Title: Sielco PolyEco Digital FM Transmitter 2.0.6 Radio Data System POST Manipulation
Advisory ID: ZSL-2023-5767
Impact: Security Bypass, Cross-Site Scripting
Release Date: 10.04.2023
PolyEco is the innovative family of high-end digitalFM transmitters of Sielco. They are especially suited as highperformance power system exciters or compact low-mid powertransmitters. The same cabinet may in fact be fitted with 50,100, 300, 500, 1000W power stage (PolyEco50, 100, 300, 500,1000).
All features can be controlled via the large touch-screen display4.3\” or remotely. Many advanced features are inside by defaultin the basic version such as: stereo and RDS encoder, audiochange-over, remote-control via LAN and SNMP, \”FFT\” spectralanalysis of the audio sources, SFN synchronization and much more.
Improper access control occurs when the application providesdirect access to objects based on user-supplied input. As a resultof this vulnerability attackers can bypass authorization and accessresources behind protected pages. The application interface allowsusers to perform certain actions via HTTP requests without performingany validity checks to verify the requests. This can be exploitedto perform certain actions and manipulate the RDS text display.
Sielco S.r.l – https://www.sielco.org
PolyEco1000 CPU:2.0.6 FPGA:10.19
PolyEco1000 CPU:1.9.4 FPGA:10.19
PolyEco1000 CPU:1.9.3 FPGA:10.19
PolyEco500 CPU:1.7.0 FPGA:10.16
PolyEco300 CPU:2.0.2 FPGA:10.19
PolyEco300 CPU:2.0.0 FPGA:10.19
[26.01.2023] Vulnerability discovered.
[27.01.2023] Contact with the vendor and CSIRT Italia.
[09.04.2023] No response from the vendor.
[09.04.2023] No response from the CSIRT team.
[10.04.2023] Public security advisory released.
Vulnerability discovered by Gjoko Krstic – <firstname.lastname@example.org>
[10.04.2023] – Initial release
Zero Science Lab