ASUS HM Com Service 1.00.31 Unquoted Service Path

2019.11.19

Credit: Olimpia Saucedo

Risk: Low

Local: Yes

Remote: No

CVE: N/A

CWE: N/A

# Exploit Title: ASUS HM Com Service 1.00.31 - 'asHMComSvc' Unquoted Service Path
# Date: 2019-11-16
# Exploit Author : Olimpia Saucedo
# Vendor Homepage: www.asus.com
# Version: 1.00.31
# Tested on: Windows 10 Pro x64 (but it should works on all windows version)
The application suffers from an unquoted service path issue impacting the service 'ASUS HM Com Service (aaHMSvc.exe)' related to the Asus Motherboard Utilities.
This could potentially allow an authorized but non-privileged local user to execute arbitrary code with system privileges.
POC:
>wmic service get name,pathname,displayname,startmode | findstr /i auto | findstr /i /v "C:\Windows\\" | findstr /i /v """
ASUS HM Com Service asHmComSvc
C:\Program Files (x86)\ASUS\AAHM\1.00.31\aaHMSvc.exe
Auto
>sc qc "asHMComSvc"
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: asHMComSvc
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Program Files (x86)\ASUS\AAHM\1.00.31\aaHMSvc.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : ASUS HM Com Service
DEPENDENCIES : RpcSs
SERVICE_START_NAME : LocalSystem

See this note in RAW Version

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ASUS HM Com Service 1.00.31 Unquoted Service Path

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