CVE-2017-18592 in woocommerce-catalog-enquiry Plugin
Summary
by MITRE
The woocommerce-catalog-enquiry plugin before 3.1.0 for WordPress has an incorrect wp_upload directory for file uploads.
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Analysis
by VulDB Data Team • 12/04/2023
The vulnerability identified as CVE-2017-18592 affects the woocommerce-catalog-enquiry plugin version 3.1.0 and earlier within the WordPress ecosystem. This issue stems from improper handling of file upload directories, specifically related to the wp_upload directory configuration. The plugin fails to properly validate or restrict file upload locations, creating a potential security risk that could be exploited by malicious actors. The problem manifests when users attempt to upload files through the plugin's catalog inquiry functionality, where the system incorrectly processes the upload destination path. This misconfiguration allows for unauthorized file placement within the WordPress installation's upload directory structure.
The technical flaw resides in the plugin's inadequate input validation and directory handling mechanisms. When processing file uploads, the woocommerce-catalog-enquiry plugin does not properly sanitize or verify the target upload path, potentially allowing attackers to manipulate the file storage location. This vulnerability falls under the category of improper file handling and directory traversal issues, which are commonly classified as CWE-22 - Improper Limitation of a Pathname to a Restricted Directory. The flaw essentially creates an insecure direct object reference scenario where the plugin does not properly enforce access controls on file upload destinations. The vulnerability is particularly concerning because it operates within the WordPress environment where the wp_upload directory typically contains user-generated content and can be leveraged for further exploitation.
The operational impact of this vulnerability extends beyond simple file placement concerns. Attackers could potentially upload malicious files to the wp_upload directory, which might then be executed if the directory is accessible through the web server. This creates a potential attack surface for web shells, malware, or other malicious payloads that could compromise the entire WordPress installation. The vulnerability enables arbitrary file upload capabilities, which can lead to complete system compromise through techniques such as web shell deployment or privilege escalation attacks. The risk is exacerbated by the fact that the plugin operates within the WordPress framework where file permissions and access controls are typically less restrictive than in dedicated applications, making the exploitation of such vulnerabilities more straightforward.
Mitigation strategies for CVE-2017-18592 should prioritize immediate plugin updates to version 3.1.0 or later, which contain the necessary fixes for the upload directory handling. System administrators should also implement additional security measures including restricting file upload permissions within the wp_upload directory, implementing proper access controls, and monitoring for unauthorized file uploads. The remediation process should include verifying that all plugin files are properly updated and that the upload directory configuration adheres to WordPress security best practices. Organizations should also consider implementing web application firewalls to monitor and block suspicious file upload attempts, as well as establishing regular security audits to identify similar vulnerabilities in other plugins or themes. This vulnerability aligns with ATT&CK technique T1190 - Exploit Public-Facing Application, as it represents an attack vector through a publicly accessible WordPress plugin component that can be exploited to gain unauthorized access to system resources.
The vulnerability demonstrates the critical importance of proper input validation and secure file handling in web applications. WordPress plugins that handle user uploads must implement robust validation mechanisms to prevent directory traversal attacks and ensure that all file operations occur within intended boundaries. The issue highlights the need for comprehensive security testing of third-party plugins, particularly those that interact with file systems or user input. Organizations should maintain updated inventories of all installed plugins and regularly verify their security status against known vulnerability databases. This vulnerability serves as a reminder that even seemingly simple functionality like catalog inquiries can present significant security risks when not properly secured against common attack patterns. The remediation process should also include implementing proper logging mechanisms to detect and respond to unauthorized file upload activities, as well as establishing incident response procedures for handling potential exploitation attempts.