security-scan

Security Scan - Multi-Agent Vulnerability Audit

Three-phase security audit pipeline using agent teams. Each phase builds on the previous phase's output.

Phase Overview

Discovery — Scan codebase, find vulnerabilities (including 0-day)
Verification — Two-round cross-verification of discovered vulnerabilities
Validation — PoC coding or analysis documentation for confirmed vulnerabilities

Pre-flight: Project Index Check

Before collecting configuration, check whether the target project has proper context files:

Use Glob to check if {project_path}/CLAUDE.md exists
Use Glob to check if {project_path}/.claude-index/ directory exists

If both exist → Proceed to Quick Start. These files provide critical project context that agents will use during scanning.

If either is missing → Use AskUserQuestion:

question: "项目缺少索引文件，是否先生成？ / Project is missing index files. Generate them first?"
header: "Index"
options:
  - label: "Yes, generate with project-indexer (Recommended)"
    description: "使用 project-indexer skill 生成 CLAUDE.md 和 .claude-index，帮助扫描Agent更好地理解项目结构"
  - label: "Skip, scan without index"
    description: "跳过索引生成，直接开始扫描（Agent对项目理解可能不够全面）"

If user chooses to generate:

Invoke the project-indexer skill on the target project to create CLAUDE.md and .claude-index/
Wait for completion, then proceed to Quick Start

Quick Start

Before any scanning, use AskUserQuestion to collect configuration. Ask these in one call (up to 4 questions):

Question 1 — Report Language:

question: "报告使用什么语言？ / What language for reports?"
header: "Language"
options:
  - label: "中文 (Recommended)"
    description: "所有报告、分析文档使用中文撰写"
  - label: "English"
    description: "All reports and documentation in English"

Question 2 — Team Identity:

question: "选择安全团队背景 / Which security team to deploy?"
header: "Team"
options:
  - label: "Google Security (Recommended)"
    description: "Google Project Zero / Cloud Security 风格，擅长云原生、容器、基础设施安全"
  - label: "Microsoft MSRC"
    description: "Microsoft Security Response Center 风格，擅长系统级漏洞、内核安全、供应链安全"
  - label: "Meta Red Team"
    description: "Meta(Facebook) Red Team 风格，擅长Web安全、API安全、社交平台安全"
  - label: "Apple Security Engineering"
    description: "Apple SEAR 风格，擅长隐私安全、加密实现、移动端安全"

Question 3 — Phase Selection:

question: "执行哪些阶段？ / Which phases to run?"
header: "Phases"
options:
  - label: "Full Pipeline (1→2→3) (Recommended)"
    description: "完整流水线：发现 → 验证 → 编码验证"
  - label: "Phase 1 Only"
    description: "仅执行漏洞发现扫描"
  - label: "Phase 2+3 (have scan report)"
    description: "已有扫描报告，从验证阶段开始"
  - label: "Phase 3 Only (have verified report)"
    description: "已有验证报告，仅执行编码验证"

Question 4 — Domain Expertise:

question: "项目的技术领域？ / Project's technical domain?"
header: "Domain"
multiSelect: false
options:
  - label: "全领域自动扫描 (Recommended)"
    description: "自动识别项目技术栈，覆盖所有相关安全领域，适合大多数项目"
  - label: "Cloud Native / Container"
    description: "Kubernetes, Docker, 微服务, Service Mesh, Helm, Istio, 容器编排, 镜像安全"
  - label: "Web / API / Mobile"
    description: "Web前后端, REST API, GraphQL, WebSocket, SPA, Android/iOS, 小程序"
  - label: "System / Infra / Crypto"
    description: "操作系统, 内核模块, 驱动开发, 加密实现, 区块链, 智能合约, PKI, 密钥管理"

Note: User can also select "Other" to specify custom domains like IoT/embedded, database/middleware, AI/ML pipeline, game security, etc.

After collecting answers, also ask for:

Target project path (if not already provided)
Report output directory (default: {project}/security-report/)

Applying Configuration

Store user choices and propagate to all phases:

Language → Set {report_language} for all agent prompts and report templates. If Chinese: "All reports are written in Chinese". If English: "All reports in English."
Team Identity → Set {team_identity} for agent persona prompts:
- Google: "You are a senior Google Project Zero / Cloud Security engineer..."
- Microsoft: "You are a senior Microsoft MSRC security researcher..."
- Meta: "You are a senior Meta Red Team security engineer..."
- Apple: "You are a senior Apple Security Engineering (SEAR) researcher..."
Phases → Determine which phases to execute
Domain → Set {domain_focus} for agent prompts:
- Full-domain auto scan: First explore the project structure (build files, dependencies, code patterns) to auto-detect the tech stack, then set domain focus accordingly. Cover all 6 vulnerability categories.
- Cloud Native / Container: Prioritize INFRA category, emphasize K8s RBAC, container escape, image security, network policies
- Web / API / Mobile: Prioritize INJ and API categories, emphasize XSS, SSRF, IDOR, auth flows, mobile-specific risks
- System / Infra / Crypto: Prioritize CRYPTO and LOGIC categories, emphasize memory safety, kernel exploits, crypto misuse, side-channels
- Other (user-specified): Adapt scan focus to the user's custom domain description

Output Directory Structure

All phases write to a unified directory structure:

{report_dir}/
├── phase1-discovery/
│   ├── detail-reports/
│   │   ├── {agent-name}-scan-report.md    # Individual agent reports
│   │   └── ...
│   └── security-audit-final-report.md     # Consolidated discovery report
├── phase2-verification/
│   ├── detail-reports/
│   │   ├── round1/
│   │   │   ├── {agent-name}-verify-r1.md
│   │   │   └── ...
│   │   └── round2/
│   │       ├── {agent-name}-verify-r2.md
│   │       └── ...
│   └── verification-final-report.md       # Consolidated verification report
├── phase3-validation/
│   ├── poc/
│   │   ├── {vuln-id}/
│   │   │   ├── poc_exploit.{ext}          # PoC code
│   │   │   ├── run_result.md              # Execution results
│   │   │   └── validation-report.md       # Validation summary
│   │   └── ...
│   ├── analysis/
│   │   ├── {vuln-id}/
│   │   │   └── verification-guide.md      # Analysis for non-local-verifiable
│   │   └── ...
│   └── validation-final-report.md         # Final index & summary
└── final-summary.md                       # Overall project summary (if all 3 phases)

Phase 1: Discovery

See references/phase1-discovery.md for detailed instructions.

Summary:

Create team with 5-6 general-purpose agents in isolated worktrees
Assign each agent a scan domain (see vulnerability categories in references)
Each agent scans code and writes individual report to phase1-discovery/detail-reports/
Team lead consolidates into security-audit-final-report.md

Agent roles — Distribute these scan domains across agents:

Authentication & Authorization (authn/authz bypass, privilege escalation)
Input Validation & Injection (command injection, SQL injection, XSS, path traversal)
Cryptography & Secrets (weak crypto, hardcoded credentials, key management)
Container & Infrastructure (container escape, misconfig, insecure defaults)
API & Network (SSRF, CORS, rate limiting, protocol vulnerabilities)
Logic & Race Conditions (TOCTOU, business logic flaws, resource exhaustion)

Phase 2: Verification

See references/phase2-verification.md for detailed instructions.

Summary:

Create team with 5-6 agents, each reads the Phase 1 final report
Round 1: Each agent independently verifies assigned vulnerabilities against source code
Round 2: Agents cross-review Round 1 results — each agent verifies another agent's findings
Team lead consolidates into verification-final-report.md

Verification criteria per vulnerability:

Can the vulnerable code path be reached?
Are there existing mitigations that prevent exploitation?
Is the severity rating accurate?
For 0-day: Is it truly novel (not a known CVE)?

Phase 3: Validation

See references/phase3-validation.md for detailed instructions.

Summary:

Create team with ~10 agents (can spawn multiple rounds until all vulns covered)
Each agent reads Phase 1 + Phase 2 reports, claims specific vulnerabilities
For each confirmed vulnerability, determine if local PoC is feasible:
- Yes → Write PoC code, execute, document results in phase3-validation/poc/{vuln-id}/
- No → Write analysis + verification guide in phase3-validation/analysis/{vuln-id}/
Team lead produces validation-final-report.md as index of all results

Team Orchestration Pattern

Each phase follows this pattern:

1. TeamCreate with descriptive name (e.g., "security-scan-phase1")
2. TaskCreate for each work item
3. Spawn agents via Agent tool:
   - subagent_type: "general-purpose"
   - team_name: the team name
   - Each agent gets a unique name (e.g., "scanner-authn", "scanner-injection")
   - mode: "bypassPermissions" (agents need to read/write files freely)
4. Assign tasks to agents via TaskUpdate
5. Monitor progress, resolve blockers
6. Consolidate results when all agents complete
7. Shutdown agents via SendMessage type: "shutdown_request"
8. TeamDelete to clean up

Agent spawn template:

Agent tool call:
  subagent_type: "general-purpose"
  name: "{role-name}"
  team_name: "{team-name}"
  isolation: "worktree"
  prompt: |
    You are a senior {team_identity} with deep expertise in {domain}.
    Your task: {specific task description}
    Target project: {project_path}
    Output your report to: {output_path}
    Report language: {report_language}

    ## IMPORTANT: Project Context Files
    Before starting your scan, read these files to understand the project:
    1. Read `{project_path}/CLAUDE.md` — project overview, architecture, conventions
    2. Browse `{project_path}/.claude-index/` — code index with module structure, symbols, dependencies
    These files give you a map of the codebase. Use them to quickly locate relevant
    code areas for your scan domain instead of blindly searching.

    {phase-specific instructions from references}

Report Quality Standards

All reports target academic conference publication quality:

Language: Use {report_language} as selected by the user
Evidence: Every finding must cite specific file paths, line numbers, and code snippets
Severity: Use CVSS v3.1 scoring with clear justification
Reproducibility: Clear steps to reproduce each vulnerability
Novelty: 0-day findings must explain why they are not known CVEs
References: Link to relevant CWE, CVE, and academic literature where applicable

See references/report-templates.md for report format templates. See references/vulnerability-categories.md for classification taxonomy.

About this skill

Phase Overview

Pre-flight: Project Index Check

Quick Start

Applying Configuration

Output Directory Structure

Phase 1: Discovery

Phase 2: Verification

Phase 3: Validation

Team Orchestration Pattern

Report Quality Standards