Internet Bug Bounty: rubygems.org Batching attack to `confirmation_token` by bypass rate limit

The following is copied from hackerone's report. https://hackerone.com/reports/1529183 --- I confirmed that EmailConfirmationsController has the same problem as https://hackerone.com/reports/449356...

RubyGems: 65534 times efficient, Brute-force attack for api_key

I have found that type checking for apikey is insufficient in rubygems.org's source code. https://github.com/rubygems/rubygems.org/blob/master/app/controllers/applicationcontroller.rbL63 ruby def authenticatewithapikey apikey = request.headers"Authorization" || params:apikey @apiuser =...