Class: Brakeman::CheckSimpleFormat

Inherits:
CheckCrossSiteScripting show all
Defined in:
lib/brakeman/checks/check_simple_format.rb

Constant Summary

Constants inherited from CheckCrossSiteScripting

Brakeman::CheckCrossSiteScripting::CGI, Brakeman::CheckCrossSiteScripting::FORM_BUILDER, Brakeman::CheckCrossSiteScripting::HAML_HELPERS, Brakeman::CheckCrossSiteScripting::IGNORE_LIKE, Brakeman::CheckCrossSiteScripting::IGNORE_MODEL_METHODS, Brakeman::CheckCrossSiteScripting::MODEL_METHODS, Brakeman::CheckCrossSiteScripting::URI, Brakeman::CheckCrossSiteScripting::XML_HELPER

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 CheckCrossSiteScripting

#actually_process_call, #boolean_method?, #cgi_escaped?, #check_for_immediate_xss, #form_builder_method?, #haml_escaped?, #ignore_call?, #ignored_method?, #ignored_model_method?, #likely_model_attribute?, #process_cookies, #process_escaped_output, #process_format, #process_format_escaped, #process_if, #process_output, #process_params, #process_render, #process_string_interp, #raw_call?, #safe_input_attribute?, #setup, #xml_escaped?

Methods inherited from BaseCheck

#add_result, inherited, #initialize, #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

#check_simple_format_usageObject


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# File 'lib/brakeman/checks/check_simple_format.rb', line 29

def check_simple_format_usage
  tracker.find_call(:target => false, :method => :simple_format).each do |result|
    @matched = false
    process_call result[:call]
    if @matched
      warn_on_simple_format result, @matched
    end
  end
end

#generic_warningObject


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

def generic_warning
  message = "Rails #{tracker.config[:rails_version]} has a vulnerability in simple_format (CVE-2013-6416). Upgrade to Rails version 4.0.2"

  warn :warning_type => "Cross Site Scripting",
    :warning_code => :CVE_2013_6416,
    :message => message,
    :confidence => CONFIDENCE[:med],
    :gem_info => gemfile_or_environment,
    :link_path => "https://groups.google.com/d/msg/ruby-security-ann/5ZI1-H5OoIM/ZNq4FoR2GnIJ"
end

#process_call(exp) ⇒ Object


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# File 'lib/brakeman/checks/check_simple_format.rb', line 39

def process_call exp
  @mark = true
  actually_process_call exp
  exp
end

#run_checkObject


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

def run_check
  if version_between? "4.0.0", "4.0.1"
    @inspect_arguments = true
    @ignore_methods = Set[:h, :escapeHTML]

    check_simple_format_usage
    generic_warning unless @found_any
  end
end

#warn_on_simple_format(result, match) ⇒ Object


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# File 'lib/brakeman/checks/check_simple_format.rb', line 45

def warn_on_simple_format result, match
  return if duplicate? result
  add_result result

  @found_any = true

  warn :result => result,
    :warning_type => "Cross Site Scripting",
    :warning_code => :CVE_2013_6416_call,
    :message => "Values passed to simple_format are not safe in Rails #{@tracker.config[:rails_version]}",
    :confidence => CONFIDENCE[:high],
    :gem_info => gemfile_or_environment,
    :link_path => "https://groups.google.com/d/msg/ruby-security-ann/5ZI1-H5OoIM/ZNq4FoR2GnIJ",
    :user_input => match.match
end