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AUSCERT Security Bulletin
Multiple Vulnerabilities in WinCC 7.0 SP3
12 September 2012
AusCERT Security Bulletin Summary
Product: Siemens SIMATIC WinCC
Operating System: Windows Server 2003
Windows Server 2008
Windows Server 2008 R2
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Cross-site Request Forgery -- Remote with User Interaction
Cross-site Scripting -- Remote with User Interaction
Unauthorised Access -- Remote/Unauthenticated
CVE Names: CVE-2012-3031 CVE-2012-3028 CVE-2012-3030
Member content until: Friday, October 12 2012
Comment: While most of these vulnerabilities have been addressed in a patch
by the vendor, at the time of this advisory's publication one
vulnerability remains unpatched. The vendor has provided steps to
mitigate the outstanding vulnerability.
Multiple vulnerabilities have been identified in Siemens SIMATIC
WinCC version 7.0 SP3.
The vendor describes the WebNavigator component of WinCC as giving
"... the users the possibility to control their plants via the web
browser with the same look-and-feel like local operator stations." 
The vendor has provided the following description regarding these
"WinCC WebNavigator is susceptible to twelve vulnerabilities, which
compromise (depending on the vulnerability) the confidentiality,
integrity or availability of the affected system over the network.
WebNavigator is part of WinCC 7.0." 
Reflected cross site scripting and cross site request forgery
vulnerabilities may allow the attacker to take over the WebNavigator
session with the victimÃ¢Â€Â™s rights. Additionally arbitrary files and
database content may be accessible to a remote, unauthenticated
Siemens provides an update for WinCC 7.0 SP3 which addresses most
vulnerabilities discussed in this bulletin. However the cross site
request forgery vulnerability remains unpatched, and Siemens
recommends the following mitgations:
1. Do not interact with other internet related services whilst
logged in to WebNavigator.
2. Log out when WebNavigator is no longer needed.
 Siemens SIMATIC WinCC Multiple Vulnerabilities
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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