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Ruzzy

Skill Active

Ruzzy is a coverage-guided Ruby fuzzer by Trail of Bits. Use for fuzzing pure Ruby code and Ruby C extensions.

Purpose

To provide a robust and production-ready tool for developers and security researchers to find memory corruption and undefined behavior bugs in Ruby applications and extensions.

Features

  • Coverage-guided fuzzing for Ruby
  • Fuzzing for pure Ruby code
  • Fuzzing for Ruby C extensions
  • AddressSanitizer (ASan) and UndefinedBehaviorSanitizer (UBSan) integration
  • Detailed installation and usage instructions

Use Cases

  • Fuzzing Ruby applications or libraries to uncover bugs
  • Testing Ruby C extensions for memory safety issues
  • Improving the security and stability of Ruby codebases
  • Integrating fuzzing into CI/CD pipelines for Ruby projects

Non-Goals

  • Fuzzing non-Ruby languages
  • Providing a general-purpose code analysis tool beyond fuzzing
  • Automating bug fixing

Workflow

  1. Set up environment with ASAN_OPTIONS
  2. Install Ruzzy with clang compiler flags
  3. Write a fuzzing harness (tracer script for pure Ruby)
  4. Run the fuzzer with the harness and optional corpus
  5. Interpret output and reproduce crashes

Practices

  • Fuzzing
  • Security testing
  • Code quality

Prerequisites

  • Linux x86-64 or AArch64/ARM64
  • Recent version of clang (tested back to 14.0.0, latest release recommended)
  • Ruby with gem installed

Trust

  • warning:Issues AttentionIn the last 90 days, 13 issues were opened and 4 were closed, indicating a low closure rate (approx. 24%) and potentially slow maintainer response.

Installation

First, add the marketplace

/plugin marketplace add trailofbits/skills
/plugin install testing-handbook-skills@trailofbits

Quality Score

75 /100
Analyzed about 15 hours ago

Trust Signals

Last commit3 days ago
Stars5.2k
LicenseCC-BY-SA-4.0
Status
View Source

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