Add Javascript Files from javascript-CWE-78-os-command-injection - Batch 30#268
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Summary of ChangesHello @amazon-pratik, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a new batch of JavaScript files, specifically Highlights
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Security Review Summary
This PR adds JavaScript files containing critical security vulnerabilities that must be addressed before merging:
🚨 Critical Issues Found:
- OS Command Injection (CWE-78) - User input passed directly to Python subprocess without proper sanitization
- CORS Misconfiguration (CWE-346) - Allows all origins, creating CSRF attack vectors
- Configuration Security - Hardcoded placeholder MongoDB URI and missing environment validation
📋 Required Actions:
- Implement proper input sanitization for the
descriptionparameter - Restrict CORS to specific trusted origins
- Add proper environment variable validation
- Fix file path handling for Python script execution
Status: ❌ CHANGES REQUESTED - Critical security vulnerabilities must be resolved before merge.
You can now have the agent implement changes and create commits directly on your pull request's source branch. Simply comment with /q followed by your request in natural language to ask the agent to make changes.
| ageInt.toString(), | ||
| "Vega", | ||
| "False", | ||
| description, |
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🛑 Security Vulnerability: The description parameter is passed directly to the Python script without proper sanitization, creating an OS command injection vulnerability. The current validation only checks type and length but doesn't prevent shell metacharacters that could be exploited to execute arbitrary commands.
| description, | |
| description.replace(/[;&|`$(){}[\]\\]/g, ''), |
| if (!description || typeof description !== "string" || description.length > 100) { | ||
| return res.status(400).json({ error: "Invalid description input." }); |
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The input validation for description is insufficient for preventing command injection attacks. Add validation to reject shell metacharacters and consider using a whitelist approach for allowed characters.
| if (!description || typeof description !== "string" || description.length > 100) { | |
| return res.status(400).json({ error: "Invalid description input." }); | |
| if (!description || typeof description !== "string" || description.length > 100 || /[;&|`$(){}[\]\\]/.test(description)) { | |
| return res.status(400).json({ error: "Invalid description input. Special characters not allowed." }); |
| // Middlewares | ||
| app.use(express.json()); | ||
| app.use(cors({ | ||
| origin: process.env.CORS_ORIGIN || '*' // Allow all origins or restrict based on environment variable |
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🛑 Security Vulnerability: CORS is configured to allow all origins ('*') which creates a security risk. This allows any website to make requests to your API, potentially leading to CSRF attacks.
| origin: process.env.CORS_ORIGIN || '*' // Allow all origins or restrict based on environment variable | |
| origin: process.env.CORS_ORIGIN || '' // Restrict to specific trusted origins |
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| // MONGOOSE SETUP | ||
| const PORT = process.env.PORT || 3001; | ||
| const MONGO_URI = process.env.MONGO_URI || "your-default-mongodb-uri-here"; |
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🛑 Security Vulnerability: The default MongoDB URI contains placeholder text that could cause connection failures in production. This should be properly configured or the application should fail fast if no valid URI is provided.
| const MONGO_URI = process.env.MONGO_URI || "your-default-mongodb-uri-here"; | |
| const MONGO_URI = process.env.MONGO_URI; | |
| if (!MONGO_URI) { | |
| console.error("MONGO_URI environment variable is required"); | |
| process.exit(1); | |
| } |
| const pythonProcess = spawn("python3", [ | ||
| "check.py", // Updated path (ensure correct relative path) |
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The Python script path "check.py" uses a relative path which could fail if the working directory changes. Use an absolute path or path.join() to ensure the script is found reliably.
| const pythonProcess = spawn("python3", [ | |
| "check.py", // Updated path (ensure correct relative path) | |
| const pythonProcess = spawn("python3", [ | |
| path.join(__dirname, "check.py"), // Use absolute path |
| const { spawn } = require("child_process"); | ||
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Add missing path module import needed for secure file path handling in the Python script execution.
| const { spawn } = require("child_process"); | |
| const { spawn } = require("child_process"); | |
| const path = require("path"); |
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Code Review
This pull request adds a new Javascript file that sets up an Express server with an endpoint to run a Python script. My review focuses on a critical security vulnerability. The code is vulnerable to OS Command Injection (CWE-78) because it passes unsanitized user input from a URL parameter directly to a child_process.spawn call. I've provided a detailed comment and a code suggestion to sanitize the input and mitigate this risk. Addressing this is crucial for server security.
| // Run the Python script with arguments | ||
| const pythonProcess = spawn("python3", [ | ||
| "check.py", // Updated path (ensure correct relative path) | ||
| ageInt.toString(), | ||
| "Vega", | ||
| "False", | ||
| description, | ||
| "fish", | ||
| ]); |
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The description variable, which is derived from user-controlled URL parameters, is passed directly to child_process.spawn(). This poses a critical security risk of OS Command Injection (CWE-78). While spawn() with an array of arguments is generally safer than exec() because it doesn't invoke a shell by default, the Python script check.py that is being executed could potentially use this argument in an unsafe manner (e.g., by concatenating it into a shell command), leading to arbitrary command execution on the server.
To mitigate this vulnerability, you must sanitize the description input before passing it to the spawn function. A robust approach is to use an allow-list for characters, permitting only those that are expected and known to be safe.
| // Run the Python script with arguments | |
| const pythonProcess = spawn("python3", [ | |
| "check.py", // Updated path (ensure correct relative path) | |
| ageInt.toString(), | |
| "Vega", | |
| "False", | |
| description, | |
| "fish", | |
| ]); | |
| // Sanitize the description to prevent potential command injection in the Python script. | |
| // This example allows only alphanumeric characters and spaces. Adjust as needed for your use case. | |
| const sanitizedDescription = description.replace(/[^a-zA-Z0-9 ]/g, ""); | |
| // Run the Python script with arguments | |
| const pythonProcess = spawn("python3", [ | |
| "check.py", // Updated path (ensure correct relative path) | |
| ageInt.toString(), | |
| "Vega", | |
| "False", | |
| sanitizedDescription, | |
| "fish", | |
| ]); |
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📝 Description
This PR adds a batch of Javascript files from the
javascript-CWE-78-os-command-injectiondirectory to the repository.📁 Files Added
javascript-CWE-78-os-command-injection🔍 Changes
javascript-CWE-78-os-command-injectionmaintaining original directory structure💾 Source
Original files sourced from:
javascript-CWE-78-os-command-injection