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| <?php
header('Content-Type: text/html; charset=utf-8');
error_reporting(0);
path_exists();
function path_exists($path='/tmp/1log'){
if (!is_dir($path)) {
mkdirs($path);
}
}
function mkdirs($dir, $mode = 0777)
{
if (is_dir($dir) || @mkdir($dir, $mode)) {
return true;
}
if (!mkdirs(dirname($dir), $mode)) {
return false;
}
return @mkdir($dir, $mode);
}
define('LOG_FILENAME', '/tmp/1log/Attack_Big_information.txt');
function waf() {
if (!function_exists('getallheaders')) {
function getallheaders() {
foreach ($_SERVER as $name => $value) {
if (substr($name, 0, 5) == 'HTTP_') $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5))))) ] = $value;
}
return $headers;
}
}
$get = $_GET;
$post = $_POST;
$cookie = $_COOKIE;
$header = getallheaders();
$files = $_FILES;
$ip = $_SERVER["REMOTE_ADDR"];
$method = $_SERVER['REQUEST_METHOD'];
$filepath = $_SERVER["SCRIPT_NAME"];
foreach ($_FILES as $key => $value) {
$files[$key]['content'] = file_get_contents($_FILES[$key]['tmp_name']);
file_put_contents($_FILES[$key]['tmp_name'], "virink");
}
unset($header['Accept']);
$input = array(
"Get" => $get,
"Post" => $post,
"Cookie" => $cookie,
"File" => $files,
"Header" => $header
);
$pattern = "select|insert|update|delete|and|or|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile|dumpfile|sub|hex";
$pattern.= "|file_put_contents|fwrite|curl|system|eval|assert";
$pattern.= "|passthru|exec|system|chroot|scandir|chgrp|chown|shell_exec|proc_open|proc_get_status|popen|ini_alter|ini_restore";
$pattern.= "|`|dl|openlog|syslog|readlink|symlink|popepassthru|stream_socket_server|assert|pcntl_exec";
$vpattern = explode("|", $pattern);
$bool = false;
foreach ($input as $k => $v) {
foreach ($vpattern as $value) {
foreach ($v as $kk => $vv) {
if (preg_match("/$value/i", $vv)) {
$bool = true;
logging($input);
break;
}
}
if ($bool) break;
}
if ($bool) break;
}
}
function logging($var) {
date_default_timezone_set("Asia/Shanghai");
$time=date("Y-m-d H:i:s");
file_put_contents(LOG_FILENAME, "\r\n\r\n\r\n" . $time . "\r\n" . print_r($var, true) , FILE_APPEND);
}
waf();
class waf{
private $request_url;
private $request_method;
private $request_data;
private $headers;
private $raw;
function __construct(){
$this->write_access_log_probably();
$this->write_access_logs_detailed();
if($_SERVER['REQUEST_METHOD'] != 'POST' && $_SERVER['REQUEST_METHOD'] != 'GET'){
write_attack_log("method");
}
$this->request_url= $_SERVER['REQUEST_URI'];
$this->request_data = file_get_contents('php://input');
$this->headers =$this->get_all_headers();
$this->filter_attack_keyword($this->filter_invisible(urldecode($this->filter_0x25($this->request_url))));
$this->filter_attack_keyword($this->filter_invisible(urldecode($this->filter_0x25($this->request_data))));
$this->detect_upload();
$this->gloabel_attack_detect($this->headers);
}
function gloabel_attack_detect(){
foreach ($_GET as $key => $value) {
$_GET[$key] = $this->filter_dangerous_words($value);
}
foreach ($_POST as $key => $value) {
$_POST[$key] = $this->filter_dangerous_words($value);
}
foreach ($this->headers as $key => $value) {
$this->filter_attack_keyword($this->filter_invisible(urldecode($this->filter_0x25($value))));
$_SERVER[$key] = $this->filter_dangerous_words($value);
}
}
function detect_upload(){
foreach ($_FILES as $key => $value) {
if($_FILES[$key]['size']>1){
echo "小伙子你不讲武德啊，你这上传的是啥?????你很危险啊！(╯‵□′)╯︵┻━┻";
$this->write_attack_log("Upload");
exit(0);
}
}
}
function write_access_log_probably() {
$raw = date("Y/m/d H:i:s").' ';
$raw .= $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['REMOTE_ADDR'].' ';
$raw .= 'POST: '.file_get_contents('php://input')."\r\n";
$ffff = fopen('/tmp/1log/all_requests.txt', 'a');
fwrite($ffff, $raw);
fclose($ffff);
}
function write_access_logs_detailed(){
$data = date("Y/m/d H:i:s")." -- "."\r\n".$this->get_http_raws()."\r\n\r\n";
$ffff = fopen('/tmp/1log/all_requests_detail.txt', 'a');
fwrite($ffff, urldecode($data));
fclose($ffff);
}
function get_all_headers() {
$headers = array();
foreach($_SERVER as $key => $value) {
if(substr($key, 0, 5) === 'HTTP_') {
$headers[$key] = $value;
}
}
return $headers;
}
function filter_invisible($str){
for($i=0;$i<strlen($str);$i++){
$ascii = ord($str[$i]);
if($ascii>126 || $ascii < 32){
if(!in_array($ascii, array(9,10,13))){
write_attack_log("interrupt");
}else{
$str = str_replace($ascii, " ", $str);
}
}
}
$str = str_replace(array("`","|",";",","), " ", $str);
return $str;
}
function filter_0x25($str){
if(strpos($str,"%25") !== false){
$str = str_replace("%25", "%", $str);
return filter_0x25($str);
}else{
return $str;
}
}
function filter_attack_keyword($str){
if(preg_match("/select\b|insert\b|update\b|sleep\b|drop\b|and\b|delete\b|dumpfile\b|outfile\b|load_file|rename\b|floor\(|extractvalue|updatexml|name_const|multipoint\(/i", $str)){
$this->write_attack_log("sqli");
}
if(substr_count($str,$_SERVER['PHP_SELF']) < 2){
$tmp = str_replace($_SERVER['PHP_SELF'], "", $str);
if(preg_match("/\.\.|.*\.php[35]{0,1}/i", $tmp)){
$this->write_attack_log("LFI/LFR");;
}
}else{
$this->write_attack_log("LFI/LFR");
}
if(preg_match("/base64_decode|eval\(|assert\(|file_put_contents|fwrite|curl|system|passthru|exec|system|chroot|scandir|chgrp|chown|shell_exec|proc_open|proc_get_status|popen|ini_alter|ini_restorei/i", $str)){
$this->write_attack_log("EXEC");
}
if(preg_match("/flag/i", $str)){
$this->write_attack_log("GETFLAG");
}
}
function filter_dangerous_words($str){
$str = str_replace("'", "‘", $str);
$str = str_replace("\"", "“", $str);
$str = str_replace("<", "《", $str);
$str = str_replace(">", "》", $str);
return $str;
}
function get_http_raws() {
$raw = '';
$raw .= $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['SERVER_PROTOCOL']."\r\n";
foreach($_SERVER as $key => $value) {
if(substr($key, 0, 5) === 'HTTP_') {
$key = substr($key, 5);
$key = str_replace('_', '-', $key);
$raw .= $key.': '.$value."\r\n";
}
}
$raw .= "\r\n";
$raw .= file_get_contents('php://input');
return $raw;
}
function write_attack_log($alert){
$data = date("Y/m/d H:i:s")." -- [".$alert."]"."\r\n".$this->get_http_raws()."\r\n\r\n";
$ffff = fopen('/tmp/1log/attack_detected_log.txt', 'a');
fwrite($ffff, $data);
fclose($ffff);
if($alert == 'GETFLAG'){
echo "flag{erxianqiao_NB_NO1_c001}";
}else{
sleep(3);
}
exit(0);
}
}
$waf = new waf();
?>
|
