CVE-2019-7947 in Magento
Summary
by MITRE
A cross-site request forgery vulnerability exists in the GiftCardAccount removal feature for Magento Open Source prior to 1.9.4.2, and Magento Commerce prior to 1.14.4.2, Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2.
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Analysis
by VulDB Data Team • 07/20/2020
This cross-site request forgery vulnerability in Magento's GiftCardAccount removal feature represents a critical security flaw that allows authenticated attackers to perform unauthorized actions on behalf of victims. The vulnerability specifically affects multiple versions of Magento Open Source and Commerce platforms, with affected versions including Magento 1.x prior to 1.9.4.2 and 1.14.4.2, as well as Magento 2.x versions prior to 2.1.18, 2.2.9, and 2.3.2. The flaw resides in the GiftCardAccount removal functionality where proper CSRF protection mechanisms are either missing or insufficiently implemented.
The technical implementation of this vulnerability stems from the absence of proper anti-CSRF tokens or validation mechanisms within the GiftCardAccount removal process. When a user accesses the gift card account removal feature, the application fails to validate that the request originates from a legitimate source within the same session. This allows an attacker to craft malicious requests that can be executed without the victim's knowledge or consent, leveraging the victim's authenticated session to perform actions such as removing gift cards from their account. The vulnerability operates at the application layer and requires authentication to exploit, making it particularly dangerous in environments where users maintain persistent sessions with elevated privileges.
The operational impact of this vulnerability extends beyond simple data manipulation as it can lead to financial loss through unauthorized gift card removal, potential account compromise, and disruption of legitimate user services. Attackers can exploit this weakness to drain gift card balances, effectively causing monetary damage to both customers and merchants. The vulnerability also creates opportunities for account takeover scenarios where attackers might combine this CSRF flaw with other techniques to gain deeper access to user accounts. This issue affects e-commerce platforms where gift cards are commonly used as payment methods, making it particularly relevant in retail and online commerce environments where such transactions occur regularly.
Security mitigations for this vulnerability primarily involve implementing proper CSRF token validation mechanisms throughout the application's request processing pipeline. Organizations should ensure that all state-changing operations, particularly those involving financial transactions or account modifications, include unique, unpredictable tokens that are validated on each request. The fix typically involves generating cryptographically secure tokens for each user session and validating these tokens against the expected values before processing any gift card removal requests. Additionally, implementing proper session management controls, including secure cookie attributes and session timeout mechanisms, can further reduce the attack surface. This vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery, and maps to ATT&CK technique T1548.002, which covers abuse of cloud services for privilege escalation. Organizations should also consider implementing Content Security Policy headers and other web application security controls to provide defense-in-depth against similar vulnerabilities. Regular security updates and patch management procedures are essential to maintain protection against known CSRF vulnerabilities in web applications.