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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 ClusterFuzz?

ClusterFuzz is a sophisticated fuzzing platform aimed at detecting security flaws and stability issues in software applications. Used by Google across its product range, it also functions as the fuzzing backend for OSS-Fuzz. This platform boasts a wide array of features that enable seamless integration of fuzzing into the software development lifecycle. It offers fully automated systems for bug filing, triaging, and resolving issues across various issue trackers. In addition, it accommodates several coverage-guided fuzzing engines to optimize results using methods such as ensemble fuzzing and varied fuzzing techniques. The platform supplies comprehensive statistics that help assess the efficiency of fuzzers and monitor crash rates effectively. With an intuitive web interface, it streamlines management activities and crash investigations, while also supporting multiple authentication options through Firebase. Furthermore, ClusterFuzz enables black-box fuzzing, reduces test case sizes, and implements regression identification via bisection methods, rendering it a thorough solution for software testing. The combination of versatility and reliability found in ClusterFuzz significantly enhances the overall software development experience, making it an invaluable asset.

Media

Media

Integrations Supported

Atheris
C
C++
ClusterFuzz
Fuzzbuzz
Google ClusterFuzz
Jazzer

Integrations Supported

Firebase
Google OSS-Fuzz
Honggfuzz
Jira
LibFuzzer
american fuzzy lop

API Availability

Has API

API Availability

Pricing Information

Free
Free Version

Pricing Information

Pricing not provided

Supported Platforms

Windows
Linux

Supported Platforms

Windows
Mac
Linux

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

LLVM Project

Date Founded

2003

Company Website

llvm.org/docs/LibFuzzer.html

Company Facts

Organization Name

Google

Company Location

United States

Company Website

google.github.io/clusterfuzz/

Categories and Features

Fuzz Testing

Not specified

Categories and Features

Fuzz Testing

Not specified

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