Re: Ncrack telnet module

[Daniel Miller <bonsaiviking () gmail com>]

Hi! Thanks for the input. For telnet brute-forcing, the telnet-brute NSE
script [1] is very well suited, with intelligent prompt detection based on
empirical scanning of hundreds of different device types. Here's an example
invocation that tries all username/password combinations from separate
wordlists (default is to only run for 10 minutes):

nmap -p23 --script telnet-brute --script-args
unpwdb.timelimit=0,userdb=users.txt,passdb=passwords.txt
192.0.2.1

Of course, the Ncrack developers on the list may be interested in improving
Ncrack in this regard as well.

Dan

[1] https://nmap.org/nsedoc/scripts/telnet-brute.html

On Tue, Jun 13, 2017 at 7:59 PM, bgqueengeek <bgqueengeek () gmail com> wrote:

> Hi all;
>
> Working with ncrack for scanning some non-standard devices (printers) that
> do support telnet, but do not prompt with "login". Instead, the session
> goes
> straight to the password prompt. Ncrack telnet does not have a way to
> by-pass the login prompt. As such my ncrack scan fails to test the password
> I know is correct. I have tested it with Cygwin telnet no problem.
>
> Most telnet clients handle this ok in an interactive session, but a
> wireshark trace of ncrack indicates ncrack never sees the password prompt.
>
> I have the source for ncrack_telnet, but would rather not have to hack it
> up
> too much. It exists on a linux host, so it builds and installs.
>
> I recognize this is old, but any assistance out there would be greatly
> appreciated.
>
>
>
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