Directory traversal vulnerability in actionpack/lib/action_dispatch/middleware/static.rb in Action Pack in Ruby on Rails 3.x before 3.2.20, 4.0.x before 4.0.11, 4.1.x before 4.1.7, and 4.2.x before 4.2.0.beta3, when serve_static_assets is enabled, allows remote attackers to determine the existence of files outside the application root via a /..%2F sequence.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| actionpack(RubyGems) | 3.0.0 | 3.2.20 | N/A |
| actionpack(RubyGems) | 4.0.0 | 4.0.11 | N/A |
| actionpack(RubyGems) | 4.1.0 | 4.1.7 | N/A |
| actionpack(RubyGems) | 4.2.0.beta1 | 4.2.0.beta3 | N/A |
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