Huawei UTPS - Unquoted Service Path Privilege Escalation




Dhruv Shah







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# Exploit Title: Unquoted Service Path Vulnerability in Huawei UTPS Software
# Date: Nov 16 2016
# Author: Dhruv Shah (@Snypter)
# Website:
# Contact:
# Category: local
# Vendor Homepage:
# Version: Versions earlier than UTPS-V200R003B015D16SPC00C983
# Tested on: Windows XP , Windows 7-10 x86/x64
# CVE: CVE-2016-8769

1. Description

Huawei UTPS Software is the core software that is bundled with the
Internet Dongles, it provides it dongles to companies like Airtel ,
TATA Photon . This is the software that installs itself for the Dongle
to run on the attached machine. It installs as a service ("Photon.
RunOUC") and ("Airtel. RunOuc") with an unquoted service path running
with SYSTEM privileges.
This could potentially allow an authorized but non-privileged local
user to execute arbitrary code with elevated privileges on the system.

2. Proof of Concept

 ( TATA PHOTON Dongles)
C:\Documents and Settings\Dhruv>sc qc "Photon. RunOuc"
[SC] GetServiceConfig SUCCESS

SERVICE_NAME: Photon. RunOuc
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : Photon. OUC
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

( Airtel Dongles)
C:\Documents and Settings\Dhruv>sc qc "airtel. Runouc"
[SC] GetServiceConfig SUCCESS

SERVICE_NAME: airtel. Runouc
        TYPE               : 110  WIN32_OWN_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files\airtel\UpdateDog\ouc.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : airtel. OUC
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

3. Exploit:

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.

Additional notes :

Fixed in version UTPS-V200R003B015D16SPC00C983

CVSSv3 Risk Rating
Base Score: 6.4 (AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H )
Temporal Score:  5.9 (E:F/RL:O/RC:C)

Vulnerability Disclosure Timeline:
06/09/2016   -   Contact With Vendor
06/09/2016   -   Vendor Response
15/11/2016   -   Release Fixed Version