CVE-2013-4912 in WinCC
Summary
by MITRE
Open redirect vulnerability in Siemens WinCC (TIA Portal) 11 and 12 before 12 SP1 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks by leveraging improper configuration of SIMATIC HMI panels by the WinCC product.
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Analysis
by VulDB Data Team • 01/04/2022
The CVE-2013-4912 vulnerability represents a critical open redirect flaw within Siemens WinCC software versions 11 and 12 prior to Service Pack 1, specifically affecting the TIA Portal environment. This vulnerability stems from improper configuration handling within SIMATIC HMI panels that are managed through the WinCC product, creating a pathway for malicious actors to manipulate user navigation. The flaw exists in the authentication and authorization mechanisms that govern how the system handles redirection requests, allowing attackers to craft malicious URLs that would redirect unsuspecting users to attacker-controlled domains. The vulnerability is particularly concerning because it operates at the application layer and can be exploited remotely without requiring authentication, making it accessible to any user who interacts with the affected system components.
The technical implementation of this vulnerability lies in the improper validation of redirect URLs within the WinCC configuration processes. When HMI panels are configured through the TIA Portal, the system fails to adequately sanitize or validate redirect parameters, allowing attackers to inject malicious URLs that bypass normal security controls. This flaw aligns with CWE-601, which specifically addresses open redirect vulnerabilities where applications redirect users to external domains without proper validation. The vulnerability can be exploited through various attack vectors including web-based interfaces, configuration tools, and potentially through social engineering campaigns that leverage the redirect functionality. The affected systems are particularly vulnerable because they often operate in industrial environments where security controls may be less stringent than in traditional IT environments, making them attractive targets for attackers seeking to establish persistent access or conduct reconnaissance activities.
The operational impact of CVE-2013-4912 extends beyond simple phishing attacks, as it creates opportunities for more sophisticated social engineering campaigns and credential theft operations. Attackers can leverage this vulnerability to redirect users to malicious sites that appear legitimate, potentially harvesting credentials or deploying malware within industrial control environments. The vulnerability's exploitation can lead to unauthorized access to critical industrial systems, potentially compromising the integrity of control processes and creating opportunities for more severe attacks such as those categorized under the ATT&CK framework's initial access and credential access phases. Organizations using affected WinCC versions face significant risk of supply chain attacks where attackers compromise the industrial control systems through these redirect mechanisms, particularly in environments where users may not be security-aware and where the attack surface includes both IT and OT components.
Mitigation strategies for this vulnerability require immediate implementation of service pack updates from Siemens, specifically version 12 SP1 or later, which address the improper URL validation mechanisms. Network segmentation and access controls should be implemented to limit exposure of affected systems to untrusted networks, while also deploying web application firewalls that can detect and block suspicious redirect patterns. Organizations should conduct comprehensive vulnerability assessments to identify all instances of affected WinCC versions within their industrial control environments, as the vulnerability may exist across multiple system components and configurations. Security monitoring should be enhanced to detect anomalous redirect behaviors in system logs and network traffic, particularly focusing on unusual patterns that may indicate exploitation attempts. The vulnerability also highlights the importance of secure configuration management practices, where organizations should establish strict controls over how HMI panel configurations are managed and validated. Regular security awareness training for industrial personnel is essential to prevent successful social engineering exploitation of the redirect vulnerability, as the attack often relies on user interaction with malicious links rather than purely technical exploitation methods.