Preventing SQL Injection SQLi in TypeScript-Based ERP Systems

SQL Injection (SQLi) remains a major security threat for web applications, including modern Enterprise Resource Planning (ERP) systems. By exploiting vulnerabilities in SQL queries, attackers can gain unauthorized access to sensitive data or manipulate database contents. This blog will guide you on how to identify and mitigate SQLi risks in a TypeScript-based ERP system using practical coding examples.

Additionally, we’ll showcase how our free Website Security checker tool can help you identify SQLi vulnerabilities and generate detailed vulnerability assessment reports.

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What is SQL Injection (SQLi)?

SQL Injection occurs when unsanitized user inputs are included directly in SQL queries, enabling attackers to execute malicious commands. A vulnerable system might look like this:

import { Request, Response } from "express";  
import { Database } from "./database"; // Hypothetical database module  

const getUserDetails = async (req: Request, res: Response) => {  
  const userId = req.query.userId;  
  const query = `SELECT * FROM users WHERE id = '${userId}';`; // Vulnerable to SQLi  
  const result = await Database.execute(query);  
  res.send(result);  
};  

If an attacker inputs 1'; DROP TABLE users;-- as the userId, the query becomes:

SELECT * FROM users WHERE id = '1'; DROP TABLE users;--';  

This results in catastrophic database changes.

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Preventing SQL Injection SQLi in TypeScript-Based ERP

To mitigate SQLi, follow these practices:

1. Use Parameterized Queries

Parameterized queries prevent SQLi by isolating query logic from input values. Here’s a safer version:

const getUserDetailsSecure = async (req: Request, res: Response) => {  
  const userId = req.query.userId;  
  const query = "SELECT * FROM users WHERE id = $1;";  
  const result = await Database.execute(query, [userId]);  
  res.send(result);  
};  

2. Validate and Sanitize Inputs

Ensure inputs conform to expected formats using libraries like validator:

import validator from "validator";  

const isValidUserId = (userId: string) => {  
  return validator.isUUID(userId);  
};  

3. Use ORM Tools

Object-Relational Mapping (ORM) tools like TypeORM or Sequelize abstract SQL queries, reducing injection risks:

import { getRepository } from "typeorm";  
import { User } from "./entities/User";  

const getUserDetailsORM = async (req: Request, res: Response) => {  
  const userId = req.query.userId;  
  const user = await getRepository(User).findOne({ where: { id: userId } });  
  res.send(user);  
};  

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How Our Tools Can Help

1. Website Security Checker

Here’s a sample SQL Injection vulnerability detection using our tool to test website security free:

2. Screenshot: Vulnerability Assessment Report

Below is a sample report from our tool that highlights SQLi risks:

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Related Resources

1. For insights into other critical vulnerabilities, explore our detailed blog on Cross-Site Scripting (XSS) in OpenCart.
2. Check out our previous post on Remote Code Execution (RCE) in RESTful APIs to understand similar security risks.
3. Head over to our recent post on Preventing Cross-Site Scripting (XSS) in TypeScript-Based ERP Systems.
4. Discover how we mitigated vulnerabilities in real-world scenarios in our case study.

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Conclusion

By adopting secure coding practices and leveraging tools like our free Website Security checker, you can safeguard your TypeScript-based ERP system against SQL Injection attacks. Protecting your application not only prevents data breaches but also builds trust with your users.

Stay tuned for more insights on securing web applications, and feel free to reach out for professional vulnerability assessment services.

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