CVE-2006-5314 in TribunaLibre
Summary
by MITRE
PHP remote file inclusion vulnerability in ftag.php in TribunaLibre 3.12 Beta allows remote attackers to execute arbitrary PHP code via a URL in the mostrar parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability described in CVE-2006-5314 represents a critical remote file inclusion flaw affecting TribunaLibre 3.12 Beta software. This issue specifically targets the ftag.php component where the mostrar parameter fails to properly validate or sanitize user input, creating an avenue for malicious actors to inject and execute arbitrary PHP code on the affected server. The vulnerability stems from the application's improper handling of dynamic file inclusion mechanisms, allowing attackers to manipulate the parameter value to reference external URLs containing malicious code.
From a technical perspective, this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an SQL command, and more specifically CWE-94, which covers the execution of arbitrary code or commands. The flaw operates by accepting unvalidated input through the mostrar parameter and directly incorporating it into file inclusion operations without adequate sanitization or validation. This creates a path for attackers to inject URLs pointing to malicious PHP scripts hosted on remote servers, effectively enabling remote code execution capabilities.
The operational impact of this vulnerability is severe and multifaceted, as it allows remote attackers to gain complete control over the affected web server. Once exploited, adversaries can execute arbitrary commands, access sensitive data, install backdoors, or use the compromised system as a launching point for further attacks within the network infrastructure. The vulnerability affects the confidentiality, integrity, and availability of the targeted system, making it a significant concern for organizations relying on TribunaLibre for content management or web publishing functions.
From an ATT&CK framework perspective, this vulnerability maps to T1059.007 for execution through PHP, T1041 for data exfiltration, and T1078 for legitimate credential use. The attack chain typically begins with reconnaissance to identify vulnerable systems, followed by exploitation using the remote file inclusion technique, and concludes with privilege escalation or lateral movement within the compromised environment. Organizations should implement immediate mitigations including input validation, parameter sanitization, and the removal of vulnerable file inclusion patterns in their applications.
Mitigation strategies should focus on implementing strict input validation mechanisms that prevent the inclusion of external URLs or unauthorized file paths. The recommended approach includes disabling remote file inclusion features, implementing whitelisting for acceptable parameter values, and using secure coding practices that avoid dynamic file inclusion without proper sanitization. Additionally, organizations should consider implementing web application firewalls, regular security assessments, and maintaining up-to-date patches for all software components to prevent exploitation of similar vulnerabilities. The vulnerability also highlights the importance of following secure coding guidelines such as those outlined in OWASP Top Ten and the SANS Institute's secure coding practices to prevent such issues in future development cycles.