docs(audit): add comprehensive security audit report
External security audit of KNEL-AIMiddleware before release: - FINAL-REPORT.md: Executive summary, risk assessment, remediation roadmap - 01-dockerfile-security.md: 38/40 containers run as root (HIGH) - 02-shell-script-security.md: 83 missing set -e/u directives (HIGH) - 03-docker-compose-security.md: 3 privileged services documented (MEDIUM) - 04-secrets-audit.md: PASS - no hardcoded secrets found - 05-vulnerability-scan.md: 14+ CVEs, 1 CRITICAL OpenSSL (golang:1.23-alpine) Assessment: CONDITIONAL PASS for release 💘 Generated with Crush Assisted-by: GLM-5 via Crush <crush@charm.land>
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Charles N Wyble
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docs/audit/2026-02-20/04-secrets-audit.md
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docs/audit/2026-02-20/04-secrets-audit.md
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# Secrets & Credentials Audit
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**Date:** 2026-02-20
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**Auditor:** External Security Review
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**Scope:** All project files for credential exposure
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## Executive Summary
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| Metric | Value |
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|--------|-------|
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| Hardcoded Secrets Found | 0 |
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| Credential Files Exposed | 0 |
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| Secret Patterns in Code | 0 |
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| Gitignored Secret Files | Yes (.env, vendor/) |
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**Overall Assessment: PASS** - Project follows good secret management practices.
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---
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## Detailed Analysis
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### 1. Gitignore Configuration
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**Status:** COMPLIANT
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The `.gitignore` file properly excludes sensitive files:
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```
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# Environment variables
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.env
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# Vendor/cloned repositories
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vendor/
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# IDE files
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.idea/
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*.swp
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```
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#### Verification
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- `.env` is gitignored - actual credentials not committed
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- `vendor/` is gitignored - cloned repos with potential secrets not tracked
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- No sensitive files found in git history (based on file analysis)
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---
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### 2. Environment Variable Template
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**File:** `.env.example`
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**Status:** COMPLIANT
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The `.env.example` file uses placeholder values only:
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```bash
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# Example placeholders (not real credentials)
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PROXMOX_HOST=https://your-proxmox-host:8006
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PROXMOX_USER=root@pam
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PROXMOX_TOKEN_NAME=your-token-name
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PROXMOX_TOKEN_SECRET=your-token-secret
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```
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No actual credentials present.
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---
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### 3. Credential Flow Analysis
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#### Pattern Identified
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```
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.env file (gitignored)
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↓
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Environment Variables
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↓
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Wrapper Scripts (mcp-*-wrapper.sh)
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↓
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Docker Containers
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```
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#### Wrapper Script Pattern
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```bash
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#!/bin/bash
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docker run --rm -i \
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-e PROXMOX_HOST="${PROXMOX_HOST}" \
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-e PROXMOX_USER="${PROXMOX_USER}" \
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-e PROXMOX_TOKEN_SECRET="${PROXMOX_TOKEN_SECRET}" \
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kneldevstack-aimiddleware-proxmox-mcp
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```
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**Assessment:** Secure - credentials passed at runtime, not hardcoded.
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---
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### 4. Dockerfile Secret Analysis
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#### ENV Directives Review
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All ENV directives in Dockerfiles were analyzed:
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| Dockerfile | ENV Variables | Assessment |
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|------------|---------------|------------|
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| proxmox-mcp | PYTHONUNBUFFERED=1 | Safe - not a secret |
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| bitwarden-mcp | NODE_ENV=production | Safe - not a secret |
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| paperless-mcp | PAPERLESS_URL="" | Safe - URL only |
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| penpot-mcp | PENPOT_URL=${PENPOT_URL:-default} | Safe - URL only |
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| postizz-mcp | PORT=${PORT} | Safe - port number |
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**No secrets found in ENV directives.**
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---
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### 5. Potential Secret Patterns Searched
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| Pattern | Files Found | Assessment |
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|---------|-------------|------------|
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| API_KEY=... | 0 | None in codebase |
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| PASSWORD=... | 0 | None in codebase |
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| SECRET=... | 0 | None in codebase |
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| TOKEN=... | 0 | None in codebase |
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| AWS_ACCESS_KEY | 0 | None in codebase |
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| PRIVATE_KEY | 0 | None in codebase |
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| -----BEGIN.*KEY----- | 0 | None in codebase |
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| Bearer [A-Za-z0-9]{20,} | 0 | None in codebase |
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---
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### 6. Test Script Credentials
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**File:** `scripts/validate-all.sh`
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Contains test credentials for validation:
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```bash
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# Test credentials for validation purposes only
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TEST_USER="testuser"
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TEST_PASS="testpass123"
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```
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**Assessment:** ACCEPTABLE - clearly test credentials for validation, not production.
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---
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### 7. Build-Time Secret Exposure
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**File:** `dockerfiles/postizz-mcp/Dockerfile`
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#### Issue Identified
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Build arguments potentially expose configuration:
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```dockerfile
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ARG POSTIZ_WEB_URL=${POSTIZ_WEB_URL}
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ENV PORT=${PORT}
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```
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#### Risk Assessment
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- **URL exposure:** Low risk (not a secret)
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- **PORT exposure:** Minimal risk (non-sensitive)
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- **No API keys in build args:** Confirmed
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**Note:** While not currently a security issue, this pattern could lead to secrets being embedded if future changes add API keys as build arguments.
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---
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## Credential Categories
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### Services Requiring Credentials
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| Service | Credential Type | Storage |
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|---------|-----------------|---------|
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| proxmox-mcp | API Token | .env file |
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| docker-mcp | Docker Socket | Mount |
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| kubernetes-mcp | kubeconfig | File mount |
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| ssh-mcp | SSH Private Key | File mount |
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| bitwarden-mcp | Access Token | .env file |
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| ghost-mcp | API Key | .env file |
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| elasticsearch-mcp | Basic Auth | .env file |
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| nextcloud-mcp | App Password | .env file |
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### Services Without Credentials
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Most MCP servers operate without requiring credentials or accept configuration at runtime.
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---
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## Recommendations
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### 1. Add Secret Scanning to CI/CD (MEDIUM PRIORITY)
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Implement automated secret detection:
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```yaml
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# GitHub Actions example
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- name: Secret Scan
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uses: trufflesecurity/trufflehog@main
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with:
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path: ./
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base: ${{ github.event.repository.default_branch }}
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```
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### 2. Document Required Secrets (LOW PRIORITY)
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Create documentation listing required credentials per service:
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```markdown
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## proxmox-mcp
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- PROXMOX_HOST (required)
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- PROXMOX_USER (required)
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- PROXMOX_TOKEN_NAME (required)
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- PROXMOX_TOKEN_SECRET (required, secret)
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```
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### 3. Consider Secrets Management (FUTURE)
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For production deployment, consider:
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- HashiCorp Vault
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- AWS Secrets Manager
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- Docker Secrets
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- Kubernetes Secrets
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---
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## Positive Findings Summary
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1. **No hardcoded secrets** in any tracked file
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2. **Proper .gitignore** excludes .env and vendor/
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3. **Placeholder-only .env.example** - no real credentials
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4. **Runtime credential injection** - not in images
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5. **No secrets in git history** based on file analysis
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6. **Consistent secure patterns** across wrapper scripts
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---
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## Compliance Check
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| Requirement | Status | Notes |
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|-------------|--------|-------|
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| No hardcoded secrets | PASS | Full codebase scanned |
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| Secrets not in git | PASS | .env gitignored |
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| No secrets in Docker images | PASS | Runtime injection only |
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| Placeholder examples only | PASS | .env.example clean |
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| No secrets in logs | N/A | No logging review performed |
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**Overall Secrets Audit: PASS**
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