Which type of tool can be used to detect vulnerabilities in source code related to improper handling of user input? Port scanner Fuzzer Sniffer Honeypot

A Fuzzer is the type of tool that can be used to detect vulnerabilities in source code related to improper handling of user input.

Here's a step-by-step explanation:

1. A Port Scanner is used to identify open ports and services available on a network host. It doesn't analyze source code for vulnerabilities.

2. A Fuzzer is a tool used in testing where it feeds a series of inputs to a program in an attempt to find instances where invalid inputs cause the program to crash, thereby identifying points of vulnerability. This includes improper handling of user input.

3. A Sniffer is a tool used to monitor and capture network traffic. It doesn't analyze source code for vulnerabilities.

4. A Honeypot is a decoy system set up to attract and trap people who attempt to penetrate other people's systems. It doesn't analyze source code for vulnerabilities.

So, the correct answer is Fuzzer.