CVE-2012-3871 in Openconstructor
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in data/hybrid/i_hybrid.php in Open Constructor 3.12.0 allows remote authenticated users to inject arbitrary web script or HTML via the header parameter.
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Analysis
by VulDB Data Team • 06/21/2024
The CVE-2012-3871 vulnerability represents a critical cross-site scripting flaw within the Open Constructor content management system version 3.12.0. This vulnerability exists in the data/hybrid/i_hybrid.php file and specifically targets the header parameter handling mechanism. The flaw allows authenticated remote attackers to inject malicious web scripts or HTML code into the application's response, potentially compromising user sessions and data integrity. The vulnerability's classification as a persistent XSS issue means that malicious code can be stored and executed whenever affected pages are accessed by other users, making it particularly dangerous in multi-user environments where administrators or regular users might be tricked into viewing compromised content. The attack vector requires an authenticated user context, which reduces the attack surface but does not eliminate the severity of the vulnerability. This type of vulnerability directly violates the principle of least privilege and demonstrates inadequate input validation and output encoding practices within the application's security architecture.
The technical exploitation of this vulnerability stems from insufficient sanitization of the header parameter in the i_hybrid.php script. When an authenticated user submits data containing malicious script code through the header parameter, the application fails to properly encode or validate this input before incorporating it into the web response. This failure creates a persistent XSS condition where the malicious code becomes part of the application's legitimate output and executes in the context of other users' browsers. The vulnerability can be leveraged to steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. From a security controls perspective, this represents a breakdown in the application's defense-in-depth strategy, specifically failing to implement proper input validation and output encoding mechanisms that are fundamental to preventing XSS attacks. The vulnerability's impact is amplified by the fact that it affects the hybrid data handling functionality, which likely serves as a bridge between different data sources and user interfaces, potentially providing broader access to application components.
The operational impact of CVE-2012-3871 extends beyond simple script injection, as it creates a potential attack vector for more sophisticated exploits within the Open Constructor environment. An attacker who successfully exploits this vulnerability could gain unauthorized access to administrative functions, modify content, or exfiltrate sensitive data from the system. The authenticated nature of the attack means that the attacker must first obtain valid credentials, but once achieved, the vulnerability provides a persistent backdoor for maintaining access and expanding the attack surface. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and it can be mapped to ATT&CK technique T1566.001 for the initial compromise phase. Organizations using Open Constructor 3.12.0 face significant risk from this vulnerability, as it allows for the execution of arbitrary code in the context of authenticated users, potentially leading to complete system compromise. The vulnerability also demonstrates poor security hygiene in the application's codebase, particularly regarding the handling of user-supplied data in sensitive application components.
Mitigation strategies for CVE-2012-3871 must address both immediate remediation and long-term architectural improvements. The primary solution involves implementing proper input validation and output encoding mechanisms throughout the application's data handling pipeline, specifically targeting the header parameter in the i_hybrid.php file. Organizations should implement Content Security Policy headers to limit script execution and sanitize all user-supplied input before processing. Additionally, the application should enforce strict parameter validation and employ proper HTML encoding for all dynamic content generation. Security patches should be applied immediately to upgrade to versions of Open Constructor that address this vulnerability, as the issue affects the core data handling functionality. Regular security testing including automated vulnerability scanning and manual penetration testing should be implemented to identify similar flaws in other application components. The vulnerability also highlights the importance of implementing secure coding practices and regular security reviews, particularly focusing on input validation and output encoding as recommended by OWASP Top 10 and ISO/IEC 27001 standards. Organizations should also consider implementing web application firewalls and monitoring for suspicious parameter submissions to detect and prevent exploitation attempts.