Class: Brakeman::CheckRenderDoS

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

Constant Summary

Constants inherited from BaseCheck

BaseCheck::CONFIDENCE

Constants included from Util

Util::ALL_COOKIES, Util::ALL_PARAMETERS, Util::COOKIES, Util::COOKIES_SEXP, Util::PARAMETERS, Util::PARAMS_SEXP, Util::PATH_PARAMETERS, Util::QUERY_PARAMETERS, Util::REQUEST_COOKIES, 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_dstr, #process_if, #process_params

Methods included from Util

#array?, #block?, #call?, #camelize, #class_name, #constant?, #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, #rails_version, #regexp?, #relative_path, #request_env?, #request_value?, #result?, #set_env_defaults, #sexp?, #string?, #string_interp?, #symbol?, #table_to_csv, #template_path_to_name, #true?, #truncate_table, #underscore

Methods included from ProcessorHelper

#current_file_name, #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

#run_check ⇒ Object 



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

def run_check
  if version_between? "3.0.0", "3.0.20" or
     version_between? "3.1.0", "3.1.12" or
     version_between? "3.2.0", "3.2.16"

    tracker.find_call(:target => nil, :method => :render).each do |result|
      if text_render? result
        warn_about_text_render
        break
      end
    end
  end
end

#text_render?(result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/brakeman/checks/check_render_dos.rb', line 22

def text_render? result
  node_type? result[:call], :render and
  result[:call].render_type == :text
end

#warn_about_text_render ⇒ Object 



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# File 'lib/brakeman/checks/check_render_dos.rb', line 27

def warn_about_text_render
  message = "Rails #{rails_version} has a denial of service vulnerability (CVE-2014-0082). Upgrade to Rails version 3.2.17"

  warn :warning_type => "Denial of Service",
    :warning_code => :CVE_2014_0082,
    :message => message,
    :confidence => :high,
    :link_path => "https://groups.google.com/d/msg/rubyonrails-security/LMxO_3_eCuc/ozGBEhKaJbIJ",
    :gem_info => gemfile_or_environment
end