Realtek Andrea RT Filters 1.0.64.10 - 'AERTSr64.EXE' Unquoted Service Path

2020-11-09
ID: 103520
CVE: None
Download vulnerable application: None
# Exploit Title: 
# Discovery by: Erika Figueroa
# Discovery Date: 2020-11-07
# Vendor Homepage:  https://www.realtek.com/en/
# Tested Version: 1.0.64.10
# Vulnerability Type: Unquoted Service Path
# Tested on OS: Windows 8.1 x64 es

# Step to discover Unquoted Service Path: 

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

Andrea RT Filters Service                                               AERTFilters                         C:\Program Files\Realtek\Audio\HDA\AERTSr64.EXE                Auto

# Service info:

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

NOMBRE_SERVICIO: AERTFilters
        TIPO               : 10  WIN32_OWN_PROCESS
        TIPO_INICIO        : 2   AUTO_START
        CONTROL_ERROR      : 1   NORMAL
        NOMBRE_RUTA_BINARIO: C:\Program Files\Realtek\Audio\HDA\AERTSr64.EXE
        GRUPO_ORDEN_CARGA  :
        ETIQUETA           : 0
        NOMBRE_MOSTRAR     : Andrea RT Filters Service
        DEPENDENCIAS       :
        NOMBRE_INICIO_SERVICIO: 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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