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What is LibFuzzer?

LibFuzzer is an in-process engine that employs coverage-guided techniques for evolutionary fuzzing. By integrating directly with the library being tested, it injects generated fuzzed inputs into a specific entry point or target function, allowing it to track executed code paths while modifying the input data to improve code coverage. The coverage information is gathered through LLVM’s SanitizerCoverage instrumentation, which provides users with comprehensive insights into the testing process. Importantly, LibFuzzer is continuously maintained, with critical bugs being resolved as they are identified. To use LibFuzzer with a particular library, the first step is to develop a fuzz target; this function takes a byte array and interacts meaningfully with the API under scrutiny. Notably, this fuzz target functions independently of LibFuzzer, making it compatible with other fuzzing tools like AFL or Radamsa, which adds flexibility to testing approaches. Moreover, combining various fuzzing engines can yield more thorough testing results and deeper understanding of the library's security flaws, ultimately enhancing the overall quality of the code. The ongoing evolution of fuzzing techniques ensures that developers are better equipped to identify and address potential vulnerabilities effectively.

What is BFuzz?

BFuzz is a specialized fuzzer tool that takes HTML input to initiate a fresh browser session while executing various test cases produced by the domato generator within the recurve directory. This tool not only automates the entire process but also ensures that the test cases remain unchanged throughout its operation. Upon launching BFuzz, users are given the option to select between Chrome or Firefox for fuzzing; however, it is designed to specifically open Firefox from the recurve folder and generates logs in the terminal for tracking purposes. This lightweight script effectively manages the opening of your browser alongside the execution of test cases, making it user-friendly and efficient. The test cases found in the recurve folder are crafted by the domato tool and come with a main script as well as additional helper code aimed at optimizing the DOM fuzzing process. By utilizing BFuzz, users benefit from a streamlined approach to automated browser testing, ultimately improving the effectiveness of security evaluations for web applications. Thus, it serves as an essential resource for developers and security analysts seeking to enhance their testing methodology.

Media

Media

Integrations Supported

Atheris
C
C++
ClusterFuzz
Fuzzbuzz
Google Chrome
Google ClusterFuzz
Jazzer
Mozilla Firefox
Python

Integrations Supported

Atheris
C
C++
ClusterFuzz
Fuzzbuzz
Google Chrome
Google ClusterFuzz
Jazzer
Mozilla Firefox
Python

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

LLVM Project

Date Founded

2003

Company Website

llvm.org/docs/LibFuzzer.html

Company Facts

Organization Name

RootUp

Company Website

github.com/RootUp/BFuzz

Categories and Features

Categories and Features

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