Ruby on Rails 7PK - Security Features Vulnerability - CVE-2015-7576
The http_basic_authenticate_with method in actionpack/lib/action_controller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1 4.0.x and 4.1.x before 4.1.14.1 4.2.x before 4.2.5.1 and 5.x before 5.0.0.beta1.1 does not use a constant-time algorithm for verifying credentials which makes it easier for remote attackers to bypass authentication by measuring timing differences.