PT-2012-45: Username and password disclosure in ActiveX control in Siemens Simatic WinCC WebNavigator Vulnerable softwareSiemens Simatic WinCC WebNavigator Version: 7.0 SP3 and earlierApplication link: http://www.siemens.com/Severity levelSeverity level: High Impact: Username and password disclosure Access Vector: Remote CVSS v2: Base Score: 8.3 Vector: (AV:N/AC:M/Au:N/C:C/I:P/A:P)CVE: CVE-2012-3034Software description 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.Vulnerability descriptionThe specialists of the Positive Research center have detected "Username and password disclosure" vulnerability in Siemens Simatic WinCC WebNavigator.WebNavigator uses ActiveX controls in the user’s browser. The methods of these ActiveX controls can be called by any web site this user visits. By maliciously parameterizing this method, the attacker can gain access to username and password of the legitimate user.How to fixUpdate your software up to the latest versionAdvisory status16.07.2012 - Vendor is notified 16.07.2012 - Vendor gets vulnerability details 10.09.2012 - Vendor releases fixed version and details 13.09.2012 - Public disclosureCreditsThe vulnerability was discovered by Denis Baranov, Positive Research Center (Positive Technologies Company)Referenceshttp://en.securitylab.ru/lab/PT-2012-45 http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-864051.pdf Reports on the vulnerabilities previously discovered by Positive Research:http://ptsecurity.com/research/advisory/ http://en.securitylab.ru/lab/