CVE-2015-9244 in MySQL Module
Summary
by MITRE
Keys of objects in mysql node module v2.0.0-alpha7 and earlier are not escaped with `mysql.escape()` which could lead to SQL Injection.
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Analysis
by VulDB Data Team • 03/17/2023
The vulnerability identified as CVE-2015-9244 affects the mysql node module version 2.0.0-alpha7 and earlier, presenting a critical security risk through improper handling of object keys in SQL query construction. This flaw represents a classic SQL injection vulnerability that arises from inadequate input sanitization within the database abstraction layer. The vulnerability specifically targets the escape function implementation where object keys are not properly escaped using mysql.escape() before being incorporated into SQL statements. This oversight creates a pathway for malicious actors to inject arbitrary SQL code through crafted object keys that bypass normal input validation mechanisms.
The technical implementation flaw stems from the module's handling of JavaScript object properties when constructing dynamic SQL queries. When developers pass JavaScript objects to the mysql module for query building, the module processes object keys without applying proper escaping mechanisms. This behavior directly violates secure coding principles and creates an attack surface where malicious input can be interpreted as SQL syntax rather than literal data values. The vulnerability is particularly dangerous because it operates at the abstraction layer between JavaScript and SQL, making it difficult for developers to identify and prevent without explicit knowledge of the underlying implementation details.
From an operational impact perspective, this vulnerability enables attackers to perform unauthorized database operations including data exfiltration, data manipulation, and potential privilege escalation. The attack vector allows adversaries to inject malicious SQL fragments through object keys, potentially leading to complete database compromise. This vulnerability affects applications that rely on dynamic query building using JavaScript objects, making it particularly prevalent in web applications that use node.js with mysql database connections. The risk is amplified in environments where applications handle sensitive data without proper input validation or where the database user has elevated privileges.
The vulnerability aligns with CWE-89, which describes SQL injection flaws where untrusted data is incorporated into SQL commands without proper escaping or validation. It also maps to ATT&CK technique T1190, which covers exploit public-facing applications through SQL injection attacks. Organizations using affected versions of the mysql node module face significant risk of data breaches and compliance violations, particularly in regulated environments such as those governed by PCI DSS or HIPAA. The vulnerability demonstrates the critical importance of proper input sanitization in database abstraction layers and highlights the need for comprehensive security testing of third-party libraries. Mitigation strategies include upgrading to patched versions of the mysql module, implementing proper input validation at multiple layers, and conducting regular security assessments of application dependencies. Additionally, developers should adopt defensive programming practices such as using parameterized queries and avoiding direct object key interpolation in SQL statements to prevent similar vulnerabilities from occurring in custom implementations.