PT-2013-43: Hard-coded credentials in Siemens WinCC and SIMATIC PCS 7 Vulnerable softwareSiemens WinCC Version: 7.2 and earlierSiemens SIMATIC PCS 7 Version: 8.0 SP1 and earlierApplication link: http://www.siemens.com/Severity levelSeverity level: High Impact: Unauthorized access, DoS Access Vector: Remote CVSS v2: Base Score: 7.5 Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)CVE: CVE-2013-3958Software descriptionSiemens 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 descriptionThe specialists of the Positive Research center have detected a vulnerability in Siemens WinCC and SIMATIC PCS 7 related to hard-coded credentials used in the login system .Attackers with network access and knowledge of the credentials could log into the Web Navigator Web applications as an authenticated user. This could allow the attacker to execute any system action provided to an authenticated user.How to fixUpdate your software up to the latest versionAdvisory status 03.03.2013 - Vendor gets vulnerability details 14.06.2013 - Vendor releases fixed version and details 03.07.2013 - Public disclosureCreditsThe vulnerability was detected by Alexander Tlyapov, Positive Research Center (Positive Technologies Company)Referenceshttp://en.securitylab.ru/lab/PT-2013-43 http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345843.pdf https://ics-cert.us-cert.gov/advisories/ICSA-13-169-02 Reports on the vulnerabilities previously discovered by Positive Research:http://ptsecurity.com/research/advisory/ http://en.securitylab.ru/lab/