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 a75527b and 50e122d.

📒 Files selected for processing (1)

• app.rb (1 hunks)

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[github-actions]

🔐 Secure Code Review (AI)

Risk Summary: High (2), Medium (1)

1. Finding: Potential for XSS

   • Why it matters: The use of ERB.new with untrusted input (params[:name]) can lead to Cross-Site Scripting (XSS) if the input is not properly sanitized or escaped.
   • Evidence (diff lines):

     ERB.new("Hello #{name}").result

   • Fix (concrete): Use Rack::Utils.escape_html(name) to escape the user input before rendering it in the ERB template:

     ERB.new("Hello #{Rack::Utils.escape_html(name)}").result

2. Finding: Unsafe YAML deserialization

   • Why it matters: The use of YAML.load(data) can lead to arbitrary code execution if the input is manipulated to include malicious objects, as YAML deserialization can instantiate arbitrary classes.
   • Evidence (diff lines):

     YAML.load(data)

   • Fix (concrete): Use YAML.safe_load(data) instead, which limits the types of objects that can be deserialized:

     YAML.safe_load(data)

3. Finding: Lack of input validation

   • Why it matters: There is no validation on the params[:data] input, which could lead to unexpected behavior or security issues.
   • Evidence (diff lines):

     data = params[:data]

   • Fix (concrete): Implement input validation to ensure that data conforms to expected formats or constraints before processing it.

Safeguards Checklist:

• Input validation: Fail
• Output encoding: Fail
• Safe deserialization: Fail
• Use of secure libraries: Pass

The diff is not truncated, but it is limited in scope. Further review of the entire file may be necessary for a comprehensive security assessment.

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Models can make mistakes. Verify before merging.

[secure-code-warrior-for-github]

Micro-Learning Topic: Cross-site scripting (Detected by phrase)

Matched on "Cross-Site Scripting"

Cross-site scripting vulnerabilities occur when unescaped input is rendered into a page displayed to the user. When HTML or script is included in the input, it will be processed by a user's browser as HTML or script and can alter the appearance of the page or execute malicious scripts in their user context.

Try a challenge in Secure Code Warrior

Helpful references

• Prevent Cross-Site Scripting (XSS) in ASP.NET Core - A detailed Microsoft article on how to prevent cross-site scripting in ASP.NET Core.
• OWASP Cross Site Scripting (XSS) Software Attack - OWASP community page with comprehensive information about cross site scripting, and links to various OWASP resources to help detect or prevent it.
• OWASP Cross Site Scripting Prevention Cheat Sheet - This article provides a simple positive model for preventing XSS using output encoding properly.