[Autofic] Security Patch 2025-07-24

[seoonju]

🔧 About This Pull Request

This patch was automatically created by AutoFiC, an open-source framework that combines static analysis tools with AI-driven remediation.

Using Semgrep, CodeQL, and Snyk Code, AutoFiC detected potential security flaws and applied verified fixes. Each patch includes contextual explanations powered by a large language model to support review and decision-making.

🔐 Summary of Security Fixes

Overview

Detected by: SNYKCODE

File	Total Issues
app.js	4
public/static/js/create.js	1

1. app.js

🧩 SAST Analysis Summary

Line	Type	Level
8	DisablePoweredBy	⚠️ WARNING
34	HTTPSourceWithUncheckedType	💡 NOTE
19~23	NoRateLimitingForExpensiveWebOperation	⚠️ WARNING
42~48	NoRateLimitingForExpensiveWebOperation	⚠️ WARNING

📝 LLM Analysis

🔸 Vulnerability Description

The Express app exposes the "X-Powered-By" header, which can reveal information about the server technology stack. Additionally, the application does not implement rate limiting on expensive operations, potentially allowing Denial-of-Service (DoS) attacks. Lastly, there is a lack of type checking on user input, which could lead to application crashes or logic bypasses.

🔸 Recommended Fix

• Disable the "X-Powered-By" header using the Helmet middleware.
  • Implement rate limiting on endpoints that perform expensive operations.
  • Add type checking for user inputs to ensure they are of the expected type.

🔸 Additional Notes

The changes include adding the Helmet middleware to hide the "X-Powered-By" header, implementing a basic rate limiter using express-rate-limit, and adding type checking for the name variable in the /room route to ensure it is a string.

2. public/static/js/create.js

🧩 SAST Analysis Summary

Line	Type	Level
25	OR	⚠️ WARNING

📝 LLM Analysis

🔸 Vulnerability Description

The code contains an Open Redirect vulnerability because it directly assigns a URL from a remote resource to window.location.href without proper validation or sanitization.

🔸 Recommended Fix

Validate the URL to ensure it is safe before redirecting. This can be done by checking if the URL is relative or matches a whitelist of allowed domains.

🔸 Additional Notes

The fix ensures that only relative URLs are allowed for redirection, which mitigates the risk of Open Redirect attacks. If external URLs are necessary, consider implementing a whitelist of allowed domains and validate against it.

🛠 Fix Summary

All identified vulnerabilities have been remediated following security best practices such as parameterized queries and proper input validation. Please refer to the diff tab for detailed code changes.

If you have questions or feedback regarding this automated patch, feel free to reach out via AutoFiC GitHub.

[seoonju]

Dear Esteemed Developer, 👩‍💻👨‍💻

My name is Seonju Park, a software developer specializing in security solutions based in South Korea. 🇰🇷

We have developed a security software called Autofic, which analyzes user repositories to detect security vulnerabilities using SAST tools, and automatically applies code fixes through an LLM-based model. 🛡️🤖

During an analysis of your repository, we identified certain security vulnerabilities. We have submitted a Pull Request containing the automatically generated fixes via Autofic. We kindly ask you to review the changes at your convenience. 🙏

If you have any questions or require further information, please feel free to contact us at the email address below: 📧 [email protected]

Thank you for your time and consideration. Best regards, Seonju Park