# 22 - SSH

## Nmap

Para facilitar información de este puerto puedes usar sus NSE's correspondientes

{% code overflow="wrap" %}

```
#opcion 1 - todos los que contengan *ssh* en el NSE
nmap -p 22 -sV --script=*ssh* IP

#opcion 2 - específicamente los siguientes
nmap -p 22 -sV --script=ssh-auth-methods,ssh-run,ssh2-enum-algos,ssh-publickey-acceptance,ssh-hostkey IP
```

{% endcode %}

## Probar

### Fuerza bruta

* Hydra:

```bash
hydra -l root -P /usr/share/wordlists/rockyou.txt IP -t 4 ssh
```

{% code overflow="wrap" %}

```bash
hydra -L /usr/share/wordlists/rockyou.txt -P /usr/share/wordlists/rockyou.txt IP -t 4 ssh
```

{% endcode %}

## A tener en cuenta

* En el caso de mostrar el siguiente mensaje de error al intentar autenticarte:

no matching key exchange method found. Their offer: gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1

Usa:

```bash
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 user@IP -p port
```

* Para crear clave publica con clave privada RSA:

<https://www.tbs-certificates.co.uk/FAQ/en/utiliser-cle-openssl-sous-openssh.html>

* Para conectarnos a este servicio usaremos los siguientes comandos:

```
ssh user@IP

ssh user@IP -i id.rsa
```

## Máquinas resueltas que usan SSH

* HTB
  * Cap
  * Latte
  * Forge
  * TwoMillion

## Referencias


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