CVE-2018-14020 in Paymorrow Module
Summary
by MITRE
An issue was discovered in the Paymorrow module 1.0.0 before 1.0.2 and 2.0.0 before 2.0.1 for OXID eShop. An attacker can bypass delivery-address change detection if the payment module doesn't use eShop's checkout procedure properly. To do so, the attacker must change the delivery address to one that is not verified by the Paymorrow module.
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Analysis
by VulDB Data Team • 03/17/2020
The vulnerability identified as CVE-2018-14020 affects the Paymorrow payment module for OXID eShop versions 1.0.0 through 1.0.1 and 2.0.0 through 2.0.0, representing a critical security flaw in the e-commerce platform's payment processing architecture. This issue stems from improper validation of delivery address changes within the payment module's integration with the core eShop functionality, creating a significant bypass opportunity for malicious actors seeking to manipulate transaction outcomes. The vulnerability operates at the intersection of payment processing and address verification mechanisms, where the Paymorrow module fails to properly enforce address validation when payment transactions are processed outside the standard checkout workflow.
The technical flaw manifests when an attacker manipulates the delivery address associated with a payment transaction by selecting an unverified address that bypasses the Paymorrow module's address validation checks. This occurs because the payment module does not adequately integrate with OXID eShop's built-in address verification procedures, allowing attackers to circumvent the system's intended security controls. The vulnerability specifically targets the address change detection mechanism, which should normally prevent modifications to delivery information during payment processing to maintain transaction integrity and prevent fraud. When the payment module fails to properly validate address changes, it creates a scenario where unauthorized address modifications can occur without proper verification, potentially leading to fraudulent transactions or unauthorized access to payment processing functions.
The operational impact of this vulnerability extends beyond simple payment manipulation to potentially enable broader fraud scenarios within the e-commerce environment. Attackers could exploit this flaw to redirect shipments to addresses they control, potentially facilitating fraud schemes or unauthorized access to payment processing systems. The vulnerability's exploitation requires minimal technical skill and can be executed through standard web application manipulation techniques, making it particularly dangerous in production environments where payment transactions occur regularly. This weakness essentially undermines the integrity of the payment verification process by allowing bypass of address validation controls that are critical for preventing fraudulent transactions and maintaining customer trust in the payment system.
Security mitigations for this vulnerability should focus on implementing proper integration with OXID eShop's core address validation mechanisms and ensuring that payment modules enforce strict address verification procedures regardless of how transactions are initiated. Organizations should upgrade to the patched versions 1.0.2 and 2.0.1 of the Paymorrow module immediately to prevent exploitation. Additionally, implementing proper input validation, address verification checks, and monitoring for unauthorized address changes during payment processing can help detect and prevent exploitation attempts. This vulnerability aligns with CWE-284 Access Control Issues and represents a significant concern for the ATT&CK framework's privilege escalation and defense evasion techniques, particularly in how it allows attackers to bypass security controls that should normally prevent unauthorized modifications to payment transaction parameters. The flaw demonstrates the critical importance of proper integration between third-party payment modules and core e-commerce platform security controls to maintain overall system integrity and prevent fraud.