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attack-surface.md

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Attack Surface Analysis for scalessec/toast-swift

Attack Surface: Denial of Service (DoS) via Excessive Toast Creation

  • Description: An attacker floods the application with toast notifications, leading to UI unresponsiveness or crashes.
  • How toast-swift contributes: toast-swift is the direct mechanism for displaying the toasts. The application's logic controls the triggering of these toasts, making it the root cause, but toast-swift is the enabler.
  • Example: An attacker repeatedly submits a malformed form that triggers an error toast for each submission, overwhelming the UI. toast-swift is used to display each of these error toasts.
  • Impact: Application becomes unusable; potential for complete denial of service.
  • Risk Severity: High
  • Mitigation Strategies:
    • Rate Limiting (Server-Side): Implement server-side rate limiting on actions that can trigger toasts.
    • Rate Limiting (Client-Side): Implement client-side rate limiting on toast creation, even if the trigger originates from the server.
    • Toast Queueing: Use a queue with a maximum size for toast notifications. Discard older toasts if the queue is full.
    • Circuit Breaker: Temporarily disable toast notifications if an excessive number are detected.

Attack Surface: Information Disclosure via Toast Content

  • Description: Sensitive information is inadvertently displayed in toast messages, exposing it to unauthorized users.
  • How toast-swift contributes: toast-swift is the direct mechanism that displays the sensitive content. The application's logic is responsible for providing this content, but toast-swift is the component that makes it visible.
  • Example: An error handler displays a raw database error message (containing table names) in a toast. toast-swift is used to render this sensitive information to the user.
  • Impact: Exposure of sensitive data (database structure, API keys, user details, internal system information).
  • Risk Severity: High (potentially Critical, depending on the information)
  • Mitigation Strategies:
    • Generic Error Messages: Display only user-friendly, generic error messages in toasts. Never show raw error details.
    • Centralized Error Handling: Use a centralized error handling system to ensure consistent and secure error message generation.
    • Code Review: Thoroughly review all code paths that generate toast messages.
    • Logging: Log detailed error information server-side, not in client-side toasts.

Attack Surface: Cross-Site Scripting (XSS) - Highly Unlikely, but Direct

  • Description: Untrusted user input is directly inserted into the toast content without sanitization, allowing for the execution of malicious JavaScript.
  • How toast-swift contributes: toast-swift is the direct mechanism that renders the potentially malicious HTML/JavaScript content within the toast. While the application is responsible for the lack of sanitization, toast-swift is the component that executes the unsanitized input.
  • Example: A user enters <script>alert('XSS')</script> into a form, and this is directly displayed in a toast without escaping. toast-swift renders this script, causing the alert to appear.
  • Impact: Execution of arbitrary JavaScript, potentially leading to session hijacking, data theft, or website defacement.
  • Risk Severity: Critical (if present, but highly unlikely with proper input handling)
  • Mitigation Strategies:
    • Input Sanitization: Always sanitize and encode any user-supplied data before displaying it in a toast (or anywhere). Use HTML escaping.
    • Content Security Policy (CSP): Implement a CSP to restrict script sources.