 5.0
Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)
CVE: CVE-2014-4682
Platform description
Siemens 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.
Vulnerability description
The specialists of the Positive Research center have detected an Information disclosure vulnerability in SIMATIC WinCC.
The SIMATIC WinCC WebNavigator server at port 80/tcp and port 443/tcp could allow unauthenticated access to sensitive data if an attacker sends specially crafted HTTP requests to this port.
How to fix
Update your software up to the latest version
Advisory status
23.12.2012 - Vendor gets vulnerability details
23.07.2014 - Vendor releases fixed version and details
29.07.2014 - Public disclosure
Credits
The vulnerability was detected by Alexander Tlyapov, Positive Research Center (Positive Technologies Company)
References
http://en.securitylab.ru/lab/PT-2014-12
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-214365.pdf
Reports on the vulnerabilities previously discovered by Positive Research:
http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/