Class: Brakeman::CheckI18nXSS

Inherits:
BaseCheck show all
Defined in:
lib/brakeman/checks/check_i18n_xss.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, #github_url, #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, #template_path_to_name, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#class_name, #process_all, #process_all!, #process_call_args, #process_class, #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

#has_workaround?Boolean

Returns:

  • (Boolean)

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# File 'lib/brakeman/checks/check_i18n_xss.rb', line 43

def has_workaround?
  tracker.check_initializers(:I18n, :const_defined?).any? do |match|
    match.last.first_arg == s(:lit, :MissingTranslation)
  end
end

#run_checkObject


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# File 'lib/brakeman/checks/check_i18n_xss.rb', line 8

def run_check
  if (version_between? "3.0.6", "3.2.15" or version_between? "4.0.0", "4.0.1") and not has_workaround?
    message = "Rails #{tracker.config[:rails_version]} has an XSS vulnerability in i18n (CVE-2013-4491). Upgrade to Rails version "
    i18n_gem = tracker.config[:gems][:i18n][:version] if tracker.config[:gems][:i18n]

    if version_between? "3.0.6", "3.1.99" and version_before i18n_gem, "0.5.1"
      message << "3.2.16 or i18n 0.5.1"
    elsif version_between? "3.2.0", "4.0.1" and version_before i18n_gem, "0.6.6"
      message << "4.0.2 or i18n 0.6.6"
    else
      return
    end

    warn :warning_type => "Cross Site Scripting",
      :warning_code => :CVE_2013_4491,
      :message => message,
      :confidence => CONFIDENCE[:med],
      :gem_info => gemfile_or_environment(:i18n),
      :link_path => "https://groups.google.com/d/msg/ruby-security-ann/pLrh6DUw998/bLFEyIO4k_EJ"
  end
end

#version_before(gem_version, target) ⇒ Object


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# File 'lib/brakeman/checks/check_i18n_xss.rb', line 30

def version_before gem_version, target
  return true unless gem_version
  gem_version.split('.').map(&:to_i).zip(target.split('.').map(&:to_i)).each do |gv, t|
    if gv < t
      return true
    elsif gv > t
      return false
    end
  end

  false
end