CVE-2006-1634 in LucidCMS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in LucidCMS 2.0.0 RC4 allows remote attackers to inject arbitrary web script or HTML via the command parameter.
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Analysis
by VulDB Data Team • 07/22/2018
The vulnerability identified as CVE-2006-1634 represents a critical cross-site scripting flaw within LucidCMS version 2.0.0 RC4, specifically affecting the index.php script. This vulnerability resides in the handling of user-supplied input through the command parameter, creating a persistent security risk that enables remote attackers to execute malicious web scripts or HTML code within the context of affected users' browsers. The flaw demonstrates a classic input validation failure that permits unauthorized code injection into web applications.
This vulnerability operates through a direct injection mechanism where the command parameter in index.php fails to properly sanitize or escape user-provided input before processing. When a malicious actor crafts a specially formatted request containing script code within the command parameter, the web application processes this input without adequate validation or encoding, allowing the injected code to execute in the victim's browser context. The vulnerability specifically impacts the application's user interface rendering process, where untrusted input flows directly into HTML output without proper contextual escaping or sanitization.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform various malicious activities including session hijacking, credential theft, defacement of web content, and redirection to malicious sites. An attacker could leverage this flaw to steal administrator sessions, modify content, or create backdoor access points within the CMS. The vulnerability's remote nature means that exploitation requires no local access to the system, making it particularly dangerous as it can be triggered through web-based attacks. This weakness directly violates the principle of least privilege and proper input validation, creating an attack surface that allows arbitrary code execution in the context of authenticated users.
Security controls for mitigating this vulnerability should focus on implementing robust input validation and output encoding mechanisms. The recommended approach involves applying strict parameter validation to ensure that the command parameter only accepts expected values and properly escaping all dynamic content before rendering it in HTML contexts. Organizations should implement Content Security Policy headers to limit script execution capabilities and deploy web application firewalls to detect and block suspicious input patterns. This vulnerability aligns with CWE-79 which describes cross-site scripting flaws, and corresponds to techniques described in the ATT&CK framework under T1059 for command and scripting interpreter. The remediation process requires immediate patching of the LucidCMS application to version 2.0.0 RC5 or later, along with comprehensive input validation implementation across all user-supplied parameters. System administrators should also conduct thorough security assessments to identify similar input handling vulnerabilities in other components and ensure proper security training for development teams regarding secure coding practices and the importance of input sanitization in web applications.
The vulnerability demonstrates how insufficient input validation can lead to severe security consequences in content management systems. The flaw represents a failure in the application's defense-in-depth strategy, where multiple layers of security controls should have prevented the injection of malicious code. Organizations should implement automated security testing including dynamic application security testing and static code analysis to identify similar vulnerabilities in their web applications. The remediation process must include not only patching the specific vulnerability but also establishing secure coding standards and conducting regular security audits to prevent similar issues from emerging in future development cycles.