Unquoted Service Path Privilege Escalation

vendor:

Wacom Consumer Service

by:

Ross Marks

7,2

CVSS

HIGH

Unquoted Service Path Privilege Escalation

N/A

CWE

Product Name: Wacom Consumer Service

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: No

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows 10 x86/x64

2019

Unquoted Service Path Privilege Escalation

Wacom's "Wacom Consumer Service" installs as a service with an unquoted service path running with SYSTEM privileges. This could potentially allow an authorized but non-privileged localuser to execute arbitrary code with elevated privileges on the system. A successful attempt would require the local attacker must insert an executable file in the path of the service. Upon service restart or system reboot, the malicious code will be run with elevated privileges.

Mitigation:

Ensure that all services have quoted service paths.

Source

Exploit-DB raw data:

Wacom Consumer Service: 	http://www.wacom.com
By Ross Marks:      		http://www.rossmarks.co.uk
Exploit-db:         		https://www.exploit-db.com/author/?a=8724
Category:           		Local
Tested on:          		Windows 10 x86/x64
 
1) Unquoted Service Path Privilege Escalation 
 
Wacom's "Wacom Consumer Service" installs as a service with an unquoted service path running with SYSTEM privileges.
This could potentially allow an authorized but non-privileged localuser to execute arbitrary code with elevated privileges on the system.
 
A successful attempt would require the local attacker must insert an executable file in the path of the service.
Upon service restart or system reboot, the malicious code will be run with elevated privileges.
 
PoC:
 
C:\>sc qc WTabletServiceCon
[SC] QueryServiceConfig SUCCESS
 
SERVICE_NAME: WTabletServiceCon
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files\Tablet\Pen\WtabletServiceCon.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Wacom Consumer Service
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem