CVE-2008-0814 in TRUC
Summary
by MITRE
Directory traversal vulnerability in download.php in Tracking Requirements & Use Cases (TRUC) 0.11.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the upload_filename parameter.
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Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2008-0814 represents a critical directory traversal flaw within the Tracking Requirements & Use Cases (TRUC) version 0.11.0 web application. This weakness resides in the download.php script which fails to properly validate user input submitted through the upload_filename parameter. The vulnerability enables remote attackers to access arbitrary files on the server by exploiting the .. (dot dot) sequence commonly used to navigate up directory levels in file systems. This type of vulnerability falls under the category of CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The technical implementation of this vulnerability occurs when the application processes the upload_filename parameter without adequate sanitization or validation. When an attacker submits a malicious payload containing .. sequences, the application interprets these as directory navigation commands rather than as part of a filename. This allows the attacker to traverse the file system hierarchy and access files that should remain protected, potentially including configuration files, database credentials, source code, or other sensitive data. The flaw demonstrates a fundamental lack of input validation and proper file access controls within the application's file handling mechanisms.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the potential to escalate their privileges and compromise the entire web application environment. An attacker could leverage this vulnerability to access sensitive system files, including but not limited to database connection strings, application configuration files, or even system-level files that contain authentication credentials. The vulnerability is particularly dangerous because it allows for arbitrary file reading, meaning there are no restrictions on which files can be accessed, potentially exposing the complete application infrastructure and underlying system resources. This aligns with ATT&CK technique T1083, which describes the discovery of files and directories, and T1566, which covers the exploitation of vulnerabilities in web applications.
Mitigation strategies for CVE-2008-0814 must address the core issue of improper input validation and implement robust security controls to prevent directory traversal attacks. Organizations should implement proper input sanitization by filtering or rejecting any input containing .. sequences or other path traversal indicators. The application should employ absolute path validation techniques that ensure all file operations occur within predefined safe directories. Additionally, implementing proper access controls and privilege separation can limit the damage that can be caused by such vulnerabilities. Security patches should be applied immediately to update TRUC to versions that address this vulnerability, as the flaw exists in the application's core file handling logic. System administrators should also implement web application firewalls and intrusion detection systems to monitor for suspicious file access patterns that may indicate exploitation attempts. The vulnerability highlights the importance of following secure coding practices and implementing proper input validation as recommended in OWASP Top Ten and NIST Cybersecurity Framework guidelines, particularly focusing on the principle of least privilege and defense in depth strategies to prevent unauthorized access to sensitive system resources.