CVE-2008-6522 in OpenTerracotta
Summary
by MITRE
Multiple directory traversal vulnerabilities in the RenderFile function in ContentRender.class.php in Terracotta (aka OpenTerracotta) 0.6.1, and possibly other versions, allow remote attackers to list arbitrary directories and read arbitrary files via a .. (dot dot) in the (1) CurrentDirectory and (2) File parameters to index.php.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/24/2025
The vulnerability CVE-2008-6522 represents a critical directory traversal flaw in Terracotta version 0.6.1 and potentially other iterations, specifically affecting the ContentRender.class.php component. This vulnerability resides within the RenderFile function which processes file operations through the index.php interface. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied directory paths, allowing malicious actors to exploit the system's file handling capabilities through crafted requests containing directory traversal sequences.
The technical implementation of this vulnerability leverages the .. (dot dot) sequence commonly known as path traversal or directory traversal attacks, which enables attackers to navigate outside the intended directory boundaries. When the CurrentDirectory and File parameters in index.php receive input containing these traversal sequences, the system processes them without proper validation, resulting in unauthorized access to arbitrary directories and file reading capabilities. This vulnerability directly maps to CWE-22 which defines improper limitation of a pathname to a restricted directory, commonly referred to as path traversal or directory traversal attacks. The flaw exists because the application fails to implement proper input sanitization and path validation checks before processing user-provided file paths.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it provides attackers with the capability to enumerate entire directory structures and access sensitive files that should remain protected. An attacker can leverage this vulnerability to list directory contents, read configuration files, access source code repositories, and potentially obtain credentials or other sensitive data stored within the application's directory structure. This represents a severe privilege escalation vector that can lead to complete system compromise, as attackers can access not only application files but also system files and configuration data that may contain database credentials, application secrets, or other critical information. The vulnerability operates at the application layer and can be exploited remotely without requiring authentication, making it particularly dangerous for publicly accessible web applications.
The attack surface for this vulnerability is significant given that Terracotta is a content management system that typically handles user-generated content and file operations. The vulnerability affects not just the immediate file system access but can potentially lead to further exploitation chains including code execution if sensitive files containing executable code or configuration data are accessed. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) as attackers can enumerate system files and potentially gain access to sensitive data. Organizations should implement immediate mitigations including input validation, proper path normalization, and implementing secure file access controls to prevent unauthorized directory traversal. The remediation approach should focus on implementing strict input validation, using secure coding practices, and ensuring that all user-supplied paths are properly sanitized before being processed by the application. Additionally, implementing proper access controls and restricting file system access to only necessary directories can significantly reduce the impact of such vulnerabilities.