Re: A little Help with Pen Testing My systems!

[miguel.dilaj () pharma novartis com]

"mike Hughes" <mikehughes013 () hotmail com>
11/03/2003 04:27

 
        To:     pen-test () securityfocus com
        cc: 
        Subject:        A little Help with Pen Testing My systems!


Hi Mike


> I have set up a little network at home, for "my own Penetration Testing 
> Purposes". 2 Windows machines and 2 Linux. I have 1 Windows machine on 
its 
> own network running windows XP default install and (Zonealarm, Sygate)

Cool. Good for practice ;-)


> My question:
>
> I want to try to see what approach people take to find Exploits and 
> Vulnerbilites on a system like this. Soo the first steps i took is:

First: the right order is vulnerabilities, then xploits (if they're 
available).
I think that perhaps you don't have very clear the concept of a xploit. 
The xploit is the mechanism you use to... well, EXPLOIT a vulnerability 
you found. It can be a command with certain parameters, a wicked URL, a C 
program, etc etc etc.
If you browse throu differed BIDs in SecurityFocus, you will see that 
different vulnerabilities have different TYPES of xploits, and some of 
them didn't have a xploit so far.


> installed SYGATE with default settings on Windows XP machine, Went over 
to 

Just a comment. Never used SYGATE myself.


> Linux and ran a NMAP scan:
> nmap -vv -sS -P0 111.111.111.111
> all ports are filtered
> And SYGATE detected it as only MINOR port scans it didnt even come up 
with 
> an ALERT-just logged it!

That seems to be good.


> So then tryed NESSUS against this machine and got back:
> results|111.11.111.11|ntp (123/udp)|10884|Security Note|\nIt is possible 
to 
> determine a lot of information about the remote host \nby querying th$
> results|111.11.111.11|ntp (123/udp)|10647|Security Warning|\nAn NTP 
server 
> is running on the remote host. Make sure that\nyou are running the lat$
>
>        So i know i would go to sites like Buqtraq,Security Focus and 
look 
> for documents on this service and see what i can do with it?

USUALLY 123 is NTP (Network Time Protocol), dunno if XP has this open for 
different purposes (you can never trust Micro$oft ;-)


> But if it is behind a firewall can it still be exploited???and would 
disable 
> the firewall first? or...<-------

Let me explain. In the nmap scan above you did a SYN scan, that's TCP. 
Nessus detected 123/udp open, not TCP.
Your firewall seems not to be blocking UDP.


> Than i installed zonealarm and searched for exploits on it and found this 

> nmap exploit and ran an NMAP scan like this:

Sorry, this is not a xploit. This is just a way to use nmap (source port 
scanning). Has NOTHING to do with a xploit.


> nmap -g67 -P0 -sS 111.11.111.111
> And all the ports are filtered :
> nmap -vv -sS -P0 -p 1-1064 111.11.111.111 -D www.blah.org
> A site I visted from the windows machine earlier for a bounce attack and 
> still nothing.
>
> My nest option was going to try HPING2 and try to set the Fragment to "0" 

> and run that against the Firewalled machine too see what happens.

No, just try to use nmap's 'UDP scan'.


> I also remember Windows XP installs MSN Messenger by default. Soo i 
searched 

Sorry again, this is Windows Messenger, and has nothing to do with MSN 
Messenger...


> around more and found this:
>
> http://www.mynetwatchman.com/winpopuptester.asp

Didn't know this link, thanks!


> And i ran the test with SYGATE firewall enabled, and a POP-WINDOW POPPED 
UP 
> Soo that means it can be accesiable right??
> "cause the POP-UP came right through"
> So that means something is open amd that my SCANS DIDNT PICK UP??  ----> 
How 
> come?

Could be that you'r firewall isn't protecting you in the right way? Or 
perhaps is "stealthing" your ports, but they still answer a proper 
request.
I've no experience with SYGATE, but I recommend that you read the 
documentation that come with the product.


> Soo can anyone tell me i DONT mean step by step "but(SUGGESTIONS, IDEAS)" 
on 
> how do people exploit things or "how they do there own assesments" like 
> this.(for learning purposes). I have done alittle bit of homeowrk but NOT 


Get as much information as possible about the target, that include proper 
port scans, service identification, banner grabbing, etc.
Do some search about the services available, to detect those with 
vulnerabilities (Nesuss can help, but beware of false positives). Check if 
those with vulnerabilities have xploits available. Got information about 
the xploits, and the xploits themselves if they're programs.
Create a situation similar to your target in your lab.
TEST all the xploits and techniques in your lab, until both you're 
confident, and you what works and what won't work.
USE the working xploits on the target.


> ENOUGH.. I want to test HPING against it too but there are just soo many 
> commands anyone have any good command string they use to test FIREWALLS? 
How 

I think that you're trying to get all the information at once, and are 
getting confused. Go slowly, step by step. I'm here right now, but I 
started with computerized systems in 1982, and with IT security around 
1997.
You've to UNDERSTAND how tools like hping2 works, not to use a recipe.


> would some of you approach something like this: im really trying to get 
into 
> more secuirty now by reading and playing but am sort of "stumped right 
now!" 
> Any ideas (tips) i should try or should do differently that would help me 
on 
> my testings.Again this is all against my own machines... and im not 
asking 
> steps but maybe a little push..just to learn more about the secuiry 
issues 
> with them and learn how hackers would approach ISSUES like this. Ohh ya i 

> found this code also for bypassing firewalls but dont understand it, i 
wanna 
> learn about it beofore i try it and play with it from here: 
> http://www.der-keiler.de/Mailing-Lists/securityfocus/bugtraq/2003-02/0268.html

I'll try to visit this link later.


> Thanks Mike

I'll suggest that you put your hands on the excellent book "Hacking 
Exposed, 4th edition".
Cheers,

Nekromancer











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