Class: Brakeman::CheckMailTo

Inherits:
BaseCheck
  • Object
show all
Defined in:
lib/brakeman/checks/check_mail_to.rb

Overview

Check for cross-site scripting vulnerability in mail_to :encode => :javascript with certain versions of Rails (< 2.3.11 or < 3.0.4).

http://groups.google.com/group/rubyonrails-security/browse_thread/thread/f02a48ede8315f81

Instance Method Summary collapse

Instance Method Details

#mail_to_javascript? ⇒ Boolean

Check for javascript encoding of mail_to address mail_to email, name, :encode => :javascript

Returns:



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# File 'lib/brakeman/checks/check_mail_to.rb', line 35

def mail_to_javascript?
  Brakeman.debug "Checking calls to mail_to for javascript encoding"

  tracker.find_call(:target => false, :method => :mail_to).each do |result|
    result[:call].each_arg do |arg|
      if hash? arg
        if option = hash_access(arg, :encode)
          return result if symbol? option and option.value == :javascript
        end
      end
    end
  end

  false
end

#run_check ⇒ Object 



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

def run_check
  if (version_between? "2.3.0", "2.3.10" or version_between? "3.0.0", "3.0.3") and result = mail_to_javascript?
    message = msg("Vulnerability in ", msg_code("mail_to"), " using javascript encoding ", msg_cve("CVE-2011-0446"), ". Upgrade to ")

    if version_between? "2.3.0", "2.3.10"
      message << msg_version("2.3.11")
    else
      message << msg_version("3.0.4")
    end

    warn :result => result,
      :warning_type => "Mail Link",
      :warning_code => :CVE_2011_0446,
      :message => message,
      :confidence => :high,
      :gem_info => gemfile_or_environment, # Probably ignored now
      :link_path => "https://groups.google.com/d/topic/rubyonrails-security/8CpI7egxX4E/discussion",
      :cwe_id => [79]
  end
end