Introductory Cyber Security | Module 4: Application Security by Prakhar Chauhan | Learn Smarter
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Module 4: Application Security

Application security is a comprehensive examination of software vulnerabilities and their mitigations, including risks related to coding errors, web application vulnerabilities, and core internet protocols. The chapter covers critical topics, such as buffer overflows, XSS attacks, and secure cookie management, alongside overarching strategies for ensuring both client-side and server-side security. By understanding these vulnerabilities and implementing recommended practices, individuals can significantly improve the protection of applications against malicious exploits.

Sections

  • 1

    Basic Application Vulnerabilities And Their Mitigations

    This section explores fundamental software vulnerabilities and their mitigation strategies, focusing on buffer overflow, integer overflow, and format string vulnerabilities.

    Learning Practice

  • 1.1

    Buffer Overflow

    Buffer overflow vulnerabilities occur when a program writes data beyond a buffer's boundaries, potentially leading to code execution or application crashes.

    Learning Practice

  • 1.2

    Integer Overflow

    Integer overflow occurs when arithmetic operations exceed the limits of a data type, potentially leading to unexpected behaviors and vulnerabilities.

    Learning Practice

  • 1.3

    Format String Vulnerability

    Format string vulnerabilities arise when unsanitized user input is used as a format string in functions, leading to dangerous exploits.

    Learning Practice

  • 2

    Web Client Security

    This section explores client-side web security, focusing on protecting users against threats such as cross-origin issues, JavaScript vulnerabilities, and cookie management.

    Learning Practice

  • 2.1

    Same-Origin Principle (Sop)

    The Same-Origin Principle (SOP) is a vital web security policy that restricts how scripts from different origins can interact with each other.

    Learning Practice

  • 2.2

    Dom (Document Object Model)

    The Document Object Model (DOM) is crucial for creating interactive web pages, serving as a tree-like structure that web browsers use to represent and manipulate HTML or XML documents dynamically.

    Learning Practice

  • 2.3

    Javascript Vulnerabilities

    JavaScript vulnerabilities are critical security risks that arise from improper handling of client-side script execution.

    Learning Practice

  • 2.4

    Cookies And Cookie Attributes Secure, Httponly

    This section discusses the functionality and secure management of cookies in web applications, emphasizing the Secure and HttpOnly attributes that enhance protection against common web security threats.

    Learning Practice

  • 2.5

    Concept Of Session And Session Id

    This section explores the concepts of sessions and session IDs within web applications, emphasizing their importance for maintaining user state across stateless HTTP protocols.

    Learning Practice

  • 2.6

    Session Hijacking Vulnerability

    Session hijacking is an attack where an attacker gains unauthorized access to a user's active session by stealing their session ID.

    Learning Practice

  • 2.7

    Http Vs. Https And Ssl/tls And Version Issues

    This section discusses the differences between HTTP and HTTPS, focusing on the role of SSL/TLS in securing web communications and addressing protocol versioning concerns.

    Learning Practice

  • 3

    Web Server Security: Common Attacks And Mitigation Techniques

    This section covers common web server vulnerabilities, the mechanisms behind attacks, and effective mitigation strategies.

    Learning Practice

  • 3.1

    Cross-Site Scripting (Xss)

    Cross-Site Scripting (XSS) is a code injection vulnerability that allows attackers to inject malicious scripts into web pages viewed by users, exploiting the trust of their web browsers.

    Learning Practice

  • 3.2

    Cross-Site Request Forgery (Csrf)

    Cross-Site Request Forgery (CSRF) tricks users' browsers into making unwanted requests to web applications where they are authenticated.

    Learning Practice

  • 3.3

    Sql Injection

    SQL Injection is a code injection vulnerability that allows attackers to manipulate SQL queries to their advantage, potentially leading to data breaches and unauthorized access.

    Learning Practice

  • 3.4

    Command Injection

    Command injection is a security vulnerability where attackers can execute arbitrary commands on the host operating system via user input.

    Learning Practice

  • 4

    Vulnerabilities In Core Internet Protocols And Suggested Remedies

    This section addresses the inherent vulnerabilities in core internet protocols and explores suggested remedies using advanced security extensions.

    Learning Practice

  • 4.1

    Vulnerabilities In Dns (Domain Name System)

    This section discusses the inherent vulnerabilities in the Domain Name System (DNS) and suggests remedies to enhance its security.

    Learning Practice

  • 4.2

    Vulnerabilities In Routing Protocols (E.g., Bgp)

    The section covers inherent vulnerabilities in routing protocols, particularly BGP, highlighting issues like route hijacking and lack of origin validation.

    Learning Practice

  • 4.3

    Vulnerabilities In Ip Protocols (Especially Ipv4) And Remedies

    This section addresses the significant vulnerabilities inherent in the IPv4 protocol and outlines the remedies provided by IPSec.

    Learning Practice

References

Untitled document (21).pdf

Class Notes

Memorization

What we have learnt

  • Understanding of fundamenta...
  • Importance of secure cookie...
  • Overview of core internet p...

Final Test

Revision Tests