Web application security in Java and C#

CYDJvCsWeb4d
4 days
On-site or online
Hands-on
C#
Java
Web
Developer
labs

33 Labs

case_study

14 Case Studies

Audience

Java and C# developers working on Web applications

Preparedness

General Java, C# and Web development

Standards and references

OWASP, SEI CERT, CWE and Fortify Taxonomy

Group size

12 participants

Outline

  • Cyber security basics
  • The OWASP Top Ten 2021
  • Wrap up

What you'll have learned

  • Getting familiar with essential cyber security concepts
  • Understanding how cryptography supports security
  • Learning how to use cryptographic APIs correctly in Java and C#
  • Understanding Web application security issues
  • Detailed analysis of the OWASP Top Ten elements
  • Putting Web application security in the context of Java and C#
  • Going beyond the low hanging fruits
  • Input validation approaches and principles
  • Managing vulnerabilities in third party components

Description

Your application written in Java and C# works as intended, so you are done, right? But did you consider feeding in incorrect values? 16Gbs of data? A null? An apostrophe? Negative numbers, or specifically -1 or -2^31? Because that’s what the bad guys will do – and the list is far from complete.

Handling security needs a healthy level of paranoia, and this is what this course provides: a strong emotional engagement by lots of hands-on labs and stories from real life, all to substantially improve code hygiene. Mistakes, consequences, and best practices are our blood, sweat and tears.

The curriculum goes through the common Web application security issues following the OWASP Top Ten but goes far beyond it both in coverage and the details.All this is put in the context of the discussed programming languages, and extended by core programming issues, discussing security pitfalls of the used frameworks.

So that you are prepared for the forces of the dark side.

So that nothing unexpected happens.

Nothing.

They said about us

Protect your data, not your code

The class did not only discuss the whole idea of security but is also helpful in planning the whole system together with how people would create applications from scratch. Pretty much useful since a lot of developers who start a project do not focus on security in the architecture phase but just specifications. Very useful in the long run.

Employee at a Global Insurance Group , May, 2019

Manila, The Philippines

Table of contents

  • Cyber security basics
  • The OWASP Top Ten 2021
    • A01 – Broken Access Control
      • Access control basics
      • Missing or improper authorization
      • Failure to restrict URL access
      • Confused deputy
        • Insecure direct object reference (IDOR)
        • Path traversal
        • Lab – Insecure Direct Object Reference
        • Path traversal best practices
        • Authorization bypass through user-controlled keys
        • Case study – Authorization bypass on Facebook
        • Lab – Horizontal authorization
        • Reflected File Download (RFD)
      • File upload
        • Unrestricted file upload
        • Good practices
        • Lab – Unrestricted file upload
      • Open redirects and forwards
        • Case study – Unvalidated redirect at Epic Games
        • Open redirects and forwards – best practices
      • Cross-site Request Forgery (CSRF)
        • Lab – Cross-site Request Forgery
        • CSRF best practices
        • CSRF defense in depth
        • Lab – CSRF protection with tokens
    • A02 – Cryptographic Failures
      • Information exposure
        • Exposure through extracted data and aggregation
        • Case study – Strava data exposure
        • Privacy violation
          • Privacy essentials
          • Related standards, regulations and laws in brief
          • Privacy violation and best practices
        • System information leakage
          • Leaking system information
          • Exposure through debug information
          • Exposure through files and directories
        • Information leakage through side channels
          • Exposure through side channels
          • Side channels and covert channels
        • Information exposure best practices
      • Cryptography for developers
        • Cryptography basics
        • Java Cryptographic Architecture (JCA) in brief
        • Crypto APIs in C#
        • Elementary algorithms
          • Random number generation
            • Pseudo random number generators (PRNGs)
            • Cryptographically strong PRNGs
            • Weak and strong PRNGs in Java
            • Weak and strong PRNGs in C#
            • Using random numbers in C#
            • Lab – Using random numbers
            • Case study – Equifax credit account freeze
          • Hashing
            • Hashing basics
            • Hashing in Java
            • Hashing in C#
            • Lab – Hashing
  • The OWASP Top Ten 2021
    • A02 – Cryptographic Failures (continued)
      • Cryptography for developers
        • Confidentiality protection (continued)
          • Confidentiality protection
          • Symmetric encryption
            • Block ciphers
            • Modes of operation
            • Modes of operation and IV – best practices
            • Symmetric encryption in Java
            • Symmetric encryption in Java with streams
            • Symmetric encryption in C#
            • Symmetric encryption in C# with streams
            • ProtectedData and ProtectedMemory
            • Lab – Symmetric encryption
          • Asymmetric encryption
            • The RSA algorithm
              • Using RSA – best practices
              • RSA in Java
              • RSA in C#
          • Combining symmetric and asymmetric algorithms
    • A03 – Injection
      • Injection principles
      • Injection attacks
      • SQL injection
        • SQL injection basics
        • Lab – SQL injection
        • Attack techniques
        • Content-based blind SQL injection
        • Time-based blind SQL injection
      • SQL injection best practices
        • Input validation
        • Parameterized queries
        • Lab – Using prepared statements in C#
        • Additional considerations
        • Case study – Hacking Fortnite accounts
        • SQL injection protection and ORM
      • Parameter manipulation
        • CRLF injection
          • Log forging
          • Log forging – best practices
        • HTTP parameter manipulation
          • HTTP parameter pollution
          • Value shadowing
          • Variable shadowing in Java
          • Value shadowing in C#
      • Code injection
        • OS command injection
          • Lab – Command injection
          • OS command injection best practices
          • Using Runtime.exec() in Java
          • Using ProcessBuilder in Java
          • Avoiding command injection with the right APIs in C#
          • Lab – Command injection best practices
          • Case study – Command injection via ping
      • HTML injection – Cross-site scripting (XSS)
        • Cross-site scripting basics
        • Cross-site scripting types
          • Persistent cross-site scripting
          • Reflected cross-site scripting
          • Client-side (DOM-based) cross-site scripting
        • Lab – Stored XSS
        • Lab – Reflected XSS
        • Case study – XSS in Fortnite accounts
        • XSS protection best practices
          • Protection principles – escaping
          • XSS protection APIs in Java
          • XSS protection in JSP
          • XSS protection APIs in C#
          • Request validation in ASP.NET
          • Further XSS protection techniques in C#
          • Lab – XSS fix in C# / stored
          • Lab – XSS fix in C# / reflected
          • Client-side protection principles
          • Additional protection layers – defense in depth
  • The OWASP Top Ten 2021
    • A03 – Injection (continued)
      • Input validation
        • Input validation principles
        • Denylists and allowlists
        • What to validate – the attack surface
        • Where to validate – defense in depth
        • When to validate – validation vs transformations
        • Output sanitization
        • Encoding challenges
        • Unicode challenges
        • Lab – Encoding challenges
        • Validation with regex
        • Regular expression denial of service (ReDoS)
        • Lab – ReDoS
        • Dealing with ReDoS
        • Reflection without validation
        • Lab – Unsafe reflection
    • A04 – Insecure Design
      • The STRIDE model of threats
      • Secure design principles of Saltzer and Schroeder
      • Client-side security
        • Same Origin Policy
        • Tabnabbing
        • Lab – Reverse tabnabbing
        • Frame sandboxing
          • Cross-Frame Scripting (XFS) attacks
          • Lab – Clickjacking
          • Clickjacking beyond hijacking a click
          • Clickjacking protection best practices
          • Lab – Using CSP to prevent clickjacking
    • A05 – Security Misconfiguration
      • Configuration principles
      • Server misconfiguration
      • Java related components – best practices
        • Tomcat configuration
        • Lab – Tomcat misconfiguration
      • ASP.NET and IIS configuration best practices
        • ASP.NET configuration
        • IIS configuration
      • Cookie security
        • Cookie attributes
      • XML entities
        • DTD and the entities
        • Entity expansion
        • External Entity Attack (XXE)
          • File inclusion with external entities
          • Server-Side Request Forgery with external entities
          • Lab – External entity attack
          • Case study – XXE vulnerability in SAP Store
          • Preventing XXE in Java
          • Preventing XXE in C#
          • Lab – Prohibiting DTD
    • A06 – Vulnerable and Outdated Components
      • Using vulnerable components
      • Assessing the environment
      • Hardening
      • Untrusted functionality import
      • Vulnerability management
        • Patch management
        • Vulnerability databases
        • Lab – Finding vulnerabilities in third-party components
  • The OWASP Top Ten 2021
    • A07 – Identification and Authentication Failures
      • Authentication
        • Authentication basics
        • Multi-factor authentication
        • Time-based One Time Passwords (TOTP)
        • Authentication weaknesses
        • Spoofing on the Web
        • Case study – PayPal 2FA bypass
        • User interface best practices
      • Session management
        • Session management essentials
        • Why do we protect session IDs – Session hijacking
        • Session fixation
        • Session invalidation
        • Session ID best practices
      • Password management
        • Inbound password management
          • Storing account passwords
          • Password in transit
          • Lab – Is just hashing passwords enough?
          • Dictionary attacks and brute forcing
          • Salting
          • Adaptive hash functions for password storage
          • Lab – Using adaptive hash functions in JCA
          • Password policy
          • Case study – The Ashley Madison data breach
            • The dictionary attack
            • The ultimate crack
            • Exploitation and the lessons learned
          • Password database migration
            • (Mis)handling null passwords
    • A08 – Software and Data Integrity Failures
      • Integrity protection
      • Message Authentication Code (MAC)
        • Calculating MAC in Java
        • Calculating HMAC in C#
        • Lab – Calculating MAC
      • Digital signature
        • Digital signature with RSA
        • Elliptic Curve Cryptography
          • ECC basics
          • Digital signature with ECC
          • Lab – Digital signature with ECDSA
      • Subresource integrity
        • Importing JavaScript
        • Lab – Importing JavaScript
        • Case study – The British Airways data breach
      • Insecure deserialization
        • Serialization and deserialization challenges
        • Integrity – deserializing untrusted streams
        • Using readObject in Java
        • Integrity – deserialization best practices
        • Look ahead deserialization in Java
        • Property Oriented Programming (POP)
          • Creating payload in C#
          • Lab – Creating a POP payload
          • Lab – Using the POP payload
          • Summary – POP best practices
    • A09 – Security Logging and Monitoring Failures
      • Logging and monitoring principles
      • Insufficient logging
      • Case study – Plaintext passwords at Facebook
      • Logging best practices
      • Monitoring best practices
    • A10 Server-Side Request Forgery (SSRF)
      • Server-side Request Forgery (SSRF)
      • Case study – SSRF and the Capital One breach
  • Wrap up
    • Secure coding principles
      • Principles of robust programming by Matt Bishop
    • And now what?
      • Software security sources and further reading
      • Java resources
      • .NET and C# resources

Pricing

4 days Session Price

3000 EUR / person

  • Live, instructor led classroom training
  • Discussion and insight into the hacker’s mindset
  • Hands-on practice using case studies based on high-profile hacks and live lab exercises
Customized Course

Tailor a course to your preferences

  • Send us a brief description of your business’s training needs
  • Include your contact information
  • One of our colleagues will be in touch to schedule a free 45 minute pre-training consultation

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