<?php //flag 在flag.php error_reporting(0); echo '<title>post_me</title>'; if($_SERVER['REQUEST_METHOD'] == 'POST'){ highlight_file(__FILE__); } class get_week{ public $tmp; public $date; function __construct($tmp,$date){ $this->tmp=$tmp; $this->date=$date; } function get_weekday(){ $date_str=date('Y-m-d',strtotime($this->date)); $arr=explode("-", $date_str); $year=$arr[0]; $month=sprintf('%02d',$arr[1]); $day=sprintf('%02d',$arr[2]); $hour = $minute = $second = 0; $strap = mktime($hour,$minute,$second,$month,$day,$year); $number_wk=date("w",$strap); $weekArr=array("星期日","星期一","星期二","星期三","星期四","星期五","星期六"); return $weekArr[$number_wk]; } } class Author{ public $a = 'hkcc'; function __destruct(){ $res = 'Author: '.$this->a; echo $res; } } class Unknown{ public $u = 'welcome.php'; function __toString(){ echo file_get_contents($this->u); } } function change($mi){ return str_replace('---','-',$mi); } $test = new get_week($_POST['tmp'],$_POST['date']); unserialize(change(serialize($test))); ?>

这段代码存在严重的安全问题，特别是在处理用户输入和执行反序列化操作时。攻击者可以通过构造恶意的`$_POST['tmp']`和`$_POST['date']`参数来传递经过修改的序列化字符串，从而触发`unserialize()`函数，使得恶意代码得以执行。

以下是一种可能的攻击方式：

1. 攻击者构造恶意的`$_POST['tmp']`和`$_POST['date']`参数，将其传递给目标服务器。
2. 攻击者将恶意代码序列化，并修改序列化字符串中的"`---`"为"`-`"，＊＊＊

相关问题

The char '0x1a' after '<?xml version="1.0" encoding="UTF-8"?><r><flag>0</flag><errorDesc>unclosed string : ' is not a valid XML character.

You are correct, the character '0x1a' (ASCII SUB or substitute character) is not a valid XML character and can cause parsing errors. It is likely that the string you are trying to parse contains this character, which should be removed or replaced with a valid XML character before parsing.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:arch="http://arch.service.general.ieslab.com/"> <soapenv:Header/> <soapenv:Body> <arch:WS_TMNL_TASK_SR><root><WS_TMNL_TASK_SR> <arg0><![CDATA[<?xml version="1.0" encoding="UTF-8" ?><DBSET><ROW><COL NAME="APP_NO">77777</COL><COL NAME="TERMINAL_ID">77777</COL><COL NAME="TMNL_TASK_TYPE">05</COL><COL NAME="CONS_CHG_TYPE">05</COL><COL NAME="METER_FLAG">1</COL><COL NAME="CONS_NO">77777</COL><COL NAME="TG_ID">77777</COL><COL NAME="MP_NO">77777</COL><COL NAME="TYPE_CODE">01</COL><COL NAME="USAGE_TYPE_CODE">01</COL><COL NAME="NEW_TERMINAL_ID"></COL><COL NAME="ELEC_ADDR">四川省绵阳市游仙区梓棉乡葫芦村委会四社</COL><COL NAME="CONS_ID">40522489463</COL><COL NAME="CP_NO">77777</COL><COL NAME="WKST_APP_NO">202211456584</COL><COL NAME="TERMINAL_TYPE_CODE">05</COL></ROW></DBSET>]]></arg0> </WS_TMNL_TASK_SR></root></arch:WS_TMNL_TASK_SR> </soapenv:Body> </soapenv:Envelope> 这是请求的xml。然后这是它的报错信息org.apache.cxf.interceptor.Fault: Message part {"http://arch.service.general.ieslab.com/" } was not recognized. (Does it exist in service WSDL?)，能否帮忙判断错误原因并帮忙解决

根据报错信息可以看出，该错误是由于服务端无法识别请求中的消息部分导致的。这可能是由于请求消息中的命名空间与服务端不匹配导致的。建议检查请求消息中的命名空间是否正确，并与服务端的命名空间是否匹配。如果命名空间匹配不上，可以将请求消息中的命名空间改为服务端的命名空间，然后重新发送请求。另外，还可以尝试从服务端获取 WSDL 文件，确定其中的命名空间是否正确。如果问题仍然存在，建议联系服务端的开发人员进行进一步排查。