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/2026-02-20/05-vulnerability-scan.md
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docs/audit/2026-02-20/05-vulnerability-scan.md
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# Base Image Vulnerability Scan
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**Date:** 2026-02-20
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**Auditor:** External Security Review
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**Tool:** Aqua Trivy (latest)
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**Scope:** Base images used in project Dockerfiles
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## Executive Summary
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| Base Image | HIGH | CRITICAL | Total | Status |
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|------------|------|----------|-------|--------|
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| alpine:3.20 | 0 | 0 | 0 | CLEAN |
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| python:3.12-slim | 2 | 0 | 2 | ACTION REQUIRED |
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| node:22-slim | 2 | 1 | 3+ | ACTION REQUIRED |
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| debian:bookworm-slim | 2 | 1 | 3 | ACTION REQUIRED |
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| golang:1.23-alpine | 4 | 2 | 6 | ACTION REQUIRED |
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**Overall Risk Level:** MEDIUM
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---
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## Detailed Findings
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### 1. alpine:3.20
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**Status:** CLEAN
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**Vulnerabilities:** 0 HIGH/CRITICAL
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```
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Report Summary
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┌─────────────────────────────┬────────┬─────────────────┬─────────┐
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│ Target │ Type │ Vulnerabilities │ Secrets │
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├─────────────────────────────┼────────┼─────────────────┼─────────┤
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│ alpine:3.20 (alpine 3.20.9) │ alpine │ 0 │ - │
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└─────────────────────────────┴────────┴─────────────────┴─────────┘
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```
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**Recommendation:** Preferred base image for new containers.
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---
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### 2. python:3.12-slim (debian 13.3)
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**Status:** ACTION REQUIRED
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**Vulnerabilities:** 2 HIGH, 0 CRITICAL
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| Library | CVE | Severity | Status | Title |
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|---------|-----|----------|--------|-------|
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| libc-bin | CVE-2026-0861 | HIGH | affected | glibc: Integer overflow in memalign leads to heap corruption |
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| libc6 | CVE-2026-0861 | HIGH | affected | glibc: Integer overflow in memalign leads to heap corruption |
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**Analysis:**
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- glibc vulnerability CVE-2026-0861 affects memory allocation
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- No fix currently available from Debian
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- Risk: Low for containerized workloads (no untrusted memory allocation)
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**Recommendation:**
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- Monitor for security updates
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- Consider Alpine-based Python images if risk is unacceptable
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---
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### 3. node:22-slim (debian 12.13)
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**Status:** ACTION REQUIRED
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**Vulnerabilities:** 2 HIGH, 1 CRITICAL (OS) + 14 HIGH (Node packages)
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#### OS-Level Vulnerabilities
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| Library | CVE | Severity | Status | Title |
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|---------|-----|----------|--------|-------|
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| libc-bin | CVE-2026-0861 | HIGH | affected | glibc integer overflow |
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| libc6 | CVE-2026-0861 | HIGH | affected | glibc integer overflow |
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| zlib1g | CVE-2023-45853 | CRITICAL | will_not_fix | zlib heap-based buffer overflow |
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#### Node Package Vulnerabilities
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| Package | CVE | Severity | Installed | Fixed | Issue |
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|---------|-----|----------|-----------|-------|-------|
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| glob | CVE-2025-64756 | HIGH | 10.4.5 | 11.1.0 | Command Injection via Malicious Filenames |
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| minimatch | CVE-2026-26996 | HIGH | 9.0.5 | 10.2.1 | ReDoS via repeated wildcards |
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| tar | CVE-2026-23745 | HIGH | 6.2.1, 7.4.3 | 7.5.3 | Arbitrary file overwrite and symlink poisoning |
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| tar | CVE-2026-23950 | HIGH | 6.2.1, 7.4.3 | 7.5.4 | Arbitrary file overwrite via Unicode path collision |
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| tar | CVE-2026-24842 | HIGH | 6.2.1, 7.4.3 | 7.5.7 | Arbitrary file creation via path traversal bypass |
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| tar | CVE-2026-26960 | HIGH | 6.2.1, 7.4.3 | 7.5.8 | Multiple issues with default options |
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**Analysis:**
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- zlib CVE-2023-45853 marked "will_not_fix" - architectural limitation in Debian
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- Node tar package has multiple critical file system vulnerabilities
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- These are build-time dependencies, reducing runtime risk
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**Recommendation:**
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- **HIGH PRIORITY:** Update tar package to 7.5.8+
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- **HIGH PRIORITY:** Update glob to 11.1.0+ or 10.5.0+
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- Monitor for Debian zlib security advisory
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---
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### 4. debian:bookworm-slim (debian 12.13)
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**Status:** ACTION REQUIRED
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**Vulnerabilities:** 2 HIGH, 1 CRITICAL
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| Library | CVE | Severity | Status | Title |
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|---------|-----|----------|--------|-------|
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| libc-bin | CVE-2026-0861 | HIGH | affected | glibc integer overflow |
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| libc6 | CVE-2026-0861 | HIGH | affected | glibc integer overflow |
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| zlib1g | CVE-2023-45853 | CRITICAL | will_not_fix | zlib heap-based buffer overflow |
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**Analysis:**
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- Same vulnerabilities as node:22-slim (same Debian base)
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- zlib vulnerability won't be fixed in Debian 12
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**Recommendation:**
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- Consider migrating to Alpine or Debian 13
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- Monitor security advisories
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---
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### 5. golang:1.23-alpine (alpine 3.22.1)
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**Status:** ACTION REQUIRED
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**Vulnerabilities:** 4 HIGH, 2 CRITICAL
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| Library | CVE | Severity | Status | Fixed Version | Title |
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|---------|-----|----------|--------|---------------|-------|
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| libcrypto3 | CVE-2025-15467 | CRITICAL | fixed | 3.5.5-r0 | OpenSSL: Remote code execution or DoS |
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| libssl3 | CVE-2025-15467 | CRITICAL | fixed | 3.5.5-r0 | OpenSSL: Remote code execution or DoS |
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**Additional vulnerabilities:** 4 HIGH related to Go toolchain (affects build only)
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**Analysis:**
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- OpenSSL CVE-2025-15467 is CRITICAL with RCE potential
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- Fix available (3.5.5-r0) but current image uses 3.5.1-r0
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- This is a significant security issue
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**Recommendation:**
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- **CRITICAL PRIORITY:** Update base image or rebuild with updated packages
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- Alpine 3.22.1 should be updated to include OpenSSL fix
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---
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## Risk Assessment Matrix
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| CVE | CVSS | Exploitability | Container Impact | Overall Risk |
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|-----|------|----------------|------------------|--------------|
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| CVE-2025-15467 (OpenSSL) | CRITICAL | High | High | CRITICAL |
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| CVE-2023-45853 (zlib) | CRITICAL | Low | Medium | HIGH |
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| CVE-2026-0861 (glibc) | HIGH | Low | Low | MEDIUM |
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| CVE-2025-64756 (glob) | HIGH | Medium | Medium | HIGH |
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| CVE-2026-23745 (tar) | HIGH | Medium | High | HIGH |
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---
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## Remediation Priority
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### Immediate (Before Release)
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1. **Update golang:1.23-alpine** - OpenSSL RCE vulnerability
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2. **Update Node tar package** in affected images - Multiple file system vulnerabilities
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### Short Term (Post-Release)
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3. **Update Node glob and minimatch** packages
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4. **Monitor glibc CVE-2026-0861** for patches
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5. **Evaluate Alpine-based alternatives** for Python images
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### Long Term
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6. **Implement automated base image scanning** in CI/CD
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7. **Create base image update policy** (monthly refresh)
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8. **Consider distroless images** for production
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---
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## Base Image Recommendations
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### For New Services
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1. **Prefer Alpine** (alpine:3.20) - currently clean
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2. **Pin to digest** for reproducibility:
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```dockerfile
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FROM alpine:3.20@sha256:exact-digest-here
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```
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3. **Avoid images with unfixed vulnerabilities**
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### Image Selection Priority
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1. `alpine:3.20` - CLEAN
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2. `python:3.12-slim` - 2 HIGH (glibc, no fix)
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3. `node:22-slim` - Multiple HIGH/CRITICAL
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4. `debian:bookworm-slim` - Multiple HIGH/CRITICAL
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5. `golang:1.23-alpine` - CRITICAL OpenSSL (fix available)
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---
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## CI/CD Integration Recommendation
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```yaml
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# Example GitLab CI
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container_scan:
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image: aquasec/trivy:latest
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script:
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- trivy image --severity HIGH,CRITICAL --exit-code 1 $IMAGE
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only:
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- main
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- merge requests
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```
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---
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## Scanning Methodology
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```bash
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# Commands used
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docker pull aquasec/trivy:latest
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docker run --rm aquasec/trivy:latest image --severity HIGH,CRITICAL --quiet alpine:3.20
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docker run --rm aquasec/trivy:latest image --severity HIGH,CRITICAL --quiet python:3.12-slim
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docker run --rm aquasec/trivy:latest image --severity HIGH,CRITICAL --quiet node:22-slim
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docker run --rm aquasec/trivy:latest image --severity HIGH,CRITICAL --quiet debian:bookworm-slim
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docker run --rm aquasec/trivy:latest image --severity HIGH,CRITICAL --quiet golang:1.23-alpine
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```
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---
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## Positive Findings
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1. **Alpine images are clean** - Good baseline option available
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2. **Fixes available** for most vulnerabilities
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3. **No secrets in images** - Confirmed by Trivy scan
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4. **Reasonable image selection** - Using official images
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