Bounty Security Pattern Auditor Pro 399-Pattern Security

I have completed the security audit of the provided Node.js API endpoint. Using the BSA pattern library, I identified a critical SQL injection vulnerability due to improper input sanitization.

Security Audit Report

Executive Summary

• Scope: Node.js Express API / Database Query Layer
• Relevant Patterns: Input Validation, SQL Injection, Data Access
• Findings: 1 Critical
• Remediation Priority: Immediate

Findings Matrix

Detailed Finding

Finding: Unsanitized URL parameter in SQL query
Pattern ID: BSA-102
CWE: CWE-89: Improper Neutralization of Special Elements used in an SQL Command
Severity: Critical
Confidence: High
Category: Injection
Location: app.get('/user/:id', ...) line 2
Evidence: The code directly concatenates req.params.id into the SQL string without parameterized queries or escaping.
False-Positive Checks: Checked for ORM/Query builder abstraction; none found. Input is sourced directly from a public route parameter.
Impact: Remote attackers can execute arbitrary SQL commands, leading to full database compromise or unauthorized data exfiltration.
Attack Preconditions: Access to the public /user/ endpoint.
Safe Validation: Attempt to pass a non-numeric string like '1 OR 1=1' in a local test environment and observe query construction in logs.
Remediation: Implement parameterized queries using the db.execute('SELECT * FROM users WHERE id = ?', [req.params.id]) syntax.
Regression Test: Add a unit test that passes a malicious string to the handler and asserts that the database driver receives a parameterized call rather than a concatenated string.

Next steps

• Update the database call to use prepared statements immediately.
• Implement a global input validation middleware (e.g., Joi or express-validator) to enforce UUID or integer types for ID parameters.
• Review all other db.execute calls in the repository for similar concatenation patterns.