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extensions_web_request_api.md

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Extensions WebRequest API

This page analyzes the security of the webRequest API for extensions.

Component Focus

extensions/browser/api/web_request/web_request_api.cc and related files.

Potential Logic Flaws

  • The file manages the webRequest API, which is a powerful API that can be used to intercept and modify network requests.
  • The file handles event listeners, which could be vulnerable to event-related issues.
  • The file creates proxies for network requests, which could be vulnerable to proxy-related issues.
  • The file interacts with the extension system, which could be vulnerable to extension-related issues.

Further Analysis and Potential Issues

  • The WebRequestAPI class manages the webRequest API. This class should be carefully analyzed for potential vulnerabilities, such as improper initialization or resource leaks.
  • The ProxySet class manages proxies for network requests. This class should be carefully analyzed for potential vulnerabilities, such as proxy bypasses or improper proxy handling.
  • The RequestIDGenerator class generates unique IDs for web requests. This class should be carefully analyzed for potential vulnerabilities, such as ID collisions or predictable IDs.
  • The WebRequestInternalAddEventListenerFunction class handles adding event listeners for the webRequest API. This class should be carefully analyzed for potential vulnerabilities, such as improper permission checks or event injection.
  • The WebRequestInternalEventHandledFunction class handles events dispatched by the webRequest API. This class should be carefully analyzed for potential vulnerabilities, such as improper data validation or event spoofing.
  • The ClearCacheQuotaHeuristic class limits the number of times an extension can clear the cache. This class should be carefully analyzed for potential vulnerabilities, such as quota bypasses or race conditions.
  • The file uses base::LazyInstance to create a singleton instance of the BrowserContextKeyedAPIFactory. This should be analyzed for potential threading issues.

Areas Requiring Further Investigation

  • How are the webRequest API events routed and dispatched?
  • What are the security implications of a malicious extension using the webRequest API?
  • How does the webRequest API handle errors?
  • How does the webRequest API interact with the network service?
  • What are the security implications of the webRequest API's access to network requests?

Secure Contexts and Extensions WebRequest API

  • How do secure contexts interact with the webRequest API?
  • Are there any vulnerabilities related to secure contexts and the webRequest API?

Privacy Implications

  • What are the privacy implications of the webRequest API?
  • Could a malicious extension use the webRequest API to track users?

Additional Notes

  • This component is part of the extensions module.
  • This component interacts with the network service and the extension system.