Tosibox Key Service 3.3.0 Local Privilege Escalation / Unquoted Service Path

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Tosibox Key Service 3.3.0 Local Privilege Escalation  
  
  
Vendor: Tosibox Oy  
Product web page: https://www.tosibox.com  
Affected version: <=3.3.0  
  
Summary: TOSIBOX® SoftKey is a software that enables a secure connection  
between your computer and one or more TOSIBOX® Nodes, giving you full  
visibility and control over the network devices connected to the Node.  
  
Desc: The application suffers from an unquoted search path issue impacting  
the service 'Tosibox Key Service' for Windows deployed as part of Tosibox  
software application. This could potentially allow an authorized but non-privileged  
local user to execute arbitrary code with elevated privileges on the system.  
A successful attempt would require the local user to be able to insert their  
code in the system root path undetected by the OS or other security applications  
where it could potentially be executed during application startup or reboot.  
If successful, the local user's code would execute with the elevated privileges  
of the application.  
  
Tested on: Windows 10 Home 64 bit (build 9200)  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2024-5812  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5812.php  
  
  
30.01.2024  
  
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C:\Users\ews>sc qc "Tosibox Key Service"  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: Tosibox Key Service  
TYPE : 110 WIN32_OWN_PROCESS (interactive)  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\Program Files (x86)\Tosibox\bin\TosiboxKeyService.exe  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : Tosibox Key Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
C:\Users\ews>  
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