Web application security master course

CL-WSM
5 nap
350 000 Ft + ÁFA
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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 advanced 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 client-side vulnerabilities and secure coding practices
  •     Have a practical understanding of cryptography
  •     Understand the requirements of secure communication
  •     Understand essential security protocols
  •     Understand some recent attacks against cryptosystems
  •     Understand security concepts of Web services
  •     Learn about typical coding mistakes and how to avoid them
  •     Get information about some recent vulnerabilities in the Java framework
  •     Learn about denial of service attacks and protections
  •     Learn about JSON security
  •     Understand security testing approaches and methodologies
  •     Get practical knowledge in using security testing techniques and tools
  •     Learn how to set up and operate the deployment environment securely
  •     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
  •     Requirements of secure communication
  •     Practical cryptography
  •     Security protocols
  •     Security of Web services
  •     Common coding errors and vulnerabilities
  •     Denial of service
  •     XML security
  •     JSON security
  •     Security testing
  •     Security testing techniques
  •     Deployment environment
  •     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
      •                 Case study – ImageMagick
  •         A2 - Broken authentication
    •             Session handling threats
    •             Session handling best practices
    •             Session handling in Java
    •             Setting cookie attributes – best practices
  •         A3 - Sensitive data exposure
    •             Sensitive data exposure
    •             Transport layer security
      •                 Enforcing HTTPS
  •         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
    •             Exercise – Authorization bypass
  •         A6 - Security misconfiguration
    •             Security misconfiguration
    •             Configuring the environment
    •             Insecure file uploads
    •             Exercise – Uploading executable files
    •             Filtering file uploads – validation and configuration
  •         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
    •             XSS prevention tools in Java and JSP

2. Web application security (OWASP Top Ten 2017)

  •         A8 - Insecure deserialization
    •             Deserialization basics
    •             Security challenges of deserialization
    •             Deserialization in Java
    •             From deserialization to code execution
    •             POP payload targeting the Apache Commons gadget (Java)
    •             Real-world Java examples of deserialization vulnerabilities
    •             Issues with deserialization – JSON
    •             Best practices against deserialization vulnerabilities
    •             Case study – XML deserialization in Apache Struts leading to RCE
      •                 CVE-2017-9805 –Apache Struts RCE when deserializing XML
      •                 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

    Requirements of secure communication

  •         Security levels
  •         Secure acknowledgment
    •             Malicious message absorption
    •                 Feasibility of secure acknowledgment
    •                 The solution: Clearing Centers
    •             Inadvertent message loss
  •         Integrity
    •             Error detection - Inadvertent message distortion (noise)
      •                 Modeling message distortion
      •                 Error detection and correction codes
    •             Authenticity - Malicious message manipulation
      •                 Modeling message manipulation
      •                 Practical integrity protection (detection)
    •             Non-repudiation
      •                 Non-repudiation
    •             Summary
      •                 Detecting integrity violation
  •         Confidentiality
    •             Model of encrypted communication
    •             Encryption methods in practice
    •             Strength of encryption algorithms
  •         Remote identification
    •             Requirements of remote identification
  •         Anonymity and traffic analysis
    •             Model of anonymous communication
    •             Traffic analysis
    •             Theoretically strong protection against traffic analysis
    •             Practical protection against traffic analysis
  •         Summary
    •             Relationship between the requirements

    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

3. Practical cryptography

  •         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
      •                 Digital signing with RSA
      •                 Blind signature
  •         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
    •             Certificate Revocation Lists (CRLs)
    •             Online Certificate Status Protocol (OCSP)
  •         Web of Trust (WoT)
    •             Web of Trust (WoT) – introduction
    •             Challenges of Web of Trust

    Security protocols

  •         Secure network protocols
  •         Specific vs. general solutions
  •         IPSEC protocol family
    •             IPSEC standards
    •             Security Association (SA)
    •             Message formats
    •             AH packet structure
    •             ESP packet structure
    •             Protected channels
    •             More complex set-ups
    •             Traffic control
    •             SA structure
    •             Key management
  •         SSL/TLS protocols
    •             Security services
    •             SSL/TLS handshake
  •         Protocol-level vulnerabilities
    •             BEAST
  •         Padding oracle attacks
    •             Adaptive chosen-ciphertext attacks
    •             Padding oracle attack
    •             CBC decryption
    •             Padding oracle example
    •             POODLE

    Security of Web services

  •         SOAP security
    •             SOAP - Simple Object Access Protocol
    •             Security of SOAP messages - two approaches
    •             Transport layer security
    •             Message level security
  •         Security of RESTful web services
    •             Authentication with REST
    •             Authorization with REST
    •             Vulnerabilities in connection with REST

    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(Integer.MIN_VALUE)?
      •                 Integer problem – best practices
    •             Path traversal vulnerability
      •                 Path traversal mitigation
    •             Unvalidated redirects and forwards
    •             Log forging
      •                 Some other typical problems with log files

    Denial of service

  •         DoS introduction
  •         Asymmetric DoS
  •         SSL/TLS renegotiation DoS
  •         Asymmetric DOS with JSON deserialization
  •         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 Java

4. XML security

  •         Introduction
  •         XML parsing
  •         XML injection
    •             (Ab)using CDATA to store XSS payload in XML
    •             Exercise – XML injection
  •         XML Signature
    •             XML Signature introduction
    •             XML Signature structure
    •             Hash collision with XML Digital Signature
    •             XML canonicalization
    •             Signing XML documents – spot the bug!
    •             XML Signature Wrapping (XSW) attack
    •             XML Signature Wrapping – countermeasures

    JSON security

  •         JSON parsing
  •         Embedding JSON server-side
  •         JSON injection
  •         JSON hijacking
  •         Case study – XSS via spoofed JSON element

    Common coding errors and vulnerabilities

  •         Improper use of security features
    •             Typical problems related to the use of security features
    •             Insecure randomness
      •                 Weak PRNGs in Java
      •                 Exercise RandomTest
      •                 Using random numbers in Java – spot the bug!
    •             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 Java
      •                 bcrypt and scrypt implementations in Java
      •                 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 Java
      •                 Exercise Reflection – Accessing private fields with reflection
    •             Exercise ScademyPay – Integrity protection weakness
  •         Improper error and exception handling
    •             Typical problems with error and exception handling
    •             Empty catch block
    •             Overly broad throws
    •             Overly broad catch
    •             Using multi-catch
    •             Returning from finally block – spot the bug!
    •             Catching NullPointerException
    •             Exception handling – spot the bug!
    •             Exercise ScademyPay – Error handling
    •             Exercise – Information leakage through error reporting
  •         Time and state problems
    •             Time and state related problems
    •             Concurrency – spot the bug!
    •             Calling Thread.run()
    •             Race condition in servlets – spot the bug!
    •             Race condition – spot the bug!
    •             ArrayList vs Vector
  •         Code quality problems
    •             Dangers arising from poor code quality
    •             Poor code quality – spot the bug!
    •             Unreleased resources
    •             Private arrays – spot the bug!
    •             Private arrays – typed field returned from a public method
    •             Exercise Object Hijack
    •             Public method without final – object hijacking
    •             Immutable String – spot the bug!
    •             Exercise Immutable Strings
    •             Immutability and security
    •             Serialization – spot the bug!
    •             Exercise Serializable Sensitive
    •             Case study – The double bug in Java
      •                 A generic Denial of Service attack against the Java environment
      •                 The “2.2250738585072012e-308 bug”
      •                 The double bug in Tomcat
      •                 The vulnerable code of DoubleValue() in FloatingDecimal.java
      •                 Triggering the infinite loop
      •                 Exercise Double Bug
    •             Problem with inner classes
      •                 Inner classes – spot the bug!
      •                 Problem with inner classes
      •                 The decompiled class file containing an inner class
      •                 Exercise Inner Class

5. 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
      •                 Exercise – Identifying assets
      •                 Security objectives for testing
      •                 Exercise – Defining security objectives
    •             Threat modeling
      •                 Attacker profiles
      •                 Exercise – Defining attacker profiles
      •                 Threat modeling
      •                 Threat modeling based on attack trees
      •                 Exercise – Craft an attack tree
      •                 Threat modeling based on misuse/abuse cases
      •                 Misuse/abuse cases – a simple example
      •                 Exercise – Craft a misuse case
      •                 SDL threat modeling
      •                 The STRIDE threat categories
      •                 Diagramming – elements of a DFD
      •                 Data flow diagram – example
      •                 Threat enumeration – mapping STRIDE to DFD elements
      •                 Exercise – Identify threats based on DFD
      •                 Risk analysis – classification of threats
      •                 The DREAD risk assessment model
      •                 Exercise – Risk analysis
    •             Testing steps
      •                 Deriving test cases
      •                 Accomplishing the tests
      •                 Processing test results
      •                 Mitigation concepts
      •                 Standard mitigation techniques of MS SDL
      •                 Review phase

    Security testing techniques

  •         General testing approaches
  •         Design review
    •             Assessment of security requirements
    •             Identifying security-critical aspects – hotspots
  •         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

    Deployment environment

  •         Configuration management
  •         Hardening
  •         Patch management
  •         Case study - Heartbleed
    •             TLS Heartbeat Extension
    •             Heartbleed – information leakage in OpenSSL
  •         Case study - Shellshock
    •             Shellshock – basics of using functions in bash
    •             Shellshock – vulnerability in bash
    •             Exercise - Shellshock
    •             Shellshock fix and counterattacks
    •             Exercise – Command override with environment variables

    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
  •         Java secure coding sources
  •         Recommended books – Java

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