CVE-2019-19595 in Stock API
Summary
by MITRE
reset/modules/advanced_form_maker_edit/multiupload/upload.php in the RESET.PRO Adobe Stock API integration 4.8 for PrestaShop allows remote attackers to execute arbitrary code by uploading a .php file.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 03/07/2024
The vulnerability identified as CVE-2019-19595 represents a critical remote code execution flaw within the RESET.PRO Adobe Stock API integration module for PrestaShop version 4.8. This security weakness resides in the file reset/modules/advanced_form_maker_edit/multiupload/upload.php which fails to properly validate file uploads, creating an avenue for malicious actors to compromise affected systems. The module's improper handling of file type verification allows attackers to bypass security measures and upload malicious PHP files directly to the web server. This vulnerability specifically affects e-commerce platforms running PrestaShop with the vulnerable module installed, exposing online stores to potential compromise and unauthorized access.
The technical implementation of this flaw stems from inadequate input validation and sanitization within the file upload functionality. The upload.php script does not perform sufficient checks to verify the actual content type of uploaded files, relying instead on potentially manipulated file extensions. Attackers can exploit this by crafting malicious PHP payloads with .php extensions and uploading them through the vulnerable interface. The lack of proper file type validation creates a path for attackers to execute arbitrary code on the target server with the privileges of the web application. This issue aligns with CWE-434 which categorizes insecure file upload vulnerabilities as a significant security risk. The vulnerability enables attackers to gain persistent access to the web server and potentially escalate privileges to compromise the entire hosting environment.
The operational impact of CVE-2019-19595 extends beyond simple code execution, potentially allowing attackers to establish backdoors, exfiltrate sensitive customer data, and manipulate e-commerce transactions. Given that this affects PrestaShop installations, which host thousands of online stores, the potential attack surface is substantial. Attackers could leverage this vulnerability to inject malware, steal payment information, or redirect customers to malicious sites. The compromise of a single e-commerce platform could lead to widespread data breaches affecting numerous customers and businesses. This vulnerability also provides a persistent foothold for attackers to maintain access over extended periods, making it particularly dangerous for online retailers that process sensitive financial information. The attack vector directly aligns with ATT&CK technique T1059 which describes execution through command and scripting interpreters, specifically targeting web application environments.
Mitigation strategies for this vulnerability require immediate action including patching the affected module to version 4.9 or later which contains proper file validation mechanisms. System administrators should implement comprehensive file upload restrictions including MIME type validation, file extension filtering, and proper sanitization of uploaded content. The module should be configured to store uploaded files outside the web root directory and implement proper access controls to prevent direct execution of uploaded files. Additional security measures include implementing web application firewalls to detect and block suspicious upload attempts, conducting regular security audits of installed modules, and monitoring file system changes for unauthorized uploads. Organizations should also consider implementing principle of least privilege access controls and regular security assessments to identify similar vulnerabilities in other components of their e-commerce infrastructure. The remediation process should include thorough testing of patched modules to ensure continued functionality while eliminating the security risk.