A Thorough Guide on Application Security: Benefits, Risks, and Protection Mechanisms

Security was traditionally an afterthought in software development. It is becoming increasingly crucial for all aspects of app development, from design to deployment and beyond. The number of programs produced, distributed, and patched across networks continuously increases.

Let's start by learning about application security from a grassroots level.

Become a Certified Ethical Hacker!

CEH v12 - Certified Ethical Hacking CourseExplore Program
Become a Certified Ethical Hacker!

What Is Application Security?

Application security, often known as AppSec, protects application software from external threats by utilizing security software, hardware, methodologies, best practices, and processes.

Organizations require application security technologies that safeguard all of their programs, from internal to popular external apps. These solutions must address the whole development cycle and provide testing after an application has been deployed to detect possible issues. Application security mechanisms must be capable of testing web apps for potential and exploitable vulnerabilities, analyzing code, and assisting in the administration of development and safety management processes. Application security testing solutions must be simple to use and install.

To be productive, professionals use a variety of software solutions, ranging from an online word checker to tablet-based creative tools. Backend software, of course, exists to automate essential operations and processes and decrease human labor. The increasing quantity and complexity of apps make it essential to incorporate a robust security system. The software security problem ten years ago was about securing desktop apps and static webpages that were relatively harmless and easy to scale and defend. Because of outsourced development, the number of legacy programs, and in-house development that uses third-party, open-source, commercialized, and off-the-shelf software modules, the software supply chain has become considerably more complex.

Now that we understand application security on a general level let us go through some of the different categories of application security. 

What Are the Different Types of Application Security?

There are three major types covered in this article: web application security, API security, and cloud-native application security.

  • Web-App Security: A web application is a program available through the Internet and operates on a web server. The client is accessed using a web browser. Applications, by definition, must allow connections from clients across unsecured networks. This exposes them to a variety of risks. Many online apps are mission-critical and include sensitive customer data, making them an attractive target for attackers and a top concern for any cyber security program.
  • API Security: APIs with security flaws are the root of major data breaches. They have the potential to reveal sensitive data and disrupt vital corporate processes. API security flaws include insufficient authentication, unintended data disclosure, and a failure to apply rate restriction, which allows API abuse. The requirement for API security, like the necessity for web application security, has led to the creation of sophisticated equipment that can discover API vulnerabilities and protect APIs in production.
  • Cloud-Native Security: Infrastructure and environments are often built up automatically in cloud-native apps depending on declarative configuration, known as infrastructure as code (IaC). The developers are tasked with developing declarative settings and application code, which should be secure. As everything is defined during the development stage, shifting left is even more critical in cloud native setups. Traditional testing techniques can help cloud-native apps, but they are insufficient. Dedicated cloud-native security solutions are required, capable of instrumenting vessels, container clusters, and serverless operations, reporting on security concerns, and providing developers with a quick feedback loop.

Now that we have covered the different types of application security, let us go through some of the most common vulnerabilities these frameworks face.

Become a Certified Ethical Hacker!

CEH v12 - Certified Ethical Hacking CourseExplore Program
Become a Certified Ethical Hacker!

Vulnerabilities of Application Security

  • Cryptographic Failure: When data is not adequately safeguarded in transit and at rest, cryptographic failures (formerly known as "sensitive data exposure") occur. It has the potential to reveal credentials, health information, credit card details, and personal information.
  • Injection Attacks: Threat actors can use injection vulnerabilities to convey malicious information to a web application interpreter. It has the potential to assemble and execute this data on the server. SQL injection is a popular type of injection, which we already covered in our introduction for this video.
  • Outdated Components: Vulnerable and out-of-date components (formerly known as "using components with known vulnerabilities") encompass any vulnerability caused by obsolete or unsupported software. It can happen if you develop or use an application without learning about its core components and versions.
  • Authentication Failure: Identification and authentication failures (formerly known as "broken authentication") encompass any security issue involving user identities. Identity attacks and exploitation may be avoided by implementing secure session administration, authentication, and validation for all identities.

In the next section, let us cover some of the protection mechanisms employed by cybersecurity firms and third-party automated software to protect the application layer from being bombarded with SQL Injection and other attacks.

Become a Certified Ethical Hacker!

CEH v12 - Certified Ethical Hacking CourseExplore Program
Become a Certified Ethical Hacker!

Protection Against Application Security Vulnerabilities

  • Web-Application Firewall: A web application firewall (WAF) monitors and filters HTTP traffic between a web application and the World Wide Web. WAF architecture does not address all risks, but it may be used with a portfolio of security solutions to provide a comprehensive defense against diverse attack routes. WAF is a protocol layer seven protection in the open systems interconnection (OSI) paradigm that helps defend online applications against attacks such as cross-site scripting (XSS), cross-site fraud, SQL injection, and file inclusion.
  • Threat Assessment: A list of sensitive assets will help you understand the threat to your firm. Consider how a hacker can infiltrate an application, if existing security protections are in place, and whether additional tools or defense capabilities are required. Keep your security expectations in check. Nothing is indecipherable, even with the most rigorous security measures.
  • Privilege Management: Limiting privileges is vital for mission-critical and sensitive systems. The Least Privilege principle states that access to programs and data should be limited to those who require them. Hackers may compromise less privileged accounts and ensure they do not acquire access to susceptible systems.
Grab the opportunity to be a part of the MIT CSAIL Professional Programs community and interact with your peers. Attend masterclasses from MIT faculty in our PGP in Cyber Security and expedite your cybersecurity career in no time!


This tutorial on application security covered the basics of application security, its risks, and protection mechanisms. We also learned about the different application security types and some of the vulnerabilities faced by today’s systems.

Simplilearn offers a Cyber Security Expert Certification covering all the basics of cybersecurity and complex topics like ethical hacking and cloud security. It features individual CISSP and CompTIA Security+ courses to provide a well-rounded lesson on all things cyber security. With separate certificates for each course, completing this program assures you of a solid foundation as you enter the field of cybersecurity as a beginner.

Do you have any doubts about application security? Please let us know your queries in the comment box below, and we will get back to you as soon as possible.

About the Author

Baivab Kumar JenaBaivab Kumar Jena

Baivab Kumar Jena is a computer science engineering graduate, he is well versed in multiple coding languages such as C/C++, Java, and Python.

View More
  • Disclaimer
  • PMP, PMI, PMBOK, CAPM, PgMP, PfMP, ACP, PBA, RMP, SP, and OPM3 are registered marks of the Project Management Institute, Inc.