Class: Brakeman::CheckForgerySetting

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

Overview

Checks that protect_from_forgery is set in the ApplicationController.

Also warns for CSRF weakness in certain versions of Rails: groups.google.com/group/rubyonrails-security/browse_thread/thread/2d95a3cc23e03665

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

#run_checkObject


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# File 'lib/brakeman/checks/check_forgery_setting.rb', line 12

def run_check
  app_controller = tracker.controllers[:ApplicationController]

  return unless ancestor? app_controller, :"ActionController::Base"

  if tracker.config[:rails][:action_controller] and
    tracker.config[:rails][:action_controller][:allow_forgery_protection] == Sexp.new(:false)

    warn :controller => :ApplicationController,
      :warning_type => "Cross-Site Request Forgery",
      :warning_code => :csrf_protection_disabled,
      :message => "Forgery protection is disabled",
      :confidence => CONFIDENCE[:high],
      :file => app_controller[:files].first

  elsif app_controller and not app_controller[:options][:protect_from_forgery]

    warn :controller => :ApplicationController,
      :warning_type => "Cross-Site Request Forgery",
      :warning_code => :csrf_protection_missing,
      :message => "'protect_from_forgery' should be called in ApplicationController",
      :confidence => CONFIDENCE[:high],
      :file => app_controller[:files].first

  elsif version_between? "2.1.0", "2.3.10"

    warn :controller => :ApplicationController,
      :warning_type => "Cross-Site Request Forgery",
      :warning_code => :CVE_2011_0447,
      :message => "CSRF protection is flawed in unpatched versions of Rails #{tracker.config[:rails_version]} (CVE-2011-0447). Upgrade to 2.3.11 or apply patches as needed",
      :confidence => CONFIDENCE[:high],
      :gem_info => gemfile_or_environment,
      :link_path => "https://groups.google.com/d/topic/rubyonrails-security/LZWjzCPgNmU/discussion"

  elsif version_between? "3.0.0", "3.0.3"

    warn :controller => :ApplicationController,
      :warning_type => "Cross-Site Request Forgery",
      :warning_code => :CVE_2011_0447,
      :message => "CSRF protection is flawed in unpatched versions of Rails #{tracker.config[:rails_version]} (CVE-2011-0447). Upgrade to 3.0.4 or apply patches as needed",
      :confidence => CONFIDENCE[:high],
      :gem_info => gemfile_or_environment,
      :link_path => "https://groups.google.com/d/topic/rubyonrails-security/LZWjzCPgNmU/discussion"
  end
end