CVE-2012-6632 in NetBill
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Vessio NetBill 1.2 allow remote attackers to inject arbitrary web script or HTML via the (1) full name or (2) file title to accounts/admin/index.php or (3) comment parameter in the support page to accounts/index2.php.
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Analysis
by VulDB Data Team • 03/04/2019
The vulnerability identified as CVE-2012-6632 represents a critical cross-site scripting flaw in Vessio NetBill version 1.2, a web-based billing and account management system. This vulnerability exposes the application to remote code execution through malicious script injection, potentially compromising user sessions and data integrity. The flaw manifests in three distinct attack vectors within the application's administrative interface and support functionality, creating multiple entry points for threat actors to exploit the system's input validation weaknesses.
The technical implementation of this vulnerability stems from insufficient input sanitization and output encoding within the application's core components. Attackers can manipulate three separate parameters to inject malicious scripts: the full name field in accounts/admin/index.php, the file title parameter in the same administrative interface, and the comment parameter within the support page located at accounts/index2.php. These parameters are processed without adequate validation or sanitization, allowing attackers to inject HTML and JavaScript code that executes in the context of other users' browsers. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, where insufficient validation of user-supplied input leads to unauthorized script execution.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform session hijacking, steal sensitive user information, manipulate administrative functions, and potentially escalate privileges within the system. When users view compromised pages containing malicious scripts, their browsers execute the injected code, which can capture cookies, redirect users to malicious sites, or perform unauthorized actions on their behalf. This vulnerability particularly affects the administrative interface, which could allow attackers to gain elevated privileges and compromise the entire billing system. The attack surface is broad due to the three distinct injection points, increasing the likelihood of successful exploitation and making the system particularly vulnerable to targeted attacks.
Mitigation strategies for CVE-2012-6632 require immediate implementation of comprehensive input validation and output encoding measures across all user-facing parameters. Organizations should implement strict sanitization of all input data, particularly in the identified vulnerable fields, using established security libraries and frameworks that automatically encode special characters to prevent script execution. The application should employ context-specific output encoding for all dynamic content, ensuring that any user-supplied data rendered in HTML contexts is properly escaped. Additionally, implementing a robust content security policy can provide defense-in-depth protection against XSS attacks. Regular security assessments and input validation reviews should be conducted to identify and remediate similar vulnerabilities. This vulnerability demonstrates the critical importance of following secure coding practices and adhering to OWASP Top Ten security guidelines, particularly those addressing input validation and output encoding, as outlined in the ATT&CK framework's web application attack patterns. The remediation process should include thorough code review, implementation of parameterized queries where applicable, and comprehensive testing of all user input handling mechanisms to ensure the vulnerability is fully resolved and cannot be re-exploited.