Box Info #
| OS | Linux |
|---|---|
| Difficulty | Easy |
As is common in real life pentests, you will start the Planning box with credentials for the following account: admin / 0D5oT70Fq13EvB5r
Nmap #
[root@kali] /home/kali/Planning
❯ nmap planning.htb -sV -A
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 9.6p1 Ubuntu 3ubuntu13.11 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 256 62:ff:f6:d4:57:88:05:ad:f4:d3:de:5b:9b:f8:50:f1 (ECDSA)
|_ 256 4c:ce:7d:5c:fb:2d:a0:9e:9f:bd:f5:5c:5e:61:50:8a (ED25519)
80/tcp open http nginx 1.24.0 (Ubuntu)
|_http-server-header: nginx/1.24.0 (Ubuntu)
|_http-title: Edukate - Online Education Website
80端口没有什么可以利用的东西，尝试爆破子域名
Subdomain Fuzz #
[root@kali] /home/kali/Planning
❯ ffuf -u http://planning.htb/ -w /usr/share/fuzzDicts/subdomainDicts/main.txt -H "Host:FUZZ.planning.htb" -fs 178
/'___\ /'___\ /'___\
/\ \__/ /\ \__/ __ __ /\ \__/
\ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\
\ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/
\ \_\ \ \_\ \ \____/ \ \_\
\/_/ \/_/ \/___/ \/_/
v2.1.0-dev
________________________________________________
:: Method : GET
:: URL : http://planning.htb/
:: Wordlist : FUZZ: /usr/share/fuzzDicts/subdomainDicts/main.txt
:: Header : Host: FUZZ.planning.htb
:: Follow redirects : false
:: Calibration : false
:: Timeout : 10
:: Threads : 40
:: Matcher : Response status: 200-299,301,302,307,401,403,405,500
:: Filter : Response size: 178
________________________________________________
grafana [Status: 302, Size: 29, Words: 2, Lines: 3, Duration: 98ms]
添加grafana.planning.htb到/etc/hosts
CVE-2024-9264 #
经过搜索我找到了一个可以拿到shell的cve
当前应该是在docker环境中，需要逃逸出去
查看一下env环境变量
GF_SECURITY_ADMIN_PASSWORD=RioTecRXXXXXXXXXXXXXXX
GF_SECURITY_ADMIN_USER=enzo
可以直接登录ssh
Root #
找到一个json文件
❯ cat crontab.db| jq
{
"name": "Grafana backup",
"command": "/usr/bin/docker save root_grafana -o /var/backups/grafana.tar && /usr/bin/gzip /var/backups/grafana.tar && zip -P P4ssw0rdS0pRi0T3c /var/backups/grafana.tar.gz.zip /var/backups/grafana.tar.gz && rm /var/backups/grafana.tar.gz",
"schedule": "@daily",
"stopped": false,
"timestamp": "Fri Feb 28 2025 20:36:23 GMT+0000 (Coordinated Universal Time)",
"logging": "false",
"mailing": {},
"created": 1740774983276,
"saved": false,
"_id": "GTI22PpoJNtRKg0W"
}
{
"name": "Cleanup",
"command": "/root/scripts/cleanup.sh",
"schedule": "* * * * *",
"stopped": false,
"timestamp": "Sat Mar 01 2025 17:15:09 GMT+0000 (Coordinated Universal Time)",
"logging": "false",
"mailing": {},
"created": 1740849309992,
"saved": false,
"_id": "gNIRXh1WIc9K7BYX"
}
里面有一个密码：P4ssw0rdS0pRi0T3c，但不是root的密码
没有找到能用的东西，查看一下端口开放情况
enzo@planning:~$ ss -tuln
Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
udp UNCONN 0 0 127.0.0.54:53 0.0.0.0:*
udp UNCONN 0 0 127.0.0.53%lo:53 0.0.0.0:*
tcp LISTEN 0 151 127.0.0.1:3306 0.0.0.0:*
tcp LISTEN 0 511 0.0.0.0:80 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.1:37121 0.0.0.0:*
tcp LISTEN 0 70 127.0.0.1:33060 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.54:53 0.0.0.0:*
tcp LISTEN 0 4096 127.0.0.1:3000 0.0.0.0:*
tcp LISTEN 0 511 127.0.0.1:8000 0.0.0.0:*
tcp LISTEN 0 4096 *:22 *:*
注意到开放了一个8000端口，将其转发出来
[root@kali] /home/kali/Planning
❯ ssh enzo@planning.htb -L 8000:127.0.0.1:8000
尝试了一下，可以直接这样登录👇
实际上就是一个定时任务的web控制端
可以直接写入设置SUID的命令
运行之后即可看到成功提权
Summary #
User: 子域名爆破，用已知的用户名和密码登录到后台，通过CVE拿到docker容器的shell，在环境变量中拿到enzo的登录密码。
Root: 在/opt/crontabs目录下拿到一个密码，内网8000端口转发出去可以用于web登录，设置定时任务设置bash的SUID。