Telefonica O2 Connection Manager 8.7 - Service Trusted Path Privilege Escalation


Telefonica O2 Connection Manager 8.7 Service Trusted Path Privilege Escalation


Vendor: Telefonica S.A.
Product web page: http://www.telefonica.com | http://www.o2.co.uk
Affected version: 8.7.6.792

Summary: O2 Connection Manager will help you to manage your internet
connections by getting you connected to the fastest available network.
Automatically connect you to the fastest available network including
your home broadband if you have a wireless router.

Desc: The O2 Connection Manager's service suffers from an unquoted
search path issue impacting the Import WiFi 'TGCM_ImportWiFiSvc'
service for Windows. This could potentially allow an authorized but
non-privileged local user to execute arbitrary code with elevated
privileges on the system. 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. 

Tested on: Microsoft Windows 7 Professional SP1 (EN)
           Microsoft Windows 7 Ultimate SP1 (EN)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2014-5200
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5200.php


22.09.2014

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C:\>sc qc TGCM_ImportWiFiSvc
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: TGCM_ImportWiFiSvc
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\O2\Connection Manager\ImpWiFiSvc.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : TGCM_ImportWiFiSvc
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

C:\>icacls "C:\Program Files (x86)\O2\Connection Manager\ImpWiFiSvc.exe"
C:\Program Files (x86)\O2\Connection Manager\ImpWiFiSvc.exe NT AUTHORITY\SYSTEM:(I)(F)
                                                            BUILTIN\Administrators:(I)(F)
                                                            BUILTIN\Users:(I)(RX)

Successfully processed 1 files; Failed processing 0 files

C:\>

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