CVE-2006-6330 in TorrentFlux
Summary
by MITRE
index.php for TorrentFlux 2.2 allows remote registered users to execute arbitrary commands via shell metacharacters in the kill parameter.
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Analysis
by VulDB Data Team • 08/08/2024
The vulnerability identified as CVE-2006-6330 affects TorrentFlux 2.2, a popular open-source BitTorrent client management system that allows users to monitor and control torrent downloads through a web interface. This particular flaw resides in the index.php script which processes user requests and handles various administrative functions including the ability to kill or terminate running torrents. The vulnerability represents a critical command injection flaw that can be exploited by authenticated users to execute arbitrary system commands on the server hosting the TorrentFlux application. The issue stems from inadequate input validation and sanitization within the kill parameter processing functionality.
The technical implementation of this vulnerability occurs when a registered user submits a malicious value through the kill parameter in the index.php script. The application fails to properly sanitize user input before passing it to system execution functions, allowing shell metacharacters such as semicolons, pipes, or backticks to be interpreted by the underlying operating system shell. This creates a classic command injection attack vector where an attacker can append additional commands to the existing system call, effectively gaining unauthorized execution privileges on the server. The vulnerability specifically targets the kill functionality which is designed to terminate torrent processes, but due to improper input handling, the system executes arbitrary commands instead of just terminating torrents.
From an operational perspective, this vulnerability presents a severe risk to systems running TorrentFlux 2.2 as it allows remote authenticated attackers to escalate their privileges and potentially compromise the entire server infrastructure. Attackers can leverage this vulnerability to execute system commands such as reading sensitive files, creating new user accounts, installing malware, or even gaining shell access to the underlying operating system. The impact extends beyond simple command execution as it can lead to complete system compromise, data exfiltration, and potential lateral movement within network environments where the vulnerable system resides. This vulnerability directly aligns with CWE-77 and CWE-94 categories, representing improper input validation and command injection flaws respectively, and maps to attack patterns documented in the MITRE ATT&CK framework under T1059.001 for command and scripting interpreter.
The exploitation of this vulnerability requires minimal prerequisites as it only necessitates a registered user account with access to the TorrentFlux web interface, making it particularly dangerous in environments where user access is not properly restricted or monitored. Organizations should implement immediate mitigations including input validation and sanitization of all user-supplied parameters, implementing proper parameterized execution for system calls, and applying the latest security patches from the TorrentFlux development team. Additional protective measures include restricting administrative functions to specific IP addresses, implementing web application firewalls, and conducting regular security audits to identify similar input validation vulnerabilities in other components of the application. The vulnerability demonstrates the critical importance of proper input sanitization and output encoding practices in web applications, particularly those handling system-level operations, and serves as a reminder of the potential consequences when security controls are insufficiently implemented.