Fuzzer for freeFTPd 1.0.8

From working with freeFTPd 1.0.8 in the previous post and finding that a buffer overflow could occur on the username field if I enabled logging.  I build the below script to test other functions of the FTP server.  I developed the below fuzzer to identify them, however none surfaced.  I also experimented with unicode characters.



#!/usr/bin/python

import socket

server = '172.16.102.142' # Change to the IP Address of Windows 7 SP1 VM
destPort = 21

hexValues = ["\x00","\x01","\x02","\x03","\x04","\x05","\x06","\x07","\x08","\x09","\x0a","\x0b","\x0c","\x0d","\x0e","\x0f","\x10","\x11","\x12","\x13","\x14","\x15","\x16","\x17","\x18","\x19","\x1a","\x1b","\x1c","\x1d","\x1e","\x1f","\x20","\x21","\x22","\x23","\x24","\x25","\x26","\x27","\x28","\x29","\x2a","\x2b","\x2c","\x2d","\x2e","\x2f","\x30","\x31","\x32","\x33","\x34","\x35","\x36","\x37","\x38","\x39","\x3a","\x3b","\x3c","\x3d","\x3e","\x3f","\x40","\x41","\x42","\x43","\x44","\x45","\x46","\x47","\x48","\x49","\x4a","\x4b","\x4c","\x4d","\x4e","\x4f","\x50","\x51","\x52","\x53","\x54","\x55","\x56","\x57","\x58","\x59","\x5a","\x5b","\x5c","\x5d","\x5e","\x5f","\x60","\x61","\x62","\x63","\x64","\x65","\x66","\x67","\x68","\x69","\x6a","\x6b","\x6c","\x6d","\x6e","\x6f","\x70","\x71","\x72","\x73","\x74","\x75","\x76","\x77","\x78","\x79","\x7a","\x7b","\x7c","\x7d","\x7e","\x7f","\x80","\x81","\x82","\x83","\x84","\x85","\x86","\x87","\x88","\x89","\x8a","\x8b","\x8c","\x8d","\x8e","\x8f","\x90","\x91","\x92","\x93","\x94","\x95","\x96","\x97","\x98","\x99","\x9a","\x9b","\x9c","\x9d","\x9e","\x9f","\xa0","\xa1","\xa2","\xa3","\xa4","\xa5","\xa6","\xa7","\xa8","\xa9","\xaa","\xab","\xac","\xad","\xae","\xaf","\xb0","\xb1","\xb2","\xb3","\xb4","\xb5","\xb6","\xb7","\xb8","\xb9","\xba","\xbb","\xbc","\xbd","\xbe","\xbf","\xc0","\xc1","\xc2","\xc3","\xc4","\xc5","\xc6","\xc7","\xc8","\xc9","\xca","\xcb","\xcc","\xcd","\xce","\xcf","\xd0","\xd1","\xd2","\xd3","\xd4","\xd5","\xd6","\xd7","\xd8","\xd9","\xda","\xdb","\xdc","\xdd","\xde","\xdf","\xe0","\xe1","\xe2","\xe3","\xe4","\xe5","\xe6","\xe7","\xe8","\xe9","\xea","\xeb","\xec","\xed","\xee","\xef","\xf0","\xf1","\xf2","\xf3","\xf4","\xf5","\xf6","\xf7","\xf8","\xf9","\xfa","\xfb","\xfc","\xfd","\xfe","\xff"]

unicodeValues = ["\ufeff","\u202e","\u180e"]

commands = ["MKD", "STOR", "CWD", "RETR", "DELE", "LIST"] 

for i in range(0,len(hexValues)):
#for i in range(0,len(unicodeValues)):
 for command in commands:
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  connect = s.connect((server, destPort))
  bufCreated = hexValues[i] * 3000
  #print bufCreated
  # Receive the Banner that is returned after the initial connection
  #s.recv(1024)
  print s.recv(1024)
  print i

  # Send the username to login with
  userString = "USER ftp" + "\r\n"
  s.send(userString)
  #s.recv(1024)
  print s.recv(1024)

  # Send the password to login with
  passString = "PASS ftp" + "\r\n"
  s.send(passString)
  print s.recv(1024)

  ftpRequest = command + bufCreated + "\r\n"
  s.send(ftpRequest)
  print s.recv(1024)

  s.close()





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