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dvwa靶场sql通关教程

时间: 2025-03-27 22:30:40 浏览: 42

### DVWA SQL Injection Level Walkthrough Tutorial In the Damn Vulnerable Web Application (DVWA), the SQL Injection vulnerability can be explored through various security levels, starting from low to high. For a basic understanding of how this works at the lowest difficulty setting: The application allows users to input data into fields such as 'Username' and 'Password'. When these inputs are not properly sanitized or validated before being used within an SQL query, attackers may exploit this weakness by injecting malicious code directly into those parameters[^1]. For instance, when attempting authentication with crafted entries like `admin' --` in both username and password boxes, it effectively terminates the string comparison operation early due to comment syntax (`--`) causing any subsequent characters including closing quotes to become comments rather than part of executable commands. To verify whether successful exploitation has occurred after submitting altered credentials: - Observe if login succeeds without matching actual stored passwords. - Check database logs for evidence of injected queries that bypassed intended logic checks. A practical demonstration involves using Burp Suite Proxy tool which helps intercept HTTP requests between browser client sessions and server responses allowing manual modification prior submission back towards target web service endpoint under test conditions only. ```sql SELECT * FROM users WHERE user = 'admin' -- ' AND password = '' ``` This example shows what happens behind the scenes where everything following `--` is treated as a comment thus ignoring the rest of the original statement structure leading up until end delimiter; thereby granting unauthorized access based purely on malformed parameter values provided during form submissions.

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