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Vulnhub Stapler:1 - Walkthrough

VulnHub Stapler:1 

First we determine the IP address assigned to the server.

We see that the server is on 192.168.213.134

I startup Sparta to scan the box..

We see that we have some interesting ports open. We first check ftp. We have anonymous login but no privileges to do anything

. 



We then turn our attention to the web ports. Port 80 turns up nothing.




We check port 12380 to find a landing page and nothing more.

We run Nikto on port 12380



We see that there is a SSL cert being used. And we find 2 entries - /admin112233 and /blogblog

Let's check out https://192.168.213.134:12380/admin112233




OK? Let's see what is on /blogblog




Look's like we have a Wordpress site. Let's tackle this one first - low hanging fruit!

We run wpscan and see if we can find any users...

wpscan --url https://192.168.213.134:12380/blogblog --enumerate u





OK, We have some users - Let's see if we can get some credentials from this. 

John look's good to start with..

We run 

wpscan --url https://192.168.213.134:12380/blogblog --wordlist /usr/share/wordlists/rockyou.txt --username john



And we get a hit. 
Let's login to the WordPress site..




And we are in and we are an admin...SWEET!





From here is easy to up load a reverse shell using the Plugin feature...

We get our trusty PentestMonkey reverse php shell.. http://pentestmonkey.net/tools/web-shells/php-reverse-shell
 And get it ready..

We start our nc listener on port 9978



Then in wordpress we upload our shell using the plugin feature..



'Upload Plugin'



We browse to our php shell

And install it..Easy as pie!

We go to the media section in wordpress and find our shell..

Click in the shell.php

And we see our link to use,...

We open a new tab in our browser and enter the url - https://192.168.213.134:12380/blogblog/wp-content/uploads/shell.php

We now have our limited shell...



We can see that this box is running Kernel 4.4.0 and after a quick search we find a possible exploit - https://www.exploit-db.com/exploits/39772/

We get the needed package and upload to the victim using wget.



Following the instructions from the exploit we extract the zip file. Then extract the tar file and cd into ebpf_mapfd_doubleput_exploit





From here we run ./compile.sh then ./doubleput




We wait for it...

We got you!

Not too bad. Now we know there are others ways in but this was the 1st run. We can go back and knock on other doors to find other ways in. 

Thanks to g0tmi1k for this boot2root!