Courses
1. Introduction to Blockchain and Solana
2. Setting Up Your Development Environment
3. Solana Architecture and Key Concepts
4. Creating and Managing Wallets
5. Understanding Solana Programs
6. Building Your First Solana Program
7. Deploying Programs on the Solana Network
8. Interacting with Solana Programs
9. Using Solana CLI and SDKs
10. Developing Decentralized Applications (DApps)
11. Smart Contract Security Best Practices
12. Testing and Debugging Solana Programs
13. Optimizing Performance on Solana
14. Exploring Solana Ecosystem Tools
1. Introduction to Blockchain and Ethereum
2. Setting Up Your Development Environment
3. Ethereum Architecture and Key Concepts
4. Creating and Managing Wallets
5. Understanding Smart Contracts
6. Building Your First Smart Contract
7. Deploying Smart Contracts on the Ethereum Network
8. Interacting with Smart Contracts
9. Using Ethereum CLI and SDKs
10. Developing Decentralized Applications (DApps)
11. Smart Contract Security Best Practices
12. Testing and Debugging Smart Contracts
13. Optimizing Performance on Ethereum
14. Exploring Ethereum Ecosystem Tools
1. Introduction to Blockchain and Polygon
2. Setting Up Your Development Environment
3. Polygon Architecture and Key Concepts
4. Creating and Managing Wallets
5. Understanding Smart Contracts on Polygon
6. Building Your First Smart Contract on Polygon
7. Deploying Smart Contracts on the Polygon Network
8. Interacting with Smart Contracts on Polygon
9. Using Polygon CLI and SDKs
10. Developing Decentralized Applications (DApps) on Polygon
11. Smart Contract Security Best Practices for Polygon
12. Testing and Debugging Smart Contracts on Polygon
13. Optimizing Performance on Polygon
14. Exploring Polygon Ecosystem Tools
1. Introduction to Cybersecurity
2. Report Writing for Penetration Testers
3. Information Gathering
4. Vulnerability Scanning
5. Introduction to Web Applications
6. Common Web Application Attacks
7. SQL Injection Attacks
8. Client-Side Attacks
9. Locating Public Exploits
10. Fixing Exploits
11. Antivirus Evasion
12. Password Attacks
13. Windows Privilege Escalation
14. Linux Privilege Escalation
15. Advanced Tunneling
16. The Metasploit Framework
17. Active Directory: Introduction and Enumeration
18. Attacking Active Directory Authentication
19. Lateral Movement in Active Directory
.NET Deserialization
OSWE · Chapter 7
.NET Deserialization
.NET deserialization vulnerabilities occur when an application deserializes attacker-controlled data using an unsafe binder that can instantiate arbitrary types — some of which have side effects (like running a process) purely as part of being constructed, leading directly to remote code execution.
Key concepts
- `BinaryFormatter` is considered unsafe by Microsoft itself and cannot be secured for untrusted input — it should not be used at all for that purpose.
- Known "gadget chains" (e.g. via `ObjectDataProvider`, `WorkflowDesigner`) turn an apparently harmless deserialization call into arbitrary code execution.
- Detection clue: base64 data starting with `AAEAAAD/////` is the signature of a .NET binary-serialized payload worth investigating.
- Safer alternatives: use `DataContractSerializer`/`System.Text.Json` with strict type allow-lists, and never let the incoming data stream dictate which type gets instantiated.
Try it yourself
Research the `ysoserial.net` tool's README (without running it against anything but your own lab) and identify which gadget chain targets `ObjectDataProvider`, and what real-world component (WPF) that gadget depends on.