[Snyk] Security upgrade tornado from 6.1 to 6.5.8

[anaconda-security-bot]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• requirements.txt

⚠️ Warning

ikola 8.1.3 requires Pillow, which is not installed.
livereload 2.6.3 requires tornado, which is not installed.
Flask 2.2.5 requires Werkzeug, which is not installed.

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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• Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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[anaconda-security-bot]

This upgrade spans multiple minor versions and introduces several changes that require verification, primarily related to Python version support and security hardening.

Key Changes:

• Python Version Support: The minimum required Python version has been increased multiple times. Version 6.2 requires Python 3.7+, version 6.3 requires Python 3.8+, and version 6.5 requires Python 3.9+. [1, 3, 4]
• Stricter Validation and Security:
  • SSL Verification: As of v6.2, SSL certificate verification is enabled by default in more client-side contexts. Connections to endpoints with invalid certificates may fail. [3]
  • HTTP Header Parsing: Versions 6.4 and 6.5 introduce stricter parsing of HTTP headers to prevent request smuggling and other vulnerabilities. This may affect integrations with non-compliant clients. [5, 8]
  • Redirect Behavior: As of v6.5.6, SimpleAsyncHTTPClient now strips Authorization and Cookie headers when following a redirect to a different origin. [7]
  • Default Limits: To prevent DoS attacks, v6.5.8 introduces a default limit of 1000 arguments for form-encoded POST bodies. This is configurable if needed. [6]

Recommendation:
Verify that your environment meets the new Python version requirements (3.9+ for the latest version). Review application logs for new warnings or errors after the upgrade, paying close attention to SSL/TLS connections, HTTP header handling, and form submissions that may exceed the new default limits.

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