Login CSRF in Basecamp Upright Static Credentials

Executive Summary

This vulnerability is a login cross-site request forgery (CSRF) issue in the static credentials callback of the basecamp/upright project at a specific commit. CSRF tricks users into submitting unauthorized commands via their authenticated session. The SessionsController lacks proper CSRF protection for the create action, allowing attackers to forge login requests.

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Detection Guidance

Check the sessions_controller.rb file in your Upright installation for the create action. Look for skip_forgery_protection being used, which disables CSRF protection. Verify if the SessionsController has skip_before_action :authenticate_user for new and create actions.

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Impact Analysis

An attacker could trick an authenticated user into unknowingly triggering a login request, potentially allowing unauthorized access to the system. This could lead to session hijacking, data manipulation, or further exploitation of the application's functionality.

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Compliance Impact

This vulnerability could lead to unauthorized access, violating data protection principles in GDPR and HIPAA. GDPR requires protecting personal data, while HIPAA mandates secure access controls. A CSRF flaw may result in non-compliance, potential fines, and loss of trust due to unauthorized data exposure.

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Mitigation Strategies

Remove skip_forgery_protection from the create action in sessions_controller.rb. Ensure CSRF protection is enabled for all authentication-related actions. Review and update authentication mechanisms to enforce proper session management.

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