netcat with ssl support

Hey guys,

in BT3 was GNU netcat with SSL support included. In BT4 it isnt any more. I think the SSL support is quite helpfull for security audits, so it would be gread if you can provide a GNU-netcat package which has SSL support enabled.

thx
m-1-k-3

Quote:

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Originally Posted by m-1-k-3

Hey guys,

in BT3 was GNU netcat with SSL support included. In BT4 it isnt any more. I think the SSL support is quite helpfull for security audits, so it would be gread if you can provide a GNU-netcat package which has SSL support enabled.

thx
m-1-k-3

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Isn't this exactly what cryptcat is?

Yes, it is CryptCat. Netcat by design did not have any encryption.

There is also Socat.

more info: Top 2 Netcats

Quote:

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Originally Posted by Mr-Protocol

Yes, it is CryptCat. Netcat by design did not have any encryption.

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Backtrack 3:

Code:

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bt ~ # netcat -E --dontcheckhost www.xyz.de 443
GET / HTTP/1.0

HTTP/1.1 200 OK
Date: Fri, 09 Apr 2010 15:10:09 GMT
Server: Apache
Last-Modified: Wed, 10 Jan 2007 09:16:58 GMT
Content-Length: 151
Connection: close
Content-Type: text/html

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Cryptcat is not working with SSL.

m-1-k-3

you can use netcat from BT3 also in BT4, just copy the netcat binary (located in /usr/local/bin/netcat - BT3)

on BT4 do the following:

Code:

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root@bt:~# file netcat
netcat: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.16, dynamically linked (uses shared libs), stripped
root@bt:~# ./netcat -h
./netcat: error while loading shared libraries: libssl.so.0: cannot open shared object file: No such file or directory

root@bt:~# ln -s /usr/lib/libssl.so.0.9.8 /usr/lib/libssl.so.0
root@bt:~# ln -s /usr/lib/libcrypto.so.0.9.8 /usr/lib/libcrypto.so.0

root@bt:~# ./netcat -h
GNU netcat 0.7.1, a rewrite of the famous networking tool.
...

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I think I understand more of what you are asking for.(probably a language barrier but hopefully we can work through it.) By default BT4 final has netcat, cryptcat, and socat all installed.

These commands should help you to get on your way, in a terminal type:

Code:

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nc -h

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Code:

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cryptcat -h

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Code:

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socat -h

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I'm not sure yet whether you are trying to enumerate a listening ssl port or attempt to connect to a ssl server. Hopefully these should help you do what you are wishing.

From what I've seen from an unknown source is that the developer of netcat no longer supports it. They probably aren't around anymore. It's uses are amazing and work very well even to this day, I have nothing to complain about with netcat. Although I like getting used to newer tools based off of netcat such as socat or cryptcat. They are all good tools to have and provide a lot of functionality in a quick and easy to use payload. As far as I remember most BT distributions had at least netcat and probably cryptcat aswell. Socat is fairly new I believe but can be found in the latest version of BT.

Taking a closer look at the socat help you will see some openssl commands that take host:port inputs and you can also setup a ssl listener. It has a lot of interesting stuff like proxies, piping and tunneling. IPv4 and IPv6 suport.

Hope this helps and good luck!

If you want true SSL connections then just use openssl in s_client mode.

Code:

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openssl s_client -connect www.google.com:443

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