实践-代码审计-过滤缺陷-文件读取 全局搜索str_replace函数,发现: 控制dir,可以任意读取文件。/include/thumb.php?dir=...///http\...//\config/config_db.php
strpos("1","2")在1中查找二并返回索引或falsestr_replace("1","2","3")在3中找1并替换为2define()定义大小写不敏感的常量!==不全等,完全不同<?php $colors=array("red","green","blue","yellow");foreach($colorsas$value)echo"$value ";array()count()函数用于返回数组的长度(元素数htmlspeci...
phpif(isset($_POST[ 'Submit'] ) ) {//Get input$target=$_REQUEST[ 'ip'];//Set blacklist$substitutions=array('&&' => '', ';' => '',);//Remove any of the charactars in the array (blacklist).$target=str_replace(array_keys($substitutions),$substitutions,$target);//Determine OS...
$file = str_replace("data", "???", $file); $file = str_replace(":", "???", $file); include($file); 1. 2. 3. 4. 5. 在UA头中写入一句话,然后日志包含即可执行命令,日志位置在/var/log/nginx/access.log web82 $file = $_GET['file']; $file = str_replace("php", "???"...
($this,$this->method),$this->args);}}functionping($host){system("ping -c 2 $host");}functionwaf($str){$str=str_replace(' ','',$str);return$str;}function__wakeup(){foreach($this->argsas$k=>$v){$this->args[$k]=$this->waf(trim(mysql_escape_string($v)));}}}$a=@$_...
str_repLace( "int", ":DD", str_repLace( "%69%6e%74", "XDDD", str_repLace( "%2e%2e", "Q___Q", str_repLace( "..", "QAQ", str_repLace( "%33%33%61", ">__<", str_repLace( "%63%3a", "WTF", str_repLace(
原理:服务端对黑名单中的内容进行处理,且仅处理一次,比如说使用str_replace()函数(函数具体使用自行了解),所以可以通过双写后缀绕过。 使用brup抓包,我们直接上传一个1.php 可以看到返回结果php被去空了,当时文件还是上传了,那么我们尝试使用双写绕过1.pphphp ...
str=str.replace("\n"," ").replace("\r"," ").replace("\t"," ").replace(":"," ").split(" ") str = [i for i in str if i != ''] #clear null meta result=[] for i in str: i=i.strip() if i[:2]=="0x": ...
=`tac *`;');$b = str_replace("=","",$b);echo "base64加密后:".$b."\n";$a = call_user_func('bin2hex',$b); #bin2hex可以将base64编码形式转换成16进制字符串形式。echo "16进制形式:".$a."\n";var_dump(is_numeric($a));/*运行结果base64加密后:PD89YHRhYyAqYDs16进制形式:...
> $a =isset($_GET['cmd']) ? $_GET['cmd'] : ''; > foreach ($arr as $v) { > $a = str_replace($v,'',$a); > } > echo shell_exec("curl{$a}4hou.php"); > echo ""; > echo "curl{$a}4hou.php"; > ?> > ```...