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Try Hack Me/Brains

Write-up / THM / Brains



brains.webp

 

Start the Virtual Machine

Run an nmap scan to the VM machine

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From the nmap scan:  nmap -sS -sC -sV IP_THM_VM_machine

Ports 22, 80, and 50000 are open

VM machine is an Ubuntu Linux

Connect to port 80 using a web browser

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In the result of the nmap, port 50000 is also open and observing the result it is an http server

50000/tcp open  ibm-db2?
| fingerprint-strings: 
|   GetRequest: 
|     HTTP/1.1 401 
|     TeamCity-Node-Id: MAIN_SERVER
|     WWW-Authenticate: Basic realm="TeamCity"
|     WWW-Authenticate: Bearer realm="TeamCity"
|     Cache-Control: no-store
|     Content-Type: text/plain;charset=UTF-8
|     Date: Fri, 18 Oct 2024 01:48:03 GMT
|     Connection: close
|     Authentication required
|     login manually go to "/login.html" page
|   drda, ibm-db2, ibm-db2-das: 
|     HTTP/1.1 400 
|     Content-Type: text/html;charset=utf-8
|     Content-Language: en
|     Content-Length: 435
|     Date: Fri, 18 Oct 2024 01:48:03 GMT
|     Connection: close
|     <!doctype html><html lang="en"><head><title>HTTP Status 400 
|     Request</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 400 

TeamCity-Node-Id: MAIN_SERVER

Connect to port 50000 using the web browser

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The webserver has an application of Teamcity Version 2023.11.3 (build 147512)

Search the vulnerability of the Teamcity version 2023.11.3 in internet.

https://vulners.com/nuclei/NUCLEI:CVE-2024-23917

 

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The application Teamcity has a vulnerability of remote code execution (RCE)

Check if the Teamcity vulnerability exist in the Metasploit Framework

 

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