CVE-2019-7890 in Magento
Summary
by MITRE
An Insecure Direct Object Reference (IDOR) vulnerability exists in the order processing workflow of Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. This can lead to unauthorized access to order details.
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Analysis
by VulDB Data Team • 07/20/2020
The vulnerability identified as CVE-2019-7890 represents a critical Insecure Direct Object Reference flaw within the Magento e-commerce platform that affects multiple version ranges including Magento 2.1.x prior to 2.1.18, Magento 2.2.x prior to 2.2.9, and Magento 2.3.x prior to 2.3.2. This type of vulnerability falls under CWE-284 which specifically addresses inadequate access control mechanisms that allow attackers to manipulate references to objects within the application. The flaw manifests within the order processing workflow where the system fails to properly validate user permissions before granting access to order details, creating a pathway for unauthorized individuals to bypass normal access controls and directly reference objects they should not be able to access.
The technical implementation of this vulnerability stems from insufficient input validation and access control checks within the order retrieval mechanisms. When users request order information through the web interface, the application relies on parameters that directly reference database objects without proper authorization verification. This allows malicious actors to manipulate these parameters and access order data belonging to other users simply by guessing or enumerating valid order identifiers. The vulnerability essentially removes the layer of abstraction that should exist between user requests and database objects, enabling direct object access that should be mediated through proper authentication and authorization checks.
The operational impact of this vulnerability extends beyond simple data exposure, creating significant risks for businesses utilizing affected Magento versions. Attackers can potentially access sensitive customer information including personal details, billing addresses, shipping information, and purchase history across multiple orders. This unauthorized access can lead to identity theft, fraud, and violation of privacy regulations such as gdpr and pci dss standards. The vulnerability also enables attackers to gain insights into business operations including customer purchasing patterns, inventory preferences, and seasonal buying behaviors that could be exploited for competitive advantage or targeted attacks.
Organizations affected by this vulnerability should immediately implement mitigations including applying the vendor-provided security patches for their specific Magento version ranges, implementing additional access control layers, and conducting thorough security audits of their order processing workflows. The remediation process should involve comprehensive testing of access control mechanisms to ensure that all object references are properly validated against user permissions before any data retrieval occurs. Additionally, implementing proper logging and monitoring of order access attempts can help detect anomalous behavior patterns that may indicate exploitation attempts. Organizations should also consider implementing additional security controls such as rate limiting and session management improvements to further reduce the attack surface and prevent automated exploitation of this vulnerability. This type of vulnerability demonstrates the critical importance of proper access control implementation and the potential consequences of inadequate validation of user permissions in web applications.