Web Security: Common Vulnerabilities And Their Mitigation - SQLi mitigation - Escaping user input, least privilege, whit

The video tutorial covers SQL injection mitigation techniques, focusing on escaping user input, validating input, applying the principle of least privilege, and using whitelist validation. It explains how to escape special SQL characters using language-specific methods, validate input patterns, and hex encode data to prevent SQL injection. The principle of least privilege is discussed to ensure database accounts have minimal access. Whitelist validation is recommended for structured input fields.

What is the purpose of escaping user input in SQL queries?

• To enhance user experience

• To prevent SQL injection attacks

• To reduce server load

• To improve database performance

Which method is used to escape user input in MySQL when using PHP?

• sanitize_input

• escape_input

• real_escape_string

• escape_string

What is hex encoding used for in SQL injection prevention?

• To compress data

• To encrypt data

• To ensure only hexadecimal characters are stored

• To convert data to binary

What does the principle of least privilege entail?

• Giving admin privileges to application accounts

• Allowing read access to all tables

• Providing only necessary permissions to database accounts

• Granting all permissions to all users

How should privileges be allocated to database accounts?

• Use a random allocation method

• Grant all privileges by default

• Start with no privileges and add as needed

• Start with full privileges and remove as needed

What is the main challenge of whitelist validation?

• Improving database speed

• Ensuring data is encrypted

• Validating free text

• Defining patterns for structured input

What is a recommended strategy for handling free text input?

• Allow all characters

• Define a maximum length and allow only printable characters

• Convert all text to uppercase

• Use only numeric input