CVE-2006-5315 in registroTL
Summary
by MITRE
PHP remote file inclusion vulnerability in main.php in registroTL allows remote attackers to execute arbitrary PHP code via an ftp:// URL in the page parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability described in CVE-2006-5315 represents a critical remote file inclusion flaw in the registroTL web application that exposes systems to arbitrary code execution. This vulnerability specifically affects the main.php script where user input is directly incorporated into a file inclusion operation without proper validation or sanitization. The flaw occurs when the application accepts a page parameter that is subsequently used in an include or require statement, creating an opportunity for attackers to inject malicious file paths.
The technical exploitation of this vulnerability relies on the PHP application's ability to process remote file inclusion requests through protocols such as ftp://, which allows attackers to specify external URLs as file sources. When an attacker crafts a malicious URL with an ftp:// prefix and injects it into the page parameter, the vulnerable application will attempt to fetch and execute the remote file as if it were a local PHP script. This creates a pathway for attackers to execute arbitrary PHP code on the target server, potentially leading to complete system compromise. The vulnerability is classified as a remote code execution flaw that operates at the application layer, making it particularly dangerous as it requires no local access or authentication.
From an operational impact perspective, this vulnerability presents a severe threat to web application security and can result in complete system compromise, data exfiltration, and persistent backdoor access. Attackers can leverage this flaw to upload malicious PHP shells, modify application behavior, steal sensitive information, or establish persistent access points within the network infrastructure. The vulnerability affects the confidentiality, integrity, and availability of the affected systems, as unauthorized parties can manipulate the application's functionality and potentially use the compromised server as a launching point for further attacks. This type of vulnerability is particularly concerning in environments where web applications handle sensitive data or serve as entry points to larger network infrastructures.
The remediation strategy for this vulnerability requires immediate implementation of input validation and sanitization measures to prevent untrusted data from being used in file inclusion operations. Organizations should implement proper parameter validation that rejects or encodes potentially dangerous input patterns, particularly those containing protocol prefixes such as ftp://, http://, or other remote access schemes. The application should be updated to use whitelisting approaches for file inclusion parameters, where only predefined, safe filenames are accepted. Additionally, the principle of least privilege should be enforced by configuring PHP to disable remote file inclusion features through appropriate configuration settings. This vulnerability aligns with CWE-98, which describes improper input validation in file inclusion operations, and maps to attack techniques in the MITRE ATT&CK framework under T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter. Organizations should also implement web application firewalls and security monitoring to detect and prevent exploitation attempts, while ensuring regular security updates and vulnerability assessments are conducted to maintain application security posture.