Class: Brakeman::CheckPathname

Inherits:
BaseCheck
  • Object
show all
Defined in:
lib/brakeman/checks/check_pathname.rb

Instance Method Summary collapse

Instance Method Details

#check_pathname_join ⇒ Object 



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# File 'lib/brakeman/checks/check_pathname.rb', line 20

def check_pathname_join
  pathname_methods = [
    :'Pathname.new',
    :'Pathname.getwd',
    :'Pathname.glob',
    :'Pathname.pwd',
  ]

  tracker.find_call(targets: pathname_methods, method: :join, nested: true).each do |result|
    check_result result
  end
end

#check_rails_root_join ⇒ Object 



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# File 'lib/brakeman/checks/check_pathname.rb', line 14

def check_rails_root_join
  tracker.find_call(target: :'Rails.root', method: :join, nested: true).each do |result|
    check_result result
  end
end

#check_result(result) ⇒ Object 



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# File 'lib/brakeman/checks/check_pathname.rb', line 33

def check_result result
  return unless original? result

  result[:call].each_arg do |arg|
    if match = has_immediate_user_input?(arg)
      warn :result => result,
        :warning_type => "Path Traversal",
        :warning_code => :pathname_traversal,
        :message => "Absolute paths in `Pathname#join` cause the entire path to be relative to the absolute path, ignoring any prior values",
        :user_input => match,
        :confidence => :high,
        :cwe_id => [22]
    end
  end
end

#run_check ⇒ Object 



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# File 'lib/brakeman/checks/check_pathname.rb', line 8

def run_check
  check_rails_root_join
  check_pathname_join

end