# Exploit Title: AVAST SecureLine 5.5.522.0 - 'SecureLine' Unquoted Service Path# Discovery by: Roberto Piña# Discovery Date: 2020-03-24# Vendor Homepage:https://www.avast.com/# Software Link :https://www.avast.com/es-mx/download-thank-you.php?product=SLN&locale=es-mx# Tested Version: 5.5.522.0# Vulnerability Type: Unquoted Service Path# Tested on OS: Windows 8.1 Single Language x32 es# Step to discover Unquoted Service Path:
C:\>wmic service get name, pathname, displayname, startmode | findstr "Auto"| f
indstr /i /v "C:\Windows\\"| findstr /i "Avast SecureLine"| findstr /i /v """
Avast SecureLine
SecureLine C:\Program Files\AVAST Software\SecureLine\VpnSvc.exe
Auto
C:\>sc qc SecureLine
[SC] QueryServiceConfig CORRECTO
NOMBRE_SERVICIO: SecureLine
TIPO : 10WIN32_OWN_PROCESS
TIPO_INICIO: 2 AUTO_START
CONTROL_ERROR: 1 NORMAL
NOMBRE_RUTA_BINARIO: C:\Program Files\AVAST Software\SecureLine\VpnSvc.exe
GRUPO_ORDEN_CARGA:
ETIQUETA : 0
NOMBRE_MOSTRAR : Avast SecureLine
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.