CVE-2006-6598 in torrentflux-b4rt
Summary
by MITRE
Directory traversal vulnerability in viewnfo.php in (1) TorrentFlux before 2.2 and (2) torrentflux-b4rt before 2.1-b4rt-972 allows remote authenticated users to read arbitrary files via .. (dot dot) sequences in the path parameter, a different vector than CVE-2006-6328.
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Analysis
by VulDB Data Team • 08/11/2024
The vulnerability identified as CVE-2006-6598 represents a directory traversal flaw affecting two prominent torrent management applications TorrentFlux and torrentflux-b4rt. This security weakness resides in the viewnfo.php component of these applications, where improper input validation allows malicious actors to access arbitrary files on the server filesystem. The vulnerability specifically manifests when the path parameter contains .. (dot dot) sequences, enabling attackers to navigate beyond the intended directory boundaries and retrieve sensitive files from the system. Unlike CVE-2006-6328 which addressed a similar issue, this vulnerability operates through a distinct attack vector that exploits the specific implementation of file path handling within these torrent management platforms.
The technical exploitation of this directory traversal vulnerability occurs through authenticated user sessions, meaning attackers must first establish valid credentials to the application before attempting to leverage the flaw. When a user submits a path parameter containing directory traversal sequences such as ../../etc/passwd, the application fails to properly sanitize or validate the input before processing file operations. This inadequate input validation creates a condition where the application interprets the malicious path and attempts to access files outside of the designated application directories, potentially exposing system files, configuration data, or other sensitive information stored on the server. The vulnerability falls under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple information disclosure, as successful exploitation could potentially lead to complete system compromise. Attackers with authenticated access could retrieve critical system files including password databases, configuration files containing database credentials, application source code, and other sensitive data that could aid in further attacks. The vulnerability affects versions prior to 2.2 for TorrentFlux and 2.1-b4rt-972 for torrentflux-b4rt, indicating that these specific releases contained insufficient input validation mechanisms to prevent malicious path manipulation. Organizations running affected versions face significant risk, particularly in environments where the applications are accessible over the internet or where user accounts may be compromised. The authentication requirement does not mitigate the risk entirely, as compromised accounts or privilege escalation attacks could still enable exploitation.
Mitigation strategies for this vulnerability involve multiple layers of security controls and system hardening measures. The primary remediation approach requires immediate upgrade to patched versions of TorrentFlux and torrentflux-b4rt where input validation has been properly implemented to prevent directory traversal attempts. System administrators should also implement input sanitization measures that validate and filter all user-supplied path parameters, ensuring that any occurrence of .. sequences or similar traversal patterns are rejected or properly handled. Network segmentation and access control measures should be implemented to limit exposure of these applications to untrusted networks, while also enforcing strict authentication controls and monitoring for suspicious activities. Additionally, regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other applications and systems within the organization. The vulnerability demonstrates the importance of proper input validation and the principle of least privilege in application security, where all user inputs should be carefully examined and validated before processing to prevent unauthorized access to system resources.