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X-Debug-Token Information Leak

  • Risk:

  • Low

  • Type:
  • Passive
Summary

The response contained an X-Debug-Token or X-Debug-Token-Link header. This indicates that Symfony’s Profiler may be in use and exposing sensitive data.

Solution

Limit access to Symfony's Profiler, either via authentication/authorization or limiting inclusion of the header to specific clients (by IP, etc.).

Other info
By accessing a URL in the form http://target_host/_profiler/token_value (i.e.: http://example.com/_profiler_/123ab4), you may gain access to the profiler and further leaked information.
References

https://symfony.com/doc/current/cookbook/profiler/profiling_data.html

https://symfony.com/blog/new-in-symfony-2-4-quicker-access-to-the-profiler-when-working-on-an-api

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