CVE-2011-4510 in SIMATIC HMI panel
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, a different vulnerability than CVE-2011-4511.
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Analysis
by VulDB Data Team • 11/29/2021
The CVE-2011-4510 vulnerability represents a critical cross-site scripting flaw within Siemens HMI web server implementations across multiple WinCC products and HMI panels. This vulnerability affects a broad range of industrial automation systems including WinCC flexible versions 2004 through 2008 before SP3, WinCC V11 (TIA portal) before SP2 Update 1, various SIMATIC HMI panels including TP, OP, MP, Comfort Panels, and Mobile Panels, as well as WinCC V11 Runtime Advanced and WinCC flexible Runtime environments. The vulnerability resides in the web server component that serves administrative interfaces and monitoring capabilities to remote users, creating an attack surface that extends beyond traditional network boundaries into operational technology environments. This flaw specifically impacts industrial control systems where human-machine interfaces are exposed to external networks, potentially allowing unauthorized access to critical manufacturing processes and operational data.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output encoding within the HMI web server's response handling mechanisms. Attackers can exploit this weakness by injecting malicious script code through unspecified vectors that typically involve user-controllable parameters in HTTP requests or form submissions. The vulnerability manifests when the web server fails to properly sanitize user-supplied data before rendering it in web responses, allowing attackers to execute arbitrary JavaScript code within the context of authenticated users' browsers. This behavior aligns with CWE-79, which defines cross-site scripting as a code injection vulnerability where untrusted data is embedded into web pages viewed by other users. The attack vector operates through the web interface components that provide remote access to HMI systems, making it particularly dangerous in industrial environments where these interfaces may be accessible from untrusted networks or directly connected to the production floor.
The operational impact of CVE-2011-4510 extends far beyond simple web interface compromise, as it represents a significant threat to industrial control system security and operational integrity. When exploited, this vulnerability allows remote attackers to gain unauthorized access to HMI systems that control critical manufacturing processes, potentially leading to production disruption, data manipulation, or unauthorized process changes. The attack could enable malicious actors to inject malicious scripts that persistently compromise user sessions, allowing for continued access to industrial control systems without detection. This threat is particularly concerning in environments where HMI interfaces are exposed to corporate networks or the internet, as it creates opportunities for lateral movement within industrial networks and potential escalation to more critical system components. The vulnerability's presence in multiple Siemens products across different software versions indicates a systemic weakness in the web server implementation that affects a substantial portion of industrial automation infrastructure.
Mitigation strategies for CVE-2011-4510 must address both immediate protection and long-term architectural improvements to industrial network security. Organizations should prioritize applying official security patches from Siemens, specifically targeting the WinCC flexible versions and TIA portal updates mentioned in the vulnerability description. Network segmentation represents a crucial defensive measure, isolating HMI systems from general corporate networks and implementing strict access controls through firewalls and network access control lists. Additionally, implementing web application firewalls specifically configured to detect and block XSS attack patterns can provide an additional layer of protection for vulnerable HMI systems. Security monitoring should include detection of suspicious web traffic patterns and user session anomalies that might indicate exploitation attempts. The remediation approach should align with industrial cybersecurity frameworks such as those recommended by IEC 62443 and NIST SP 800-82, emphasizing the importance of maintaining secure configurations and implementing defense-in-depth strategies for operational technology environments. Regular security assessments and vulnerability scanning of industrial control systems should be conducted to identify similar weaknesses in other components of the industrial network infrastructure, as this vulnerability demonstrates the need for comprehensive security reviews across all system components.