CVE-2017-16223 in nodeaaaaa
Summary
by MITRE
nodeaaaaa is a static file server. nodeaaaaa is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url.
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Analysis
by VulDB Data Team • 02/16/2020
The vulnerability identified as CVE-2017-16223 affects nodeaaaaa, a static file server implementation that suffers from a critical directory traversal flaw. This security weakness allows malicious actors to access arbitrary files on the underlying filesystem by manipulating URL parameters through the strategic insertion of "../" sequences. The vulnerability stems from insufficient input validation and path sanitization within the server's file access mechanisms, creating an exploitable condition that bypasses normal file system access controls.
This directory traversal vulnerability represents a fundamental flaw in the application's security architecture and aligns with CWE-22, which categorizes improper limitation of a pathname to a restricted directory. The issue occurs because the server fails to properly validate or sanitize user-supplied input that forms part of the file path, allowing attackers to navigate upward through directory structures using the standard relative path traversal syntax. The impact extends beyond simple information disclosure, as successful exploitation can lead to complete system compromise through access to configuration files, application source code, and sensitive system resources.
The operational impact of this vulnerability is severe and multifaceted, particularly in environments where nodeaaaaa serves static content. Attackers can leverage this flaw to access not only user files but potentially system-critical components including database credentials, application secrets, and system configuration files. The vulnerability's exploitation requires minimal technical skill and can be accomplished through simple HTTP requests, making it particularly dangerous in production environments. From an adversarial perspective, this weakness provides a direct pathway for data exfiltration and can serve as a foothold for further attack escalation.
Mitigation strategies for CVE-2017-16223 should focus on implementing robust input validation and path normalization mechanisms within the static file server implementation. Organizations should immediately patch affected systems with the latest security updates provided by the software vendor, while also implementing additional defensive measures such as restricting file access permissions, employing web application firewalls, and conducting comprehensive security reviews of all file access pathways. The vulnerability demonstrates the critical importance of adhering to secure coding practices and following established security frameworks that address common attack patterns documented in the MITRE ATT&CK framework under the technique of "Path Traversal" and related file system access vulnerabilities.