11 Sep 2012
15 Oct 2012
Siemens SIMATIC PCS 7 7.x
Cross-Site Scripting vulnerabilities allow a third party to manipulate the content or behaviour of a web application in a user's browser, without compromising the underlying system.
Different Cross-Site Scripting related vulnerabilities are also classified under this category, including "script insertion" and "cross-site request forgery".
Cross-Site Scripting vulnerabilities are often used against specific users of a website to steal their credentials or to conduct spoofing attacks.
Exposure of sensitive information
Vulnerabilities where documents or credentials are leaked or can be revealed either locally or from remote.
Manipulation of data
This includes vulnerabilities where a user or a remote attacker can manipulate local data on a system, but not necessarily be able to gain escalated privileges or system access.
The most frequent type of vulnerabilities with this impact are SQL-injection vulnerabilities, where a malicious user or person can manipulate SQL queries.
Positive Research has reported multiple vulnerabilities in Siemens SIMATIC WinCC, which can be exploited by malicious people to conduct cross-site scripting attacks, conduct SQL injection attacks, and disclose certain sensitive information.
1) Certain unspecified input passed to the WebNavigator component is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
2) Certain input passed to the WebNavigator component is not properly verified before being used to read files. This can be exploited to read arbitrary files via directory traversal sequences.
3) Certain input passed via SOAP messages to the WebNavigator component is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.
4) An error within the ActiveX control can be exploited to disclose the username and password of an authenticated user.
The vulnerabilities are reported in versions 7.0 SP3 and prior.
Apply Update 3.
Denis Baranov, Sergey Bobrov, Artem Chaykin, Vladimir Kochetkov, Pavel Toporkov, and Timur Yunusov, Positive Research.