Mastering Computer Programming: A Comprehensive Guide to Python, C, C++, C#, HTML Coding, and Ethical Hacking – Your Fast-Track Path to Expertise! by Kameron Hussain & Frahaan Hussain

Author:Kameron Hussain & Frahaan Hussain
Language: eng
Format: epub
Tags: Computer Programming, Python, C, C++, C#, HTML Coding, Ethical Hacking, Expertise, Comprehensive Guide, Fast-Track Path
Publisher: Sonar Publishing
Published: 2023-10-08T00:00:00+00:00

Section 10.2: SQL Injection and Cross-Site Scripting (XSS)

SQL Injection (SQLi) and Cross-Site Scripting (XSS) are two of the most prevalent web application vulnerabilities, posing significant threats to the security of web-based systems. This section explores these vulnerabilities in detail and provides guidance on how to prevent and mitigate them.

SQL Injection (SQLi)

SQL Injection is a type of security vulnerability that occurs when an attacker inserts malicious SQL code into input fields or parameters that are later used to construct SQL queries. When the web application does not properly validate or sanitize user inputs, an attacker can manipulate these inputs to execute arbitrary SQL commands against the application’s database.

For example, consider a simple login form where a user enters their username and password. If the application constructs an SQL query like this:

SELECT * FROM users WHERE username = 'input_username' AND password = 'input_password';

An attacker could input something like ' OR 1=1— as the username and bypass authentication because the query becomes:

SELECT * FROM users WHERE username = '' OR 1=1 —' AND password = 'input_password';

This modification makes the query always return true (1=1), granting unauthorized access.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.