Class: Brakeman::CheckSelectVulnerability

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

Overview

Checks for select() helper vulnerability in some versions of Rails 3 groups.google.com/group/rubyonrails-security/browse_thread/thread/9da0c515a6c4664

Constant Summary

Constants inherited from BaseCheck

BaseCheck::CONFIDENCE

Constants included from Util

Util::ALL_COOKIES, Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::DIR_CONST, Util::LITERALS, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_COOKIES, Util::REQUEST_ENV, Util::REQUEST_PARAMETERS, Util::REQUEST_PARAMS, Util::REQUEST_REQUEST_PARAMETERS, Util::SAFE_LITERAL, Util::SESSION, Util::SESSION_SEXP, Util::SIMPLE_LITERALS

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_array, #process_call, #process_cookies, #process_default, #process_dstr, #process_if, #process_params

Methods included from Messages

#msg, #msg_code, #msg_cve, #msg_file, #msg_input, #msg_lit, #msg_plain, #msg_version

Methods included from Util

#all_literals?, #array?, #block?, #call?, #camelize, #class_name, #constant?, #contains_class?, #cookies?, #dir_glob?, #false?, #hash?, #hash_access, #hash_insert, #hash_iterate, #hash_values, #integer?, #kwsplat?, #literal?, #make_call, #node_type?, #number?, #params?, #pluralize, #rails_version, #recurse_check?, #regexp?, #remove_kwsplat, #request_headers?, #request_value?, #result?, #safe_literal, #safe_literal?, #safe_literal_target?, #set_env_defaults, #sexp?, #simple_literal?, #string?, #string_interp?, #symbol?, #template_path_to_name, #true?, #underscore

Methods included from ProcessorHelper

#current_file, #process_all, #process_all!, #process_call_args, #process_call_defn?, #process_class, #process_module

Methods inherited from SexpProcessor

#in_context, #initialize, #process, processors, #scope

Constructor Details

This class inherits a constructor from Brakeman::BaseCheck

Instance Method Details

#process_result(result) ⇒ Object 



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# File 'lib/brakeman/checks/check_select_vulnerability.rb', line 37

def process_result result
  return if duplicate? result

  third_arg = result[:call].third_arg

  #Check for user input in options parameter
  if sexp? third_arg and include_user_input? third_arg
    add_result result

    if string_interp? third_arg
      confidence = :medium
    else
      confidence = :weak
    end

    warn :template => result[:location][:template],
        :warning_type => "Cross-Site Scripting",
        :warning_code => :select_options_vuln,
        :result => result,
        :message => @message,
        :confidence => confidence,
        :cwe_id => [79]
  end
end

#run_check ⇒ Object 



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# File 'lib/brakeman/checks/check_select_vulnerability.rb', line 10

def run_check

  if lts_version? "2.3.18.7"
    return
  elsif version_between? "3.0.0", "3.0.11"
    suggested_version = "3.0.12"
  elsif version_between? "3.1.0", "3.1.3"
    suggested_version = "3.1.4"
  elsif version_between? "3.2.0", "3.2.1"
    suggested_version = "3.2.2"
  elsif version_between? "2.0.0", "2.3.14"
    suggested_version = "3 or use options_for_select"
  else
    return
  end

  @message = msg("Upgrade to ", msg_version(suggested_version), ". In ", msg_version(rails_version), " ", msg_code("select"), " helper is vulnerable")

  calls = tracker.find_call(:target => nil, :method => :select).select do |result|
    result[:location][:type] == :template
  end

  calls.each do |result|
    process_result result
  end
end