Title: Sielco PolyEco Digital FM Transmitter 2.0.6 Authorization Bypass Factory Reset
Advisory ID: ZSL-2023-5768
Type: Local/Remote
Impact: Privilege Escalation, Security Bypass, DoS
Risk: (5/5)
Release Date: 10.04.2023
Summary
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.
Description
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.
Vendor
Sielco S.r.l – https://www.sielco.org
Affected Version
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
Tested On
lwIP/2.1.1 (http://savannah.nongnu.org/projects/lwip)
Vendor Status
[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.
PoC
sielco_polyeco_reset.txt
Credits
Vulnerability discovered by Gjoko Krstic – <gjoko@zeroscience.mk>
References
N/A
Changelog
[10.04.2023] – Initial release
Contact
Zero Science Lab
Web: https://www.zeroscience.mk
e-mail: lab@zeroscience.mk
Source: php.8675-3202-LSZ/seitilibarenluv/ne/km.ecneicsorez.www
