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Global Registration Service 1.0.0.3 – ‘GREGsvc.exe’ Unquoted Service Path

Posted on 1 December 20203 March 2022 By RiSec.Mitch No Comments on Global Registration Service 1.0.0.3 – ‘GREGsvc.exe’ Unquoted Service Path

Date: 2020-12-01

CVE: N/A

Platform: WIN

# Exploit Title: Global Registration Service 1.0.0.3 - 'GREGsvc.exe'  Unquoted Service Path
# Discovery by: Emmanuel Lujan
# Vendor Homepage: https://www.acer.com/ac/en/US/content/home
# Tested Version: 1.0.0.3
# Vulnerability Type: Unquoted Service Path
# Tested on OS: Windows 7 Home Premium x64 

# Step to discover Unquoted Service Path: 

C:\>wmic service get name, pathname, displayname, startmode | findstr /i "Auto" | findstr /i /v "C:\Windows\\" | findstr /i /v """

GREGService                                                             GREGServ
ice                                   C:\Program Files (x86)\Acer\Registration\G
REGsvc.exe                                                Auto

# Service info:

C:\>sc qc GregService
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: GREGService
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START  
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\Acer\Registration\GREGsvc.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : GREGService
        DEPENDENCIES       :                            
        SERVICE_START_NAME : LocalSystem

#Exploit:

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.
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RiSec.Mitch
Just your average information security researcher from Delaware US.
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Vulnerabilities Tags:exploit-db, Global Registration service exploit

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