CVE-2019-7888 in Magento
Summary
by MITRE
An information disclosure vulnerability exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. An authenticated user with privileges to create email templates could leak sensitive data via a malicious email template.
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Analysis
by VulDB Data Team • 07/19/2020
This vulnerability represents a critical information disclosure flaw in the Magento e-commerce platform that affects multiple version ranges including Magento 2.1 before 2.1.18, Magento 2.2 before 2.2.9, and Magento 2.3 before 2.3.2. The vulnerability stems from insufficient input validation and sanitization within the email template creation functionality, creating a pathway for authenticated attackers to exploit the system and extract sensitive data. The flaw specifically manifests when an authenticated user with appropriate privileges attempts to create or modify email templates, allowing them to inject malicious code that can subsequently exfiltrate system information.
The technical implementation of this vulnerability resides in the improper handling of user-supplied data within the email template rendering engine. When users with template creation privileges submit malicious content, the system fails to properly sanitize the input before processing, enabling potential code injection attacks. This weakness creates a direct pathway for attackers to access sensitive information including but not limited to database connection details, system configuration parameters, and potentially user credentials. The vulnerability is classified under CWE-200 as "Information Disclosure" and represents a significant security gap in the platform's data protection mechanisms.
The operational impact of this vulnerability extends beyond simple data exposure, as it enables attackers to potentially escalate their privileges and access additional system resources. An authenticated attacker could leverage this vulnerability to gain insights into the underlying system architecture, database schemas, and configuration files that would otherwise remain protected. This information could then be used to plan more sophisticated attacks or to identify other potential vulnerabilities within the system. The attack vector requires minimal privileges and can be executed through standard user interface interactions, making it particularly dangerous as it can be exploited by both internal and external threat actors with legitimate access to the system.
Mitigation strategies should focus on immediate patching of affected versions to the latest available releases, which include proper input validation and sanitization measures. Organizations should implement strict access controls and privilege management to limit who can create or modify email templates, adhering to the principle of least privilege as recommended by the MITRE ATT&CK framework. Additionally, regular security auditing of email template functionality and input validation mechanisms should be conducted to prevent similar vulnerabilities from emerging. System administrators should also consider implementing network monitoring solutions to detect unusual data access patterns that might indicate exploitation attempts, and establish comprehensive logging mechanisms to track template creation activities for forensic analysis purposes.