Class: Brakeman::CheckNumberToCurrency

Inherits:
BaseCheck show all
Defined in:
lib/brakeman/checks/check_number_to_currency.rb

Constant Summary

Constants inherited from BaseCheck

BaseCheck::CONFIDENCE

Constants included from Util

Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_ENV, Util::REQUEST_PARAMETERS, Util::REQUEST_PARAMS, Util::SESSION, Util::SESSION_SEXP

Constants inherited from SexpProcessor

SexpProcessor::VERSION

Instance Attribute Summary

Attributes inherited from BaseCheck

#tracker, #warnings

Attributes inherited from SexpProcessor

#context, #env, #expected

Instance Method Summary collapse

Methods inherited from BaseCheck

#add_result, inherited, #initialize, #process_call, #process_cookies, #process_default, #process_if, #process_params, #process_string_interp

Methods included from Util

#array?, #block?, #call?, #camelize, #contains_class?, #context_for, #cookies?, #false?, #file_by_name, #file_for, #hash?, #hash_access, #hash_insert, #hash_iterate, #integer?, #make_call, #node_type?, #number?, #params?, #pluralize, #regexp?, #relative_path, #request_env?, #request_value?, #result?, #set_env_defaults, #sexp?, #string?, #symbol?, #table_to_csv, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#class_name, #process_all, #process_all!, #process_call_args, #process_module

Methods inherited from SexpProcessor

#error_handler, #in_context, #initialize, #process, #process_dummy, #scope

Constructor Details

This class inherits a constructor from Brakeman::BaseCheck

Instance Method Details

#check_number_to_currency_usage ⇒ Object 



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# File 'lib/brakeman/checks/check_number_to_currency.rb', line 35

def check_number_to_currency_usage
  tracker.find_call(:target => false, :method => :number_to_currency).each do |result|
    arg = result[:call].second_arg
    next unless arg

    if match = (has_immediate_user_input? arg or has_immediate_model? arg)
      match = match.match if match.is_a? Match
      @found_any = true
      warn_on_number_to_currency result, match
    end
  end
end

#generic_warning ⇒ Object 



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# File 'lib/brakeman/checks/check_number_to_currency.rb', line 18

def generic_warning
  message = "Rails #{tracker.config[:rails_version]} has a vulnerability in number_to_currency (CVE-2013-6415). Upgrade to Rails version "

  if version_between? "2.3.0", "3.2.15"
    message << "3.2.16"
  else
    message << "4.0.2"
  end

  warn :warning_type => "Cross Site Scripting",
    :warning_code => :CVE_2013_6415,
    :message => message,
    :confidence => CONFIDENCE[:med],
    :file => gemfile_or_environment,
    :link_path => "https://groups.google.com/d/msg/ruby-security-ann/9WiRn2nhfq0/2K2KRB4LwCMJ"
end

#run_check ⇒ Object 



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

def run_check
  return if lts_version? '2.3.18.6'

  if (version_between? "2.0.0", "3.2.15" or version_between? "4.0.0", "4.0.1")
    check_number_to_currency_usage

    generic_warning unless @found_any
  end
end

#warn_on_number_to_currency(result, match) ⇒ Object 



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# File 'lib/brakeman/checks/check_number_to_currency.rb', line 48

def warn_on_number_to_currency result, match
  warn :result => result,
    :warning_type => "Cross Site Scripting",
    :warning_code => :CVE_2013_6415_call,
    :message => "Currency value in number_to_currency is not safe in Rails #{@tracker.config[:rails_version]}",
    :confidence => CONFIDENCE[:high],
    :link_path => "https://groups.google.com/d/msg/ruby-security-ann/9WiRn2nhfq0/2K2KRB4LwCMJ",
    :user_input => match
end