Nmap Development: Re: simulating FTP bounce attack using nmap

[majek04 <majek04+nmap-dev () gmail com>]

On 8/31/07, Mbzaman L <query.security () gmail com> wrote:
> Greeting All,
>
>     I am trying to simulate the old FTP bounce attack . This is an old
> attack
>     and I believe most of the FTP servers available today are not prone to
> such
>     type of attacks.
>     I am using vsftpd package for implementing FTP server . Also using
> anonymous user I can
>     upload files to the  FTP server. The FTP server also supports passive
> mode as the following
>     commands shows...
Well, unfortunately anonymous user + PASV + upload is not enough for
ftp server to allow ftp bounce.

The server must allow "PORT" command with ip different than yours.

You can look at my NSE script for finding ftp bounce servers:
http://ai.pjwstk.edu.pl/~majek/private/nmap/ftpbounce.lua

In my script the key ftp command is (ip specified below is scanme.insecure.org):
PORT 205,217,153,62,80,80\r\n

Chers!
Marek Majkowski

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