Sielco Analog FM Transmitter 2.12 Remote Privilege Escalation

Title: Sielco Analog FM Transmitter 2.12 Remote Privilege Escalation
Advisory ID: ZSL-2023-5755
Type: Local/Remote
Impact: Privilege Escalation
Risk: (4/5)
Release Date: 28.03.2023

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.

Description

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.

Vendor

Sielco S.r.l - https://www.sielco.org

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)

Tested On

lwIP/2.1.1
Web/3.0.3

Vendor Status

[26.01.2023] Vulnerability discovered.
[27.01.2023] Contact with the vendor and CSIRT Italia.
[27.03.2023] No response from the vendor.
[27.03.2023] No response from the CSIRT team.
[28.03.2023] Public security advisory released.

PoC

sielco_fm_eop.html

Credits

Vulnerability discovered by Gjoko Krstic - <[email protected]>

References

N/A

Changelog

[28.03.2023] - Initial release

Contact

Zero Science Lab

Web: https://www.zeroscience.mk
e-mail: [email protected]