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trailofbits/zeroize-audit

Detecta a ausência de zeragem de dados sensíveis no código-fonte e identifica zeragens removidas por otimizações do compilador, com análise em nível de assembly e verificação de fluxo de controle. Use para auditar código C/C++/Rust que lida com segredos, chaves, senhas ou outros dados sensíveis.

O que é zeroize-audit?

O skill trailofbits/zeroize-audit é uma ferramenta especializada para auditores de segurança e desenvolvedores que precisam garantir que dados sensíveis (como chaves criptográficas, senhas e tokens) sejam corretamente zerados na memória após o uso, evitando vazamentos acidentais. Ele vai além da análise estática tradicional ao verificar se o compilador não removeu instruções de zeragem durante otimizações — um problema comum em C/C++ e Rust. O skill funciona analisando código-fonte, gerando assembly correspondente e validando o fluxo de controle para confirmar que a zeragem persiste no binário final. É suportado por ferramentas como Claude Code, Cursor e Codex, sendo ideal para auditorias de segurança em projetos que lidam com dados criptográficos ou segredos de aplicação. Sua abordagem em múltiplas camadas (código, assembly, fluxo de controle) oferece uma garantia robusta contra vazamentos de informações sensíveis.

Funciona com~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/trailofbits/skills/tree/main/skills/zeroize-audit

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Documentação

O que zeroize-audit faz?

Detecta a ausência de zeragem de dados sensíveis no código-fonte e identifica zeragens removidas por otimizações do compilador, com análise em nível de assembly e verificação de fluxo de controle. Use para auditar código C/C++/Rust que lida com segredos, chaves, senhas ou outros dados sensíveis.

Funcionalidades

  • Detecção de zeragem ausente: Varre o código-fonte em busca de buffers ou variáveis que armazenam dados sensíveis e não são zerados após o uso.
  • Análise de otimizações do compilador: Identifica casos em que instruções de zeragem (como memset_s ou zeroize) são removidas por otimizações como dead store elimination.
  • Verificação em assembly: Converte código relevante para assembly e confirma se a zeragem persiste no binário final.
  • Análise de fluxo de controle: Rastreia caminhos de execução para garantir que a zeragem ocorra em todos os cenários, incluindo exceções e early returns.

Plataformas Suportadas

Este skill é compatível com:

  • Claude Code
  • Cursor
  • Codex

Como Usar

  1. Adicione o skill ao seu ambiente de desenvolvimento.
  2. Execute a ferramenta no diretório do seu projeto contendo código C/C++ ou Rust.
  3. Revise os relatórios gerados, que destacam:
    • Locais onde dados sensíveis não são zerados.
    • Zeragens potencialmente removidas por otimizações.
    • Confirmação visual no assembly gerado.

Exemplo

# Análise básica
zeroize-audit scan --path ./src

# Com verificação de assembly
zeroize-audit scan --path ./src --assembly

# Relatório detalhado
zeroize-audit scan --path ./src --output report.md

Requisitos

  • Compilador C/C++ (gcc, clang) ou Rust (rustc) instalado.
  • Acesso ao código-fonte que será auditado.
  • Permissões para executar análises de assembly (se aplicável).

Saída Típica

[WARNING] Linha 42: variável 'secret_key' não é zerada após uso.
[WARNING] Linha 56: chamada para memset() pode ser removida pelo compilador - use memset_s() em vez disso.
[INFO] Zeragem confirmada em assembly para 'password_buffer'.

Contribuição

Relate problemas ou sugira melhorias no repositório oficial.

Licença

Este skill é distribuído sob licença Apache 2.0. Consulte o arquivo LICENSE para mais detalhes.

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

trailofbits/address-sanitizer

AddressSanitizer detects memory errors during fuzzing. Use when fuzzing C/C++ code to find buffer overflows and use-after-free bugs.

trailofbits/aflpp

AFL++ is a fork of AFL with better fuzzing performance and advanced features. Use for multi-core fuzzing of C/C++ projects.

trailofbits/agentic-actions-auditor

Audits GitHub Actions workflows for security vulnerabilities in AI agent integrations including Claude Code Action, Gemini CLI, OpenAI Codex, and GitHub AI Inference. Detects attack vectors where attacker-controlled input reaches AI agents running in CI/CD pipelines, including env var intermediary patterns, direct expression injection, dangerous sandbox configurations, and wildcard user allowlists. Use when reviewing workflow files that invoke AI coding agents, auditing CI/CD pipeline security for prompt injection risks, or evaluating agentic action configurations.

trailofbits/algorand-vulnerability-scanner

Scans Algorand smart contracts for 11 common vulnerabilities including rekeying attacks, unchecked transaction fees, missing field validations, and access control issues. Use when auditing Algorand projects (TEAL/PyTeal).

trailofbits/ask-questions-if-underspecified

Clarify requirements before implementing. Use when serious doubts arise.

trailofbits/atheris

Atheris is a coverage-guided Python fuzzer based on libFuzzer. Use for fuzzing pure Python code and Python C extensions.

trailofbits/audit-augmentation

Augments Trailmark code graphs with external audit findings from SARIF static analysis results and weAudit annotation files. Maps findings to graph nodes by file and line overlap, creates severity-based subgraphs, and enables cross-referencing findings with pre-analysis data (blast radius, taint, etc.). Use when projecting SARIF results onto a code graph, overlaying weAudit annotations, cross-referencing Semgrep or CodeQL findings with call graph data, or visualizing audit findings in the context of code structure.

trailofbits/audit-context-building

Enables ultra-granular, line-by-line code analysis to build deep architectural context before vulnerability or bug finding.

trailofbits/audit-prep-assistant

Prepares codebases for security review using Trail of Bits' checklist. Helps set review goals, runs static analysis tools, increases test coverage, removes dead code, ensures accessibility, and generates documentation (flowcharts, user stories, inline comments).

trailofbits/burpsuite-project-parser

Searches and explores Burp Suite project files (.burp) from the command line. Use when searching response headers or bodies with regex patterns, extracting security audit findings, dumping proxy history or site map data, or analyzing HTTP traffic captured in a Burp project.

trailofbits/cairo-vulnerability-scanner

Scans Cairo/StarkNet smart contracts for 6 critical vulnerabilities including felt252 arithmetic overflow, L1-L2 messaging issues, address conversion problems, and signature replay. Use when auditing StarkNet projects.

trailofbits/cargo-fuzz

cargo-fuzz is the de facto fuzzing tool for Rust projects using Cargo. Use for fuzzing Rust code with libFuzzer backend.

trailofbits/chrome-mcp-troubleshooting

Diagnose and fix Claude in Chrome MCP extension connectivity issues. Use when mcp__claude-in-chrome__* tools fail, return "Browser extension is not connected", or behave erratically.

trailofbits/claude-in-chrome-troubleshooting

Diagnose and fix Claude in Chrome MCP extension connectivity issues. Use when mcp__claude-in-chrome__* tools fail, return "Browser extension is not connected", or behave erratically.

trailofbits/code-improver

Runs an autonomous review-and-fix improvement loop over any code target — a skill, plugin, module, or directory — using a reviewer the user names: any installed skill or agent. Keeps a cross-round findings ledger, escalates when fixes stop converging, and guards scope mechanically. Use when asked to 'improve this code until review passes', 'run an improvement loop with <reviewer>', or to iterate review-and-fix with a specific reviewer. For skills prefer the skill-improver entry; for a branch prefer pr-improver.

trailofbits/code-maturity-assessor

Systematic code maturity assessment using Trail of Bits' 9-category framework. Analyzes codebase for arithmetic safety, auditing practices, access controls, complexity, decentralization, documentation, MEV risks, low-level code, and testing. Produces professional scorecard with evidence-based ratings and actionable recommendations.

trailofbits/codeql

Scans a codebase for security vulnerabilities using CodeQL's interprocedural data flow and taint tracking analysis. Triggers on "run codeql", "codeql scan", "codeql analysis", "build codeql database", or "find vulnerabilities with codeql". Supports "run all" (security-and-quality + security-experimental suites) and "important only" (high-precision security findings) scan modes. Also handles creating data extension models and processing CodeQL SARIF output.

trailofbits/constant-time-analysis

Detects timing side-channel vulnerabilities in cryptographic code. Use when implementing or reviewing crypto code, encountering division on secrets, secret-dependent branches, or constant-time programming questions in C, C++, Go, Rust, Swift, Java, Kotlin, C#, PHP, JavaScript, TypeScript, Python, or Ruby.

trailofbits/constant-time-testing

Constant-time testing detects timing side channels in cryptographic code. Use when auditing crypto implementations for timing vulnerabilities.

trailofbits/cosmos-vulnerability-scanner

Scans Cosmos SDK blockchain modules and CosmWasm contracts for consensus-critical vulnerabilities — chain halts, fund loss, state divergence. 25 core + 16 IBC + 10 EVM + 3 CosmWasm patterns. Use when auditing custom x/ modules, reviewing IBC integrations, or assessing pre-launch chain security. Updated for SDK v0.53.x.

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