CVE-2012-2595 in WinCC
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in unspecified web applications in Siemens WinCC 7.0 SP3 before Update 2 allow remote attackers to inject arbitrary web script or HTML via vectors involving special characters in parameters.
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Analysis
by VulDB Data Team • 12/03/2021
The vulnerability identified as CVE-2012-2595 represents a critical security flaw affecting Siemens WinCC 7.0 SP3 before Update 2, specifically targeting web applications within the industrial automation and SCADA (Supervisory Control and Data Acquisition) environment. This vulnerability manifests as multiple cross-site scripting flaws that enable remote attackers to execute malicious web scripts or HTML code within the context of affected web applications. The flaw occurs when special characters in application parameters are not properly sanitized or validated, creating injection points that can be exploited by malicious actors to compromise user sessions and potentially gain unauthorized access to industrial control systems.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. These vulnerabilities arise from insufficient input validation and output encoding mechanisms within the Siemens WinCC web interface components. Attackers can leverage this weakness by crafting malicious payloads containing special characters such as angle brackets, quotes, and other HTML metacharacters that are typically used to inject script code. The vulnerability is particularly concerning because it affects industrial control systems where the web interface components are often exposed to external networks or untrusted users, creating potential attack vectors that could compromise the integrity of critical infrastructure operations.
The operational impact of CVE-2012-2595 extends beyond typical web application security concerns due to the industrial nature of Siemens WinCC systems. When exploited, these XSS vulnerabilities could enable attackers to steal session cookies, redirect users to malicious sites, or inject malicious content that could manipulate the control interface. This represents a significant risk to industrial cybersecurity as it could potentially allow adversaries to interfere with operational processes, manipulate control commands, or gather sensitive operational data from the SCADA environment. The vulnerability's presence in the WinCC platform, which is widely deployed in critical infrastructure sectors including energy, water, and manufacturing, creates widespread potential for operational disruption and security compromise.
Organizations utilizing Siemens WinCC 7.0 SP3 before Update 2 should implement immediate mitigations including applying the vendor-provided security update that addresses this vulnerability. The remediation process involves updating to Siemens WinCC 7.0 SP3 Update 2 or later versions, which contain proper input validation and output encoding mechanisms that prevent the injection of malicious content. Network segmentation strategies should be implemented to limit access to the WinCC web interface to authorized personnel only, while implementing web application firewalls to monitor and filter suspicious traffic patterns. Additionally, regular security assessments should be conducted to identify and remediate similar vulnerabilities in other industrial control system components, as these systems often share similar architectural patterns that may present comparable security risks. The vulnerability demonstrates the importance of maintaining up-to-date security patches in industrial environments where the consequences of exploitation can extend beyond traditional information technology impacts to include physical system compromise and operational disruptions.