Web Development Security Best Practices
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Questions and Answers

Where should untrusted data not be placed?

  • In comments (correct)
  • In a database
  • In CSS (correct)
  • Between HTML tags (correct)
  • What is the recommended header type to prevent XSS attacks?

  • text/html
  • text/css
  • application/javascript
  • application/json (correct)
  • What is the primary method of preventing CSRF attacks?

  • One-time tokens (correct)
  • Using JS frameworks
  • Sanitizing HTML markup
  • Input validation
  • What is a common goal of a CSRF attack?

    <p>Gain access to the website</p> Signup and view all the answers

    What is a common way phishing attacks are sent?

    <p>Through email</p> Signup and view all the answers

    What is the primary method of preventing XSS attacks?

    <p>Sanitizing HTML markup</p> Signup and view all the answers

    What is a common vulnerability that can lead to CSRF attacks?

    <p>Lack of input validation</p> Signup and view all the answers

    What is the goal of a phishing attack?

    <p>To take control of the user's machine</p> Signup and view all the answers

    What is the recommended practice when using untrusted data in HTML?

    <p>Escape the data in the HTML body</p> Signup and view all the answers

    A CSRF attack can be prevented by using session cookies.

    <p>False</p> Signup and view all the answers

    What is the goal of a phishing attack?

    <p>To gain unauthorized access to a user's machine or credentials</p> Signup and view all the answers

    Using a ___________ token can help prevent CSRF attacks.

    <p>one-time</p> Signup and view all the answers

    Match the following security terms with their descriptions:

    <p>XSS = Injection of malicious scripts into a website CSRF = Abuse of legitimate user's credentials Phishing = Social engineering attack to gain unauthorized access</p> Signup and view all the answers

    What is a common way for an attacker to initiate a CSRF attack?

    <p>Through a phishing email</p> Signup and view all the answers

    Sanitizing HTML markup can help prevent XSS attacks.

    <p>True</p> Signup and view all the answers

    What is the recommended header type to use when transmitting JSON data?

    <p>application/json</p> Signup and view all the answers

    Study Notes

    XSS (Cross-Site Scripting) Prevention

    • Untrusted data should only be placed in allowed locations, never in tags, comments, attribute names, or tag names
    • Untrusted data should be escaped in the HTML body (e.g., in div's)
    • Use application/json headers instead of text/html
    • Sanitize HTML markup using proper libraries
    • Properly use current JS frameworks

    CSRF (Cross-Site Request Forgery) Attack

    • A type of attack where a malicious user sends a link to a legitimate user, who is logged in to a website, to gain access to the website using their credentials
    • Can be prevented by using one-time tokens
    • Common vulnerabilities leading to CSRF attacks:
      • Lack of input validation
      • Trusting user-manipulated parameters
      • Using parameters to track session information
      • Modifying URL or form field data without user authorization

    Phishing Attack

    • A type of attack where a malicious user sends a fake email or link to trick a user into revealing sensitive information or giving access to their machine
    • Attacks are often sent through email, redirecting the user to a malicious website or opening a connection to the originator
    • Example of a phishing email: offering a fake refund from a government agency (e.g., CRA)
    • Red flags in a phishing email/UI:
      • Suspicious sender address or domain
      • Urgent or threatening tone
      • Misspelled URLs or generic greetings
      • Request for sensitive information or login credentials

    XSS (Cross-Site Scripting) Prevention

    • Untrusted data should only be placed in allowed locations, never in tags, comments, attribute names, or tag names
    • Untrusted data should be escaped in the HTML body (e.g., in div's)
    • Use application/json headers instead of text/html
    • Sanitize HTML markup using proper libraries
    • Properly use current JS frameworks

    CSRF (Cross-Site Request Forgery) Attack

    • A type of attack where a malicious user sends a link to a legitimate user, who is logged in to a website, to gain access to the website using their credentials
    • Can be prevented by using one-time tokens
    • Common vulnerabilities leading to CSRF attacks:
      • Lack of input validation
      • Trusting user-manipulated parameters
      • Using parameters to track session information
      • Modifying URL or form field data without user authorization

    Phishing Attack

    • A type of attack where a malicious user sends a fake email or link to trick a user into revealing sensitive information or giving access to their machine
    • Attacks are often sent through email, redirecting the user to a malicious website or opening a connection to the originator
    • Example of a phishing email: offering a fake refund from a government agency (e.g., CRA)
    • Red flags in a phishing email/UI:
      • Suspicious sender address or domain
      • Urgent or threatening tone
      • Misspelled URLs or generic greetings
      • Request for sensitive information or login credentials

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    Description

    This quiz covers essential security guidelines for web development, including XSS prevention and CSRF protection. Learn how to secure your web applications with these best practices.

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