CVE-2009-3751 in Opial
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in home.php in Opial 1.0 allows remote attackers to inject arbitrary web script or HTML via the genres_parent parameter.
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Analysis
by VulDB Data Team • 12/03/2024
The CVE-2009-3751 vulnerability represents a classic cross-site scripting flaw in the Opial 1.0 content management system that exposes users to potential malicious code execution through web-based attacks. This vulnerability specifically affects the home.php script and manifests when the genres_parent parameter is improperly handled during input validation. The flaw allows remote attackers to inject arbitrary web scripts or HTML code into the application's response, creating a persistent security risk for all users interacting with the vulnerable system. The vulnerability is categorized under CWE-79 which defines improper neutralization of input during web output, making it a direct descendant of the well-known web application security weakness that has plagued countless systems since the early days of web development.
The technical exploitation of this vulnerability occurs when the application fails to properly sanitize or encode user-supplied input from the genres_parent parameter before incorporating it into dynamically generated web pages. When an attacker crafts a malicious payload containing script tags or other HTML elements and submits it through this parameter, the vulnerable application processes the input without adequate validation mechanisms. This processing allows the malicious code to be executed within the context of other users' browsers, effectively enabling the attacker to perform actions on behalf of legitimate users. The vulnerability operates at the application layer and requires no special privileges to exploit, making it particularly dangerous in environments where users have varying levels of access rights. The flaw aligns with ATT&CK technique T1059.007 which describes the use of scripting languages for execution, specifically targeting web-based scripting environments.
The operational impact of CVE-2009-3751 extends beyond simple data theft or defacement, as it creates a persistent backdoor for attackers to maintain access to compromised systems. Once exploited, the vulnerability can enable session hijacking, credential theft, or redirection to malicious websites that can further compromise the user's browsing environment. The attack surface is particularly concerning because it affects the core home page functionality, meaning that any user visiting the affected page could potentially be compromised. Organizations running Opial 1.0 systems face significant risk of unauthorized data access and potential system compromise, especially when the application is used in enterprise environments where sensitive information might be exposed through the XSS payload. The vulnerability's persistence means that even after the initial exploitation, the malicious code can continue to execute in subsequent user sessions, creating a long-term security threat that requires immediate remediation.
Mitigation strategies for CVE-2009-3751 must focus on implementing robust input validation and output encoding mechanisms throughout the application's codebase. The primary defense involves sanitizing all user input through proper validation techniques that reject or escape potentially dangerous characters and sequences before processing them. Organizations should implement Content Security Policy headers to limit the execution of inline scripts and restrict the sources from which scripts can be loaded. Additionally, the application should employ proper output encoding for all dynamic content, ensuring that any user-supplied data is rendered safely within HTML contexts. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other parameters and scripts within the application. The fix typically involves updating to a newer version of Opial that addresses this specific vulnerability or implementing custom patches that properly validate and sanitize the genres_parent parameter. Organizations should also consider implementing web application firewalls that can detect and block common XSS attack patterns, though this should be viewed as a supplementary measure rather than a complete solution. The remediation process should include thorough testing to ensure that the fix does not introduce new functionality issues while effectively closing the security gap.