Sielco Analog FM Transmitter 2.12 'id' Cookie Brute Force Session Hijacking  
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 Cookie session ID 'id' is of an insufficient length and  
can be exploited by brute force, which may allow a remote attacker  
to obtain a valid session, bypass authentication and manipulate  
the transmitter.  
Tested on: lwIP/2.1.1  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
Advisory ID: ZSL-2023-5758  
Advisory URL:  
# Session values (len=5)  
Cookie: id=44189  
Cookie: id=37692  
Cookie: id=+6638  
Cookie: id=+3077