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

Critical
Advisory ID
ZSL-2024-5820
Release Date
17 April 2024
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
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.

Proof of Concept
Disclosure Timeline
18.08.2023Vulnerability discovered.
20.08.2023Vendor contacted.
29.09.2023No response from the vendor.
09.12.2023Vendor contacted.
02.02.2024No response from the vendor.
16.03.2024Vendor contacted.
16.04.2024No response from the vendor.
17.04.2024Public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
17.04.2024Initial release
22.05.2024Added reference [1]
18.09.2024Added reference [2]
04.02.2025Added reference [3] and [4]