CVE-2005-0495 in ZeroBoard
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in ZeroBoard allows remote attackers to inject arbitrary web script or HTML via the (1) sn1, (2) year, or (3) page parameter to zboard.php or (4) filename to view_image.php.
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Analysis
by VulDB Data Team • 05/30/2019
The vulnerability described in CVE-2005-0495 represents a classic cross-site scripting flaw within the ZeroBoard content management system that has significant implications for web application security. This vulnerability exists in the way the application processes user input through specific HTTP parameters, creating an avenue for malicious actors to execute arbitrary code within the context of other users' browsers. The affected parameters include sn1, year, page in the zboard.php file and filename in the view_image.php file, all of which are processed without adequate input validation or output encoding mechanisms. The vulnerability falls under the Common Weakness Enumeration category CWE-79, which specifically addresses improper neutralization of input during web page generation, making it a well-documented and widely recognized security weakness in web applications. From an operational perspective, this XSS vulnerability enables attackers to inject malicious scripts that can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to complete account compromise and unauthorized access to sensitive data.
The technical exploitation of this vulnerability requires minimal sophistication and can be achieved through various methods including the insertion of javascript code, html tags, or other malicious payloads within the vulnerable parameters. Attackers can craft specially formatted URLs that, when visited by victims, execute the injected code in the victim's browser context. The impact extends beyond simple script injection as it can be leveraged to create persistent XSS attacks that remain active until the vulnerable application is patched or the affected parameters are modified. This vulnerability particularly affects web applications that do not properly sanitize user input before rendering it in web pages, creating an environment where attacker-controlled data can be executed as code. The attack surface is broadened by the fact that multiple parameters across different files are affected, increasing the likelihood of successful exploitation in various scenarios. Security professionals can identify this vulnerability through routine code reviews and automated scanning tools that detect improper input handling patterns, with the specific parameters mentioned providing clear indicators of potential XSS exposure. The vulnerability demonstrates the critical importance of implementing proper input validation and output encoding practices as recommended by the OWASP Top Ten and other industry security frameworks.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues. The most effective immediate solution involves implementing proper input validation and output encoding for all user-supplied data before it is rendered in web pages, a technique that aligns with the ATT&CK framework's defensive measures against web application attacks. Organizations should ensure that all parameters, particularly those handling dynamic content or file names, undergo rigorous sanitization processes that remove or encode potentially dangerous characters and script tags. The implementation of Content Security Policy headers provides an additional layer of protection by restricting the sources from which scripts can be loaded, making exploitation more difficult even if the underlying vulnerability persists. Regular security testing including penetration testing and automated vulnerability scanning should be conducted to identify similar issues across the entire application stack. Additionally, developers should follow secure coding practices that emphasize the principle of least privilege and input sanitization, ensuring that user data is never directly used in executable contexts without proper validation. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security practices and the need for comprehensive security training for development teams to prevent such flaws from being introduced in the first place. Organizations should also implement web application firewalls and monitoring systems that can detect and block suspicious parameter values that may indicate attempted XSS attacks, providing both preventive and detective controls against exploitation attempts.