Vulnerable sample for Action test

[souro1212]

This PR intentionally adds risky patterns for testing ai-secure-code-review-action.

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📥 Commits

Reviewing files that changed from the base of the PR and between 5a73ae7 and 2514cb0.

📒 Files selected for processing (1)

• main.go (1 hunks)

✨ Finishing Touches

• 📝 Generate Docstrings

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• Commit unit tests in branch feat/vuln-demo

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[github-actions]

🔐 Secure Code Review (AI)

Risk Summary: High (3), Medium (1)

1. Finding: Path Traversal Vulnerability
   Why it matters: The code allows user-controlled input to dictate the file path, which can lead to unauthorized access to sensitive files on the server.
   Evidence (diff lines): b, _ := ioutil.ReadFile("./data/" + file)
   Fix (concrete): Validate and sanitize the file input to ensure it does not contain path traversal characters (e.g., ..). Consider using a whitelist of allowed filenames.

2. Finding: Insecure Hashing Algorithm
   Why it matters: MD5 is considered weak and vulnerable to collision attacks, making it unsuitable for cryptographic purposes.
   Evidence (diff lines): fmt.Fprintf(w, "%x", md5.Sum(b))
   Fix (concrete): Replace MD5 with a stronger hashing algorithm such as SHA-256 from the crypto/sha256 package.

3. Finding: Error Handling
   Why it matters: Ignoring errors can lead to silent failures and make debugging difficult. Additionally, it may expose sensitive information if errors are not handled properly.
   Evidence (diff lines): b, _ := ioutil.ReadFile(...)
   Fix (concrete): Handle the error returned by ioutil.ReadFile and respond with an appropriate HTTP error status if the file cannot be read.

Safeguards Checklist:

• Input validation: Fail
• Output encoding: Pass
• Error handling: Fail
• Use of secure algorithms: Fail
• Path traversal protection: Fail

The diff is small and focused, but it introduces critical security risks that need immediate attention.

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Models can make mistakes. Verify before merging.

[secure-code-warrior-for-github]

Micro-Learning Topic: Weak algorithm (Detected by phrase)

Matched on "Insecure Hash"

What is this? (2min video)

As computing power and availability increases, cryptographic algorithms are periodically updated to ensure that these increases do not allow brute force attacks to succeed. Furthermore, ongoing cryptography research will often identify flaws in existing algorithms that weaken their security. Use of weak or outdated algorithms to protect sensitive data places it at risk because encryption weaknesses, hashing or signature algorithms can result in the protection being undone.

Try a challenge in Secure Code Warrior

Helpful references

• OWASP Using a broken or risky cryptographic algorithm article - OWASP community page with comprehensive information about using broken or risky cryptographic algorithms, and links to various OWASP resources to help detect or prevent it.
• OWASP Password Storage Cheat Sheet - This cheat sheet provides guidance on the recommended algorithms related to storing passwords.
• OWASP Transport Layer Protection Cheat Sheet - This cheat sheet provides guidance on how to implement transport layer protection for an application using Transport Layer Security (TLS), including recommendations on cipher and key exchange algorithms.
• OWASP Cryptographic Storage Cheat Sheet - This article provides a simple model to follow when implementing solutions to protect data at rest, including recommended cryptographic algorithms.

Micro-Learning Topic: Path traversal (Detected by phrase)

Matched on "Path Traversal"

What is this? (2min video)

Path traversal vulnerabilities occur when inputs that have not been sufficiently validated or sanitised are used to build directory or file paths. If an attacker can influence the path being accessed by the server, they may be able to gain unauthorised access to files or even execute arbitrary code on the server (when coupled with file upload functionality).

Try a challenge in Secure Code Warrior

Helpful references

• OWASP Input Validation Cheat Sheet - This cheatsheet is focused on providing clear, simple, actionable guidance for preventing injection and input validation flaws in your applications, including defence against path traversal.
• OWASP Path Traversal - OWASP community page with comprehensive information about path traversal, and links to various OWASP resources to help detect or prevent it.