ftpkiller.py

#!/usr/bin/env/python

import telnetlib
import sys

host         = sys.argv[1]
port         = sys.argv[2]
commandlist  = sys.argv[3]

for line in open(commandlist,"r"):
  for i in range(1,256):
    t = telnetlib.Telnet(host, port)
    sstring = line+" "+"0"*i+"\n"
    t.write(line+" "+sstring)
    a = t.read_until(" ",5)
    print(line+" "+a+" "+"fuzz"+" "+str(i))
    if a == "":
      print("potential bug located: "+sstring)
    t.close()

-----------CUT CUT CUT

commandlist.txt

ABOR
ACCT
ADAT
ALGS
ALLO
APPE
AUTH
AUTH+
CCC
CDUP
CONF
CWD
DELE
ENC
EPRT
EPSV
FEAT
HELP
HOST
LANG
LIST
LPRT
LPSV
MDTM
MIC
MKD
MLSD
MLST
MODE
NLST
NOOP
OPTS
PASS
PASV
PBSZ
PBSZ+
PORT
PROT
PROT+
PWD
QUIT
REIN
REST
REST+
RETR
RMD
RNFR
RNTO
SITE
SIZE
SMNT
STAT
STOR
STOU
STRU
SYST
TYPE
USER
XCUP
XCWD
XMKD
XPWD
XRMD
-N/A-