OWASP Top 10 overview in Cybersecurity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the OWASP Top 10?

The OWASP Top 10 is a list of the ten most critical web application security risks, published by the Open Web Application Security Project (OWASP). It helps developers and organizations understand and fix common security issues.

beginner

Name three common risks listed in the OWASP Top 10.

Three common risks are: Injection flaws (like SQL injection), Broken Authentication, and Cross-Site Scripting (XSS). These risks can allow attackers to steal data or take control of applications.

intermediate

Why is Injection considered a critical security risk?

Injection happens when untrusted data is sent to an interpreter as part of a command or query. Attackers can trick the system to run unintended commands, leading to data theft or damage.

intermediate

What does Broken Authentication mean in the OWASP Top 10?

Broken Authentication means weaknesses in login or session management that let attackers impersonate users or steal accounts. This can happen if passwords are weak or sessions are not properly protected.

beginner

How can developers use the OWASP Top 10 to improve security?

Developers can use the OWASP Top 10 as a checklist to find and fix common security problems in their applications. It guides them to write safer code and protect users from attacks.

What organization publishes the OWASP Top 10?

A National Institute of Standards and Technology

B Internet Security Alliance

C Cybersecurity and Infrastructure Security Agency

D Open Web Application Security Project

The OWASP Top 10 is published by the Open Web Application Security Project, a nonprofit focused on improving software security.

Which of the following is an example of an Injection attack?

A Cross-Site Scripting

B Broken Authentication

C SQL Injection

D Security Misconfiguration

SQL Injection is a type of Injection attack where malicious SQL commands are inserted into queries.

Cross-Site Scripting (XSS) allows attackers to:

A Run malicious scripts in a user's browser

B Steal passwords from the server

C Bypass firewall rules

D Crash the web server

XSS lets attackers inject scripts that run in users' browsers, potentially stealing data or hijacking sessions.

Broken Authentication can lead to:

A Data encryption

B User impersonation

C Faster page loading

D Improved user interface

Broken Authentication weaknesses allow attackers to impersonate users and access their accounts.

The OWASP Top 10 is primarily intended for:

A Web application developers and security teams

B Graphic designers

C Network hardware engineers

D End users

The OWASP Top 10 helps developers and security teams understand and fix common web app security risks.

Explain what the OWASP Top 10 list is and why it is important for web security.

Think about how this list helps prevent common security problems.

Describe two common security risks from the OWASP Top 10 and how attackers exploit them.

Consider Injection and Broken Authentication as examples.

Practice

1. What is the main purpose of the OWASP Top 10 list?

easy

A. To highlight the most common web security risks

B. To provide a list of programming languages

C. To rank the fastest web browsers

D. To list popular web development frameworks

Solution

1. Step 1: Understand the OWASP Top 10 focus

   The OWASP Top 10 is a list created to identify the most frequent and critical security risks in web applications.

2. Step 2: Compare options with OWASP purpose

   Only To highlight the most common web security risks correctly states that it highlights common web security risks, while others are unrelated.

3. Final Answer:

   To highlight the most common web security risks -> Option A

4. Quick Check:

   OWASP Top 10 = Common web security risks [OK]

Hint: OWASP Top 10 = top web security risks [OK]

Common Mistakes:

• Confusing OWASP with programming tools
• Thinking it ranks browsers or frameworks
• Assuming it lists coding languages

2. Which of the following is a correct example of an OWASP Top 10 risk category?

easy

A. User Interface Design

B. Cloud Storage Optimization

C. Data Backup Scheduling

D. Cross-Site Scripting (XSS)

Solution

1. Step 1: Identify OWASP risk categories

   OWASP Top 10 includes risks like Cross-Site Scripting (XSS), Injection flaws, and Broken Authentication.

2. Step 2: Match options to known OWASP risks

   Only Cross-Site Scripting (XSS) matches a known OWASP risk category; others relate to unrelated IT topics.

3. Final Answer:

   Cross-Site Scripting (XSS) -> Option D

4. Quick Check:

   XSS is an OWASP risk category [OK]

Hint: Look for known security risk names like XSS [OK]

Common Mistakes:

• Choosing unrelated IT terms
• Confusing design or backup topics with security risks
• Not recognizing common OWASP terms

3. Consider this simplified list of OWASP Top 10 risks: Injection, Broken Authentication, Sensitive Data Exposure, XML External Entities (XXE). Which risk is NOT included in this list?

medium

A. Broken Authentication

B. Injection

C. Cross-Site Scripting (XSS)

D. Sensitive Data Exposure

Solution

1. Step 1: Review the given list of risks

   The list includes Injection, Broken Authentication, Sensitive Data Exposure, and XXE.

2. Step 2: Identify which option is missing

   Cross-Site Scripting (XSS) is a common OWASP risk but is not in the provided list.

3. Final Answer:

   Cross-Site Scripting (XSS) -> Option C

4. Quick Check:

   XSS missing from list = Cross-Site Scripting (XSS) [OK]

Hint: Check which known risk is absent from the list [OK]

Common Mistakes:

• Assuming all common risks are listed
• Confusing similar risk names
• Overlooking the missing item

4. A developer wrote this statement: "SQL Injection is not part of the OWASP Top 10." What is wrong with this statement?

medium

A. SQL Injection is a type of UI design issue

B. SQL Injection is a core OWASP Top 10 risk

C. SQL Injection only affects mobile apps

D. SQL Injection is unrelated to security

Solution

1. Step 1: Understand SQL Injection's role in OWASP

   SQL Injection is a classic example of Injection flaws, which is a top OWASP risk.

2. Step 2: Evaluate the incorrect statement

   The statement denies SQL Injection's inclusion, which is false because it is a core risk.

3. Final Answer:

   SQL Injection is a core OWASP Top 10 risk -> Option B

4. Quick Check:

   SQL Injection = OWASP risk [OK]

Hint: Injection risks always include SQL Injection [OK]

Common Mistakes:

• Thinking SQL Injection is unrelated to security
• Confusing it with UI or mobile issues
• Ignoring OWASP's Injection category

5. A company wants to reduce risks from Broken Authentication and Sensitive Data Exposure. Which two actions best address these OWASP Top 10 risks?

hard

A. Implement strong password policies and encrypt sensitive data

B. Use flashy UI designs and increase server speed

C. Disable all user logins and remove data backups

D. Ignore authentication and focus on marketing

Solution

1. Step 1: Understand the risks

   Broken Authentication means weak login controls; Sensitive Data Exposure means data is not protected well.

2. Step 2: Match actions to risks

   Strong password policies improve authentication security; encrypting data protects sensitive information.

3. Final Answer:

   Implement strong password policies and encrypt sensitive data -> Option A

4. Quick Check:

   Strong passwords + encryption = reduce these risks [OK]

Hint: Match risk with security controls like passwords and encryption [OK]

Common Mistakes:

• Choosing unrelated actions like UI design
• Thinking disabling logins is practical
• Ignoring encryption for data protection