CVE-2002-1926 in File Manager
Summary
by MITRE
Directory traversal vulnerability in source.php in Aquonics File Manager 1.5 allows remote attackers to read arbitrary files via a .. (dot dot) in the HTTP query string.
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Analysis
by VulDB Data Team • 07/06/2024
The vulnerability described in CVE-2002-1926 represents a classic directory traversal flaw within the Aquonics File Manager version 1.5, specifically affecting the source.php component. This weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data from HTTP query strings. The vulnerability allows malicious actors to exploit the application's file handling routines by injecting directory traversal sequences using the .. (dot dot) notation, thereby enabling unauthorized access to files outside the intended directory structure. Such flaws typically arise when applications directly incorporate user input into file system operations without proper sanitization or validation checks, creating opportunities for attackers to manipulate file paths and gain access to sensitive system resources.
This directory traversal vulnerability operates at the application layer and can be classified under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. The attack vector leverages the HTTP query string parameter passing mechanism, where the malicious .. sequences are appended to file path requests. When the Aquonics File Manager processes these requests, it fails to validate or sanitize the input before using it in file system operations, allowing the traversal to occur. The vulnerability essentially permits an attacker to navigate beyond the application's intended file access boundaries, potentially accessing system files, configuration data, or other sensitive information that should remain protected from unauthorized access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to access critical system resources including configuration files, database credentials, application source code, and potentially system binaries. Remote exploitation means that attackers do not require physical access to the system, making this vulnerability particularly dangerous for web applications accessible over networks. The vulnerability affects the confidentiality and integrity of the affected system, as unauthorized parties can read arbitrary files, potentially leading to further exploitation opportunities such as privilege escalation or additional attack vectors. This type of vulnerability can also facilitate reconnaissance activities where attackers gather information about the target system's configuration and file structure to plan more sophisticated attacks.
Mitigation strategies for CVE-2002-1926 should focus on implementing robust input validation and sanitization mechanisms within the Aquonics File Manager application. The most effective approach involves implementing proper path validation that prevents directory traversal sequences from being processed, including filtering out or rejecting any input containing .. sequences or similar traversal patterns. Additionally, applications should employ secure coding practices such as using allowlists of permitted file paths, implementing proper file access controls, and ensuring that all file operations occur within designated safe directories. Organizations should also consider implementing web application firewalls that can detect and block suspicious query string patterns, and regularly update and patch affected systems to address known vulnerabilities. The remediation process should include comprehensive code review to identify and eliminate similar issues throughout the application codebase, following secure coding guidelines that prevent the injection of unvalidated user input into file system operations. This vulnerability serves as a reminder of the importance of input validation and the principle of least privilege in web application security, aligning with security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines.