Lenovo Slim USB Keyboard 1.09 - Unquoted Service Path Privilege Escalation

2016-10-19 20:05:18

# Exploit Title: Lenovo Slim USB Keyboard - Unquoted Service Path Privilege
Escalation
# Date: 10/19/2016
# Exploit Author: Joey Lane
# Version: 1.09
# Tested on: Windows 7 Professional

The Lenovo Slim USB Keyboard service is installed with an unquoted service
path.
This enables a local privilege escalation vulnerability. To exploit this
vulnerability,
a local attacker can insert an executable file in the path of the service.
Rebooting the system or restarting the service will run the malicious
executable with elevated privileges.


This was tested on version 1.09, but other versions may be affected as well.


---------------------------------------------------------------------------

C:\>sc qc Sks8821

[SC] QueryServiceConfig SUCCESS



SERVICE_NAME: Sks8821

TYPE : 20 WIN32_SHARE_PROCESS

START_TYPE : 2 AUTO_START

ERROR_CONTROL : 1 NORMAL

BINARY_PATH_NAME : C:\Program Files\Lenovo\Lenovo Slim USB Keyboard\Sks8821.exe

LOAD_ORDER_GROUP :

TAG : 0

DISPLAY_NAME : Skdaemon Service

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.

Fixes

No fixes

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