Vembu StoreGrid 4.0 Privilege Escalation
Posted on 20 October 2016
# 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 FilesMSPRemoteBackupinStoreGrid.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 FilesMSPRemoteBackupapacheApache.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.
