CVE-2006-6768 in The Classified Ad System
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in default.asp in PWP Technologies The Classified Ad System allow remote attackers to inject arbitrary web script or HTML via the (1) cat or (2) main parameter.
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Analysis
by VulDB Data Team • 11/30/2024
The vulnerability identified as CVE-2006-6768 represents a critical cross-site scripting flaw within PWP Technologies The Classified Ad System, specifically affecting the default.asp component. This vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly filter user-supplied data before incorporating it into web responses. The flaw manifests in two distinct attack vectors through the cat and main parameters, which are commonly used for category navigation and main page content respectively, making the exploitation surface particularly broad. The vulnerability is categorized under CWE-79 as "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", which directly aligns with the core technical weakness present in this system.
The technical implementation of this vulnerability allows remote attackers to inject malicious scripts or HTML code through the affected parameters, enabling them to execute arbitrary code within the context of other users' browsers. When users navigate to pages that utilize these vulnerable parameters, the injected content gets executed without proper sanitization, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The attack requires no special privileges and can be executed through simple URL manipulation, making it particularly dangerous for widespread exploitation. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1531 for "Account Access Token Manipulation" and T1059 for "Command and Scripting Interpreter" when considering the potential for further exploitation through the executed malicious code.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to completely compromise user sessions and potentially gain access to administrative functions within the classified ad system. The default.asp file serves as a central entry point for the application, meaning that successful exploitation could affect multiple users simultaneously and potentially allow attackers to manipulate the entire classified advertising platform. Organizations using this system would face significant reputational damage, regulatory compliance issues, and potential financial losses due to compromised user data. The vulnerability's persistence in the system for an extended period without detection highlights the critical need for regular security assessments and input validation reviews. The exploitation of this flaw could lead to persistent malicious presence within the application, allowing attackers to maintain access and continue compromising user interactions over time, making it a particularly concerning security weakness for any organization relying on classified advertising platforms.
Mitigation strategies for CVE-2006-6768 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The most effective immediate solution involves sanitizing all user inputs through proper encoding techniques such as HTML entity encoding before rendering any dynamic content. Organizations should implement a whitelist-based approach to parameter validation, ensuring that only expected and safe input values are accepted. Additionally, deploying web application firewalls and implementing proper content security policies can provide additional layers of protection against exploitation attempts. Regular security audits and code reviews should be conducted to identify similar vulnerabilities within the application codebase, as this vulnerability represents a common pattern of insufficient input validation that frequently occurs in legacy web applications. The implementation of automatic vulnerability scanning tools and security testing procedures should be established to prevent similar issues from being introduced during future development cycles, aligning with industry best practices for secure software development lifecycle management.