(OWASP) Top 10 – Secure Coding Fundamentals

Web Developers

General Web Development

Writing web applications can be rather complex – reasons range from dealing with legacy technologies or under documented third-party components to sharp deadlines and code maintainability. Yet, beyond all that, what if we told you that attackers were trying to break into your code right now? How likely would they be to succeed?

This 2-day course will change the way you look at your code. We’ll teach you the common weaknesses and their consequences that can allow hackers to attack your system, and – more importantly – best practices you can apply to protect yourself. We cover typical Web vulnerabilities with a focus on how they affect web apps on the entire stack – from the base environment to modern AJAX and HTML5- based frontends. In addition, we discuss the security aspects of different platforms as well as typical programming mistakes you need to be aware of. We present the entire course through live practical exercises to keep it engaging and fun.

Writing secure code will give you a distinct edge over your competitors. It is your choice to be ahead of the pack – take a step and be 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
• Learn about typical coding mistakes and how to avoid them
• Get information about some recent vulnerabilities in different frameworks
• Get sources and further readings on secure coding practices

Day 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
• From an infected computer to targeted attacks
• TheSevenPerniciousKingdoms
• OWASP Top Ten 2017
• Web application security

Injection

Injection principles

SQLinjection

• Exercise–SQL injection
• Typical SQL Injection attack methods
• Blind and time-based SQL injection
• SQL injection protection methods
• Effect of data storage frameworks on SQL injection

Other injection flaws

• Command injection
• Case study – ImageMagick

HTTP parameter pollution

• Cookie injection/HTTP parameter pollution
• Exercise–Value shadowing
• Broken authentication
• Session handling threats
• Session handling best practices
• Session handling examples in different languages
• Setting cookie attributes – best practices

Cross site request forgery (CSRF)

• CSRF prevention
• CSRF prevention examples

XML external entity (XXE)

• XML Entity introduction
• 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

Broken access control

• Typical access control weaknesses
• Insecure direct object reference (IDOR)
• Exercise – Insecure direct object reference
• Protection against IDOR
• Case study – Facebook Notes

Cross-Site Scripting (XSS)

• Persistent XSS
• Reflected XSS
• DOM-based XSS
• Exercise–CrossSite Scripting
• XSS prevention
• XSS prevention tools

HTML5 security

• New XSS possibilities in HTML5
• HTML5 clickjacking attack – text field injection
• HTML5clickjacking – content extraction
• Form tampering
• Exercise – Form tampering
• Cross-origin requests
• HTML proxy with cross-origin request
• Exercise–Client-side include

Insecure deserialization

• Serialization and deserialization basics
• Security challenges of deserialization
• Deserialization examples
• Denial-of-service via deserialization
• From deserialization to code execution
• POP payload targeting
• Real-world deserialization vulnerabilities
• Issues with alternative object deserialization methods
• Secure deserialization with FST
• Secure deserialization with Kryo
• Issues with deserialization – JSON
• Best practices against deserialization vulnerabilities
• Case study – XML deserialization in Apache Struts leading to RCE

Using components with known vulnerabilities

• Vulnerability attributes
• Common Vulnerability Scoring System – CVSS

Insufficient logging and monitoring

• Detection and response
• Logging and log analysis
• Intrusion detection systems and Web application firewalls

Day 2

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 – weak protections
• Path traversal–best practices

Unvalidated redirects and forwards

Log forging

Some other typical problems with log files?

Improper use of security features

Typical problems related to the use of security features

• Password management
• Exercise – Weakness of hashed passwords
• Password management and storage
• 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

Accessibility modifiers

• Accessing private fields with reflection in Java
• Exercise Reflection – Accessing private fields with reflection

Exercise Scademy Pay– Integrity protection weakness

Improper error and exception handling

Typical problems with error and exception handling

• Emptycatchblock
• Overly broad throws
• Overly broad catch
• Usingmulti-catch
• Returning from finally block – spot the bug!
• CatchingExceptions
• Exception handling – spot the bug!
• Exercise ScademyPay – Error handling

Time and state problems

• Concurrency and threading
• Concurrency examples
• Omitted synchronization–spot the bug!?
• Exercise – Omitted synchronization
• Incorrect granularity– spot the bug!
• Exercise–Incorrect granularity
• Deadlocks
• Avoiding deadlocks
• Exercise–Avoiding deadlocks
• Lock statement

Code quality problems

• Dangers arising from poor code quality
• Poor code quality – spot the bug!
• Unreleased resources
• Serialization–spot the bug!
• Exercise–Serializablesensitive
• Privatearrays–spot the bug!
• Private arrays – typed field returned from a public method
• Exercise-Object hijacking
• Public method without final –object hijacking
• Immutable String–spot the bug!
• Exercise Immutable Strings
• Immutability and security

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
• .NET secure coding guidelines at MSDN
• .NET secure coding cheat sheets
• Recommended books –.NET and ASP.NET
• Recommended books – Java