Class: Brakeman::CheckRenderRCE

Inherits:
CheckRender
  • Object
show all
Defined in:
lib/brakeman/checks/check_render_rce.rb

Instance Method Summary collapse

Instance Method Details

#check_for_rce(result) ⇒ Object 



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# File 'lib/brakeman/checks/check_render_rce.rb', line 23

def check_for_rce result
  return unless version_between? "0.0.0", "3.2.22" or
                version_between? "4.0.0", "4.1.14" or
                version_between? "4.2.0", "4.2.5"

  view = result[:call][2]
  if sexp? view and not duplicate? result
    if params? view and not safe_param? view
      add_result result

      warn :result => result,
        :warning_type => "Remote Code Execution",
        :warning_code => :dynamic_render_path_rce,
        :message => msg("Passing query parameters to ", msg_code("render"), " is vulnerable in ", msg_version(rails_version), " ", msg_cve("CVE-2016-0752")),
        :user_input => view,
        :confidence => :high,
        :cwe_id => [22]
    end
  end
end

#process_render_result(result) ⇒ Object 



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# File 'lib/brakeman/checks/check_render_rce.rb', line 14

def process_render_result result
  return unless node_type? result[:call], :render

  case result[:call].render_type
  when :partial, :template, :action, :file
    check_for_rce(result)
  end
end

#run_check ⇒ Object 



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

def run_check
  tracker.find_call(:target => nil, :method => :render).each do |result|
    process_render_result result
  end
end