CVE-2012-3003 in WinCC
Summary
by MITRE
Open redirect vulnerability in an unspecified web application in Siemens WinCC 7.0 SP3 before Update 2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in a GET request.
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Analysis
by VulDB Data Team • 12/03/2021
The vulnerability identified as CVE-2012-3003 represents a critical open redirect flaw within Siemens WinCC 7.0 SP3 before Update 2, a widely deployed industrial automation and SCADA software platform. This vulnerability resides in the web application component of the WinCC system, which provides web-based interfaces for monitoring and controlling industrial processes. The flaw enables malicious actors to manipulate URL parameters in GET requests, creating a pathway for unauthorized redirection of users to arbitrary web addresses. This type of vulnerability is particularly dangerous in industrial environments where operational technology systems are increasingly connected to corporate networks and the internet, potentially exposing critical infrastructure to targeted attacks.
The technical implementation of this vulnerability stems from inadequate input validation within the web application's URL handling mechanism. When users interact with the WinCC web interface, the application fails to properly sanitize or validate URL parameters received through GET requests. This allows attackers to inject malicious URLs that bypass the application's normal navigation controls and redirect users to attacker-controlled websites. The vulnerability specifically affects the authentication and navigation components of the web interface, where URL parameters are processed without sufficient security checks. According to CWE classification, this corresponds to CWE-601: URL Redirection to Untrusted Site ('Open Redirect'), which is categorized under the broader weakness of insufficient input validation. The flaw demonstrates a classic lack of proper output encoding and URL validation that is fundamental to web application security.
The operational impact of CVE-2012-3003 extends beyond simple redirection, creating significant risks for industrial control systems and operational technology environments. Attackers can leverage this vulnerability to conduct sophisticated phishing campaigns targeting system administrators and operators who use the WinCC web interface. The redirected users might be tricked into entering credentials or sensitive information on malicious sites that appear legitimate due to the trusted domain association. In industrial settings, this vulnerability could facilitate more advanced attacks such as credential theft, lateral movement within the network, or even supply chain compromises that target the specific operational technology infrastructure. The vulnerability is particularly concerning because WinCC systems are often integrated with enterprise networks, making them attractive targets for attackers seeking to establish persistent access to critical infrastructure. The ATT&CK framework categorizes this vulnerability under T1566: Phishing, with potential progression to T1071.004: Application Layer Protocol: DNS, and T1021.001: Remote Services: Remote Desktop Protocol, depending on the attacker's objectives and the system's configuration.
Mitigation strategies for CVE-2012-3003 require immediate implementation of security patches provided by Siemens, as well as network-level controls to prevent exploitation. Organizations should implement URL validation and sanitization measures within the web application to ensure that all redirect parameters are properly validated against a whitelist of trusted domains. Network administrators should consider implementing web application firewalls and content filtering solutions to detect and block suspicious URL patterns. The vulnerability highlights the importance of maintaining up-to-date security patches for industrial control systems, as many organizations operating WinCC systems may not regularly apply security updates. Additionally, security awareness training for system operators should emphasize the risks of clicking on unexpected links, particularly when accessing industrial web interfaces. Organizations should also implement monitoring solutions to detect unusual traffic patterns that might indicate exploitation attempts, as the open redirect vulnerability can be used as a stepping stone for more sophisticated attacks within industrial networks.