CVE-2019-8903 in Total.js Platform
Summary
by MITRE
index.js in Total.js Platform before 3.2.3 allows path traversal.
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Analysis
by VulDB Data Team • 07/11/2023
The vulnerability identified as CVE-2019-8903 affects the Total.js Platform version 3.2.2 and earlier, specifically within the index.js file that handles file operations. This represents a critical path traversal vulnerability that enables attackers to access files and directories outside the intended scope of the application. The flaw occurs when the platform processes user-supplied input without proper sanitization or validation, allowing malicious actors to manipulate file paths and gain unauthorized access to sensitive system resources. Such vulnerabilities are particularly dangerous in web applications where user input is frequently processed and can be exploited to bypass security controls and access restricted areas of the file system.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the Total.js framework's file handling capabilities. When the platform processes requests containing file paths, it fails to properly sanitize or restrict user-provided input, creating opportunities for attackers to craft malicious paths that traverse directories using sequences like "../". This type of flaw directly maps to CWE-22 Path Traversal vulnerability classification, which is categorized under the broader category of input validation weaknesses. The vulnerability is particularly concerning because it operates at the core file system interaction layer, potentially allowing attackers to access configuration files, source code, database credentials, or other sensitive information stored on the server.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can enable more sophisticated attacks including remote code execution, data exfiltration, and system compromise. Attackers can leverage this vulnerability to enumerate the file system, access application configuration files that may contain database credentials or API keys, and potentially gain access to other system resources. According to ATT&CK framework, this vulnerability aligns with T1083 File and Directory Discovery techniques, where adversaries explore the file system to identify sensitive data. The impact is particularly severe for web applications running on the affected platform, as it can lead to complete system compromise and unauthorized access to all data stored on the server. Organizations using Total.js Platform versions prior to 3.2.3 face significant risk of data breaches and system infiltration.
Mitigation strategies for this vulnerability require immediate patching of the Total.js Platform to version 3.2.3 or later, which includes proper input validation and sanitization mechanisms. Organizations should implement comprehensive input validation at all points where user-supplied data is processed, particularly in file handling operations. Additional defensive measures include implementing proper access controls, restricting file system permissions for application processes, and deploying web application firewalls that can detect and block path traversal attempts. Security monitoring should be enhanced to detect unusual file access patterns and potential exploitation attempts. Organizations should also conduct thorough security assessments of their Total.js applications to identify any other potential vulnerabilities in the codebase and ensure that all input parameters are properly validated before being used in file system operations. The vulnerability serves as a reminder of the critical importance of input validation in web applications and the potential consequences of inadequate security controls in server-side file handling operations.