IQSOFT - John Brice Oktatóközpont
ENGEDÉLYEZETT KÉPZÉSEK

C# and Web application security master course

Tanfolyam célja

As a developer, your duty is to write bulletproof code. However...

What if we told you that despite all of your efforts, the code you have been writing your entire career is full of weaknesses you never knew existed? What if, as you are reading this, hackers were trying to break into your code? How likely would they be to succeed?

This combined course will change the way you look at code. A hands-on training during which we will teach you all of the attackers’ tricks and how to mitigate them, leaving you with no other feeling than the desire to know more.

It is your choice to be ahead of the pack, and be seen as a game changer in the fight against cybercrime.

  •     Understand basic concepts of security, IT security and secure coding
  •     Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  •     Learn about XML security
  •     Learn how to set up and operate the deployment environment securely
  •     Learn client-side vulnerabilities and secure coding practices
  •     Have a practical understanding of cryptography
  •     Learn to use various security features of the .NET development environment
  •     Understand essential security protocols
  •     Understand some recent attacks against cryptosystems
  •     Understand security concepts of Web services
  •     Learn about JSON security
  •     Get information about some recent vulnerabilities in .NET and ASP.NET
  •     Learn about typical coding mistakes and how to avoid them
  •     Learn about denial of service attacks and protections
  •     Understand security testing approaches and methodologies
  •     Get practical knowledge in using security testing techniques and tools
  •     Get sources and further readings on secure coding practices
Tematika
  •     IT security and secure coding
  •     Web application security (OWASP Top Ten 2017)
  •     Client-side security
  •     Practical cryptography
  •     Cryptography in .NET
  •     .NET security architecture and services
  •     Desktop application security
  •     Data access security in .NET
  •     Security protocols
  •     Security of Web services
  •     ASP.NET security architecture
  •     Common coding errors and vulnerabilities
  •     Denial of service
  •     Security testing
  •     Security testing techniques
  •     Principles of security and secure coding
  •     Knowledge sources

1. IT security and secure coding

  •         Nature of security
  •         What is risk?
  •         IT security vs. secure coding
  •         From vulnerabilities to botnets and cybercrime
    •             Nature of security flaws
    •             Reasons of difficulty
    •             From an infected computer to targeted attacks
  •         Classification of security flaws
  •             Landwehr’s taxonomy
  •             The Seven Pernicious Kingdoms
  •             OWASP Top Ten 2017

    Web application security (OWASP Top Ten 2017)

  •         A1 - Injection
  •             Injection principles
  •             SQL injection
    •                 Exercise – SQL Injection
    •                 Exercise – SQL injection
    •                 Typical SQL Injection attack methods
    •                 Blind and time-based SQL injection
    •                 SQL injection protection methods
  •             Other injection flaws
    •                 Command injection
    •                 Command injection exercise – starting Netcat
    •                 Case study – ImageMagick
    •                 Cookie injection / HTTP parameter pollution
    •                 Exercise – Value shadowing
  •         A2 - Broken authentication
    •             Session handling threats
    •             Session fixation
    •             Exercise – Session fixation
    •             Session handling best practices
    •             Setting cookie attributes – best practices
  •         A3 - Sensitive data exposure
    •             Sensitive data exposure
    •             Transport layer security
  •         A4 - XML external entity (XXE)
    •             XML Entity introduction
    •             XML bomb
    •             Exercise – XML bomb
    •             XML external entity attack (XXE) – resource inclusion
    •             XML external entity attack – URL invocation
    •             XML external entity attack – parameter entities
    •             Exercise – XXE attack
    •             Preventing entity-related attacks
    •             Case study – XXE in Google Toolbar
  •         A5 - Broken access control
    •             Typical access control weaknesses
    •             Insecure direct object reference (IDOR)
    •             Exercise – Insecure direct object reference
    •             Protection against IDOR
    •             Case study – Facebook Notes
    •             Failure to restrict URL access
  •         A6 - Security misconfiguration
    •             Configuration management
    •             Hardening
    •             Patch management
    •             ASP.NET components and environment overview
    •             Recommended settings
    •             Insecure file uploads
    •             Exercise – Uploading executable files
    •             Filtering file uploads – validation and configuration

 2. Web application security (OWASP Top Ten 2017)

  •         A7 - Cross-Site Scripting (XSS)
    •             Persistent XSS
    •             Reflected XSS
    •             DOM-based XSS
    •             Exercise – Cross Site Scripting
    •             Exploitation: CSS injection
    •             Exploitation: injecting the tag
    •             Exercise – HTML injection with base tag
    •             XSS prevention
    •             Output encoding API in C#
    •             XSS protection in ASP.NET – validateRequest
    •             Web Protection Library (WPL)
  •         A8 - Insecure deserialization
    •             Deserialization basics
    •             Security challenges of deserialization
    •             Deserialization in .NET
    •             From deserialization to code execution
    •             POP payload targeting MulticastDelegate (C#)
    •             Real-world .NET examples of deserialization vulnerabilities
    •             Issues with deserialization – JSON
    •             Case study – Windows PowerShell RCE
      •                 CVE-2017-8565 – Windows PowerShell RCE
      •                 Example XML triggering the RCE
  •         A9 - Using components with known vulnerabilities
    •             Vulnerability attributes
    •             Common Vulnerability Scoring System – CVSS
  •         A10 - Insufficient logging and monitoring
    •             Detection and response
    •             Logging and log analysis
    •             Intrusion detection systems and Web application firewalls

    Client-side security

  •         JavaScript security
  •         Same Origin Policy
  •         Cross Origin Resource Sharing (CORS)
  •         Exercise – Client-side authentication
  •         Client-side authentication and password management
  •         Protecting JavaScript code
  •         Exercise – JavaScript obfuscation
  •         Clickjacking
    •             Clickjacking
    •             Exercise – Do you Like me?
    •             Protection against Clickjacking
    •             Anti frame-busting – dismissing protection scripts
    •             Protection against busting frame busting
  •         AJAX security
    •             XSS in AJAX
    •             Script injection attack in AJAX
    •             Exercise – XSS in AJAX
    •             XSS protection in Ajax
    •             Exercise CSRF in AJAX – JavaScript hijacking
    •             CSRF protection in AJAX
  •         HTML5 security
    •             New XSS possibilities in HTML5
    •             HTML5 clickjacking attack – text field injection
    •             HTML5 clickjacking – content extraction
    •             Form tampering
    •             Exercise – Form tampering
    •             Cross-origin requests
    •             HTML proxy with cross-origin request
    •             Exercise – Client side include

    Practical cryptography

  •         Cryptosystems
    •             Elements of a cryptosystem
  •         Symmetric-key cryptography
    •             Providing confidentiality with symmetric cryptography
    •             Symmetric encryption algorithms
    •             Block ciphers – modes of operation
  •         Other cryptographic algorithms
    •             Hash or message digest
    •             Hash algorithms
    •             SHAttered
    •             Message Authentication Code (MAC)
    •             Providing integrity and authenticity with a symmetric key
    •             Random numbers and cryptography
    •             Cryptographically-strong PRNGs
    •             Hardware-based TRNGs
  •         Asymmetric (public-key) cryptography
    •             Providing confidentiality with public-key encryption
    •             Rule of thumb – possession of private key
    •             The RSA algorithm
    •                 Introduction to RSA algorithm
    •                 Encrypting with RSA
    •                 Combining symmetric and asymmetric algorithms
    •                 Digital signing with RSA
  •         Public Key Infrastructure (PKI)
    •             Man-in-the-Middle (MitM) attack
    •             Digital certificates against MitM attack
    •             Certificate Authorities in Public Key Infrastructure
    •             X.509 digital certificate

 3. Cryptography in .NET

  •         .NET cryptographic architecture
  •         Hashing
  •         Using random numbers
  •         Encrypting and decrypting (symmetric)
  •         Exercise – using .NET cryptographic classes

        Asymmetric algorithms in .NET
    .NET security architecture and services

  •         .NET architecture
  •         Code Access Security
    •             Full and partial trust
    •             Evidence classes
    •             Permissions
    •             Code access permission classes
    •             Deriving permissions from evidence
    •             Defining custom permissions
    •             .NET runtime permission checking
    •             The Stack Walk
    •             Effects of Assert()
    •             Class and method-level declarative permission
    •             Imperative (programmatic) permission checking
    •             Exercise – sandboxing .NET code
    •             Using transparency attributes
    •             Allow partially trusted callers
    •             Exercise – using transparency attributes
  •         Role-based security
    •             Principal-based authorization
    •             Exercise – adding role-based authorization
    •             Impersonation

    Desktop application security

  •         Windows Forms
    •             Introduction to Windows Forms
    •             Using TextBoxes to ask for passwords
    •             Best practices for password input
    •             Exercise – TextBoxPassword
    •             Other security considerations
    •             CVE-2015-1673 – user-assisted arbitrary code execution
  •         Windows Presentation Foundation
    •             Introduction to WPF
    •             Extensible Application Markup Language (XAML)
    •             WPF deployment models
  •         Common security issues with desktop .NET applications
    •             Resource hijacking in WPF applications
    •             Exercise – LibHijack
  •         Protecting .NET code
    •             Protecting .NET code
    •             Strong naming
    •             Exercise – Using strong names
    •             Authenticode
    •             Exercise – Using Authenticode

    Data access security in .NET

  •         Working with databases
  •         ADO.NET
    •             Prepared statements in ADO.NET
    •             Securing connection strings
  •         Entity Framework
    •             Entity Framework security
    •             Object exposure with Entity Framework

    Security protocols

  •         Secure network protocols
  •         Specific vs. general solutions
  •         SSL/TLS protocols
    •             Security services
    •             SSL/TLS handshake
  •         Protocol-level vulnerabilities
    •             BEAST
    •             FREAK
    •             FREAK – attack against SSL/TLS
    •             Logjam attack
  •         Padding oracle attacks
    •             Adaptive chosen-ciphertext attacks
    •             Padding oracle attack
    •             CBC decryption
    •             Padding oracle example
    •             Lucky Thirteen
    •             POODLE

    Security of Web services

  •         SOAP security
    •             SOAP - Simple Object Access Protocol
    •             Message level security
  •         Security of RESTful web services
    •             Authentication with REST
    •             Authorization with REST
    •             Vulnerabilities in connection with REST
  •         Windows Communication Foundation security
  •         Introduction to WCF
  •         WCF architecture and security considerations
    •             WCF architecture
    •             Security considerations for the hosting environment
    •             WCF security terminology
    •             Transport layer security – client authentication
    •             Authorization options
  •         Common security issues with WCF applications
  •         Notable vulnerabilities in the WCF framework
    •             Denial of service via MSMQ
    •             CVE-2013-1337 – Authentication Bypass Vulnerability
    •             CVE-2014-4149 – Arbitrary Code Execution
  •         XML security
    •             Introduction
    •             XML parsing
    •             XML injection
    •                 (Ab)using CDATA to store XSS payload in XML
    •                 Exercise – XML injection
  •         JSON security
    •             JSON parsing
    •             Embedding JSON server-side
    •             JSON injection
    •             JSON hijacking
    •             Case study – XSS via spoofed JSON element

 4. ASP.NET security architecture

  •         ASP.NET features
  •         Authentication and identity management
    •             Authentication on IIS
    •             Authentication in ASP.NET – forms authentication
    •             Exercise – Forms authentication with Membership
  •         Authorization
    •             URL authorization
    •             File authorization – Access Control List (ACL)
    •             Role Manager
    •             Roles Manager API
  •         Features and vulnerabilities
    •             Custom protected configuration providers
    •             Postback validation
    •             Viewstate protection
    •             Event validation
    •             Accessing disabled and hidden controls
    •             Control sequence attacks
    •             Case study – Forms Authentication Bypass
    •                 NULL byte termination vulnerability
    •                 The Forms Authentication Bypass vulnerability in the code
    •                 Exploiting the Forms Authentication Bypass

    Common coding errors and vulnerabilities

  •         Input validation
    •             Input validation concepts
    •             Integer problems
      •                 Representation of negative integers
      •                 Integer overflow
      •                 Exercise IntOverflow
      •                 What is the value of Math.Abs(int.MinValue)?
      •                 Integer problem – best practices
      •                 Case study – Integer overflow in .NET
    •             Path traversal vulnerability
      •                 Path traversal mitigation
      •                 Case study – Insufficient URL validation in LastPass
    •             Unvalidated redirects and forwards
    •             Unsafe native calls
      •                 Unsafe native calls
      •                 Exercise – Unsafe unmanaged code
    •             Unsafe reflection
      •                 Implementation of a command dispatcher
      •                 Unsafe reflection – spot the bug!
      •                 Mitigation of unsafe reflection
    •             Log forging
      •                 Some other typical problems with log files
  •         Improper use of security features
    •             Typical problems related to the use of security features
    •             Insecure randomness
      •                 Weak PRNGs in .NET
    •             Password management
      •                 Exercise – Weakness of hashed passwords
      •                 Password management and storage
      •                 Brute forcing
      •                 Special purpose hash algorithms for password storage
      •                 Argon2 and PBKDF2 implementations in .NET
      •                 bcrypt and scrypt implementations in .NET
      •                 Case study – the Ashley Madison data breach
      •                 Typical mistakes in password management
      •                 Exercise – Hard coded passwords
    •             Insufficient anti-automation
      •                 Captcha
      •                 Captcha weaknesses
    •             Accessibility modifiers
      •                 Accessing private fields with reflection in .NET
      •                 Exercise Reflection – Accessing private fields with reflection

    Denial of service

  •         DoS introduction
  •         Asymmetric DoS
  •         Case study – Denial-of-service against ICDs
    •             Evaluation of St. Jude Medical pacemakers / ICDs
    •             Denial-of-service: battery drain
    •             SSL/TLS renegotiation DoS
  •         Regular expression DoS (ReDoS)
    •             Exercise ReDoS
    •             ReDoS mitigation
    •             Case Study – ReDos in Stack Exchange
  •         Hashtable collision attack
    •             Using hashtables to store inputs
    •             Hashtable collision
    •             Hashtable collision in ASP.NET

 5. Common coding errors and vulnerabilities

  •         Improper error and exception handling
    •             Typical problems with error and exception handling
    •             Empty catch block
    •             Overly broad catch
    •             Using multi-catch
    •             Catching NullReferenceException
    •             Exception handling – spot the bug!
    •             Exercise – Error handling
    •             Exercise – Information leakage through error reporting
  •         Time and state problems
    •             Concurrency and threading
    •             Concurrency in .NET
    •             Omitted synchronization – spot the bug!
    •             Exercise – Omitted synchronization
    •             Incorrect granularity – spot the bug!
    •             Exercise – Incorrect granularity
    •             Deadlocks
    •             Avoiding deadlocks
    •             Exercise – Avoiding deadlocks
    •             Lock statement
    •             Serialization errors (TOCTTOU)
    •             TOCTTOU example
    •             Exercise – Race condition
    •             Exercise – Exploiting the race condition
  •         Code quality problems
    •             Dangers arising from poor code quality
    •             Poor code quality – spot the bug!
    •             Unreleased resources
    •             Misspelled method – spot the bug!
    •             Exercise – Misspelled method
    •             Serialization – spot the bug!
    •             Exercise – Serializable sensitive
    •             Private arrays – spot the bug!
    •             Private arrays – typed field returned from a public method
    •             Class not sealed – object hijacking
    •             Exercise – Object hijacking
    •             Immutable string – spot the bug!
    •             Exercise – Immutable strings
    •             Using SecureString
    •             Exercise – Using SecureString

    Security testing

  •         Functional testing vs. security testing
  •         Security vulnerabilities
  •         Prioritization – risk analysis
  •         Security in the SDLC
  •         Security assessments in various SDLC phases
  •         Security testing methodology
    •             Steps of test planning (risk analysis)
    •             Scoping and information gathering
      •                 Stakeholders
      •                 Assets
      •                 Security objectives for testing
    •             Threat modeling
      •                 Attacker profiles
      •                 Threat modeling
      •                 Threat modeling based on attack trees
      •                 Threat modeling based on misuse/abuse cases
      •                 Misuse/abuse cases – a simple example
      •                 SDL threat modeling
      •                 The STRIDE threat categories
      •                 Diagramming – elements of a DFD
      •                 Data flow diagram – example
      •                 Threat enumeration – mapping STRIDE to DFD elements
      •                 Risk analysis – classification of threats
      •                 The DREAD risk assessment model
    •             Testing steps
      •                 Deriving test cases
      •                 Accomplishing the tests
      •                 Processing test results
      •                 Mitigation concepts
      •                 Standard mitigation techniques of MS SDL
      •                 Communicating the results
      •                 Review phase

    Security testing techniques

  •         General testing approaches
  •         Source code review
    •             Code review for software security
    •             Taint analysis
    •             Heuristic-based
    •             Static code analysis
      •                 Static code analysis
      •                 Exercise – Using static code analysis tools
  •         Testing the implementation
    •             Dynamic security testing
    •             Manual vs. automated security testing
    •             Penetration testing
    •             Stress tests
    •             Proxy servers and sniffers
      •                 Testing with proxies and sniffers
      •                 Packet analyzers and proxies
      •                 Exercise – Testing with proxy
    •             Web vulnerability scanners
      •                 Exercise – Using a vulnerability scanner
      •                 SQL injection tools
      •                 Exercise – Using SQL injection tools

    Principles of security and secure coding

  •         Matt Bishop’s principles of robust programming
  •         The security principles of Saltzer and Schroeder

    Knowledge sources

  •         Secure coding sources – a starter kit
  •         Vulnerability databases
  •         .NET secure coding guidelines at MSDN
  •         .NET secure coding cheat sheets

        Recommended books – .NET and ASP.NET

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Advanced C# and Web application development

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