Fuzz testing, or fuzzing, is an automated security testing technique that involves sending random, unexpected, malformed, or invalid inputs to a system to identify vulnerabilities, crashes, or unexpected behavior. It is commonly used for security testing of applications, APIs, and systems.
Key Objectives of Fuzz Testing:
- Detect buffer overflows, crashes, memory leaks
- Identify SQL injection, XSS, and other vulnerabilities
- Test the stability and robustness of an application
- Ensure proper error handling
Types of Fuzz Testing
1️⃣ Mutation-Based Fuzzing
- Modifies existing inputs slightly (e.g., changing
"abc"to"a!bc").
2️⃣ Generation-Based Fuzzing
- Generates inputs from scratch based on expected input formats.
3️⃣ Protocol Fuzzing
- Tests network protocols by injecting malformed packets.